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Tatsuya Kawada

Section

Graduate School of Environmental Studies

Job title

Professor

Degree

博士（工学）（東京大学）

researchmap

https://researchmap.jp/read0092428

J-GLOBAL ID

200901071968299525

Education 2

The University of Tokyo　Graduate School, Division of Engineering　化学エネルギー工学専攻

- 1986/03
The University of Tokyo　Faculty of Engineering　合成化学科

- 1984/03

Committee Memberships 32

The SOFC Society of Japan　President

2022/01 - Present
JST　CREST "Nanomechanics" Research Area Advisor

2019/04 - Present
JST　CREST "Innovative Reactions" Research Area Advisor

2018/06 - Present
日本電機工業会　国際標準化委員会

2011/04 - Present
固体イオニクス研究会　幹事

2010/04 - Present
固体イオニクス研究会　幹事

2010/04 - Present
SOFC研究会　幹事

2004/01 - Present
電気化学会固体化学の指針を探る研究会　幹事

1994/04 - Present
電気化学会固体化学の指針を探る研究会　幹事

1994/04 - Present
日本ファインセラミックス協会　「エネルギー関連材料の電気特性評価に関する国際標準化」委員長

2023/04 - 2026/03
日本ファインセラミックス協会（JFCA）　「固体酸化物形燃料電池セル用セラミックス材料の弾性率試験方法と構造評価法」に関する国際標準化委員会，委員長

2021/04 - 2023/03
機械学会東北支部　商議員

2017/03 - 2019/02
機械学会東北支部　商議員

2017/03 - 2019/02
電気化学会東北支部　支部長

2017/01 - 2018/12
電気化学会東北支部　支部長

2017/01 - 2018/12
機械学会東北支部　監事

2017/03 - 2018/02
機械学会東北支部　監事

2017/03 - 2018/02
日本ファインセラミックス協会（JFCA）　「固体酸化物形燃料電池セル用セラミックス材料の特性試験方法」国際標準化委員会

2012/04 - 2015/03
電気化学会　評議員

2010/04 - 2012/03
電気化学会　評議員

2010/04 - 2012/03
機械学会東北支部　商議員

2008/04 - 2010/03
機械学会東北支部　商議員

2008/04 - 2010/03
The American Ceramic Society　International Conference on Advanced Ceramics and Composites実行委員

2005/01 - 2009/01
The American Ceramic Society　International Conference on Advanced Ceramics and Composites実行委員

2005/01 - 2009/01
NEDO「バイオマスエネルギー転換要素技術開発／固体酸化物電解セルを用いたバイオガスからの高純度水素製造プロセスの開発」推進委員会　委員

2004/04 - 2007/03
NEDO「バイオマスエネルギー転換要素技術開発／固体酸化物電解セルを用いたバイオガスからの高純度水素製造プロセスの開発」推進委員会　委員

2004/04 - 2007/03
石油代替電源用素材の試験・評価方法の標準化に関する調査委員会　委員

2004/04 - 2006/03
石油代替電源用素材の試験・評価方法の標準化に関する調査委員会　委員

2004/04 - 2006/03
イオン導電体の特性標準化調査委員会　委員

2001/04 - 2003/03
イオン導電体の特性標準化調査委員会　委員

2001/04 - 2003/03
固体イオニクス学会　第２４回固体イオニクス討論会実行委員

1998/11 -
固体イオニクス学会　第２４回固体イオニクス討論会実行委員

1998/11 -

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Professional Memberships 6

日本機械学会
The American Ceramic Society
The Electrochemical Society
SOFC Society of Japan
The Solid State Ionics Society of Japan
The Electrochemical Society of Japan

︎Show all ︎Show first 5

Research Interests 3

Solid state ionics
Chemical thermodynamics
Energy conversion

Research Areas 3

Nanotechnology/Materials / Structural and functional materials /
Nanotechnology/Materials / Inorganic materials /
Nanotechnology/Materials / Inorganic compounds/materials chemistry /

Awards 1

2018 Outstanding Paper

2018　Emerald Publishing, Ltd.　Numerical simulations of non-stationary distributions of electrochemical potentials in SOFC

Papers 341

Mitigating fracture risks in solid oxide fuel cells: Study on temperature dependence of residual stress and optimal design strategy upon sintering process

Junya Tanaka, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Toshiyuki Hashida

Journal of Power Sources　641　2025/06/15

DOI： 10.1016/j.jpowsour.2025.236850 　

ISSN： 0378-7753
Study on Ni-ceramic cathode degradation in H<inf>2</inf>O electrolysis using a two-dimensional patterned cell

Xiaolin Shao, Riyan Achmad Budiman, Takashi Sato, Mina Yamaguchi, Keiji Yashiro, Tatsuya Kawada

International Journal of Hydrogen Energy　120　201-212　2025/04/17

DOI： 10.1016/j.ijhydene.2025.03.236 　

ISSN： 0360-3199
In Situ Measurement of RedOx-Induced Stresses in Electrolyte of Anode-Supported Solid Oxide Fuel Cells Using the Cosα Method

Mina Yamaguchi, Takumi Komaya, Satoshi Watanabe, Keiji Yashiro, Kazuhisa Sato, Riyan Achmad Budiman, Tatsuya Kawada

Journal of The Electrochemical Society　2025/03/27

DOI： 10.1149/1945-7111/adc62d 　
Elucidating Factors Governing the Discrepancy of Oxygen Vacancy Concentration Between La_0.6Sr_0.4Co_1−yFe_yO_3−δ (y = 0, 0.2, 0.4, 0.6, 0.8, 1) Dense Film and Bulk Electrodes

Daichi Oi, Nanaha Miyashita, Riyan Achmad Budiman, Katherine Develos-Bagarinao, Yuta Kimura, Takashi Nakamura, Keiji Yashiro, Koji Amezawa, Tatsuya Kawada

Journal of The Electrochemical Society　172　(2)　024506-024506　2025/02/01
Publisher: The Electrochemical Society
DOI： 10.1149/1945-7111/adb216 　

ISSN： 0013-4651

eISSN： 1945-7111

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Dense film electrodes are used to understand the reaction mechanisms of solid oxide cells. However, the oxygen vacancy concentration, δ, in films differ from that in bulk materials, which can mislead the understanding of the reaction mechanism. Therefore, a comprehensive study was conducted to elucidate the differences in δ for the air electrode, La_0.6Sr_0.4Co_1−yFe_yO_3−δ (LSCF, y = 0, 0.2, 0.4, 0.6, 0.8, and 1), between film and bulk electrodes. Two key findings emerged: (1) For Co-rich compositions (y ≤ 0.5), significant differences in δ were observed between films and bulk electrodes, while (2) for Fe-rich compositions (y ≥ 0.6), there was almost no difference in δ. Plausible reasons for these discrepancies were investigated: (1) lattice stress in the film, (2) compositional variation within the film electrode, and (3) changes in the electronic conduction. High-temperature X-ray diffraction revealed no significant differences in lattice constant between films and bulk electrodes, and X-ray photoelectron spectroscopy and X-ray absorption spectroscopy indicated no changes in electronic structure. However, scanning transmission electron microscopy/energy dispersive X-ray spectroscopy revealed the presence of Co₃ O₄ formation within the film, suggesting local compositional variations. Therefore, the results indicate that local compositional differences are the most likely factor affecting δ in LSCF films.
High-temperature in situ stress monitoring of a co-fired electrolyte for metal-supported solid oxide cells

Mina Yamaguchi, Takumi Komaya, Zaka Ruhma, Satoshi Watanabe, Keiji Yashiro, Keigo Kumada, Kazuhisa Sato, Toshiyuki Hashida, Itaru Oikawa, Hitoshi Takamura, Riyan Achmad Budiman, Tatsuya Kawada

Journal of Power Sources　630　236147-236147　2025/02
Publisher: Elsevier BV
DOI： 10.1016/j.jpowsour.2024.236147 　

ISSN： 0378-7753
Microstructure Alteration Analysis of Ni/YSZ Cermet by Comb-shaped Ni Patterned Electrode

Nanako Bisaka, Takashi Sato, Riyan Achmad Budiman, Mina Yamaguchi, Tatsuya Kawada, Keiji Yashiro

Journal of the Electrochemical Society　171　(10)　2024/10/01

DOI： 10.1149/1945-7111/ad83f6 　

ISSN： 0013-4651

eISSN： 1945-7111
Evaluation of the effect of oxygen incorporation on the thermo–chemical–mechanical properties of the proton-conducting oxide BaZr<inf>0.8</inf>Yb<inf>0.2</inf>O<inf>3-δ</inf>

Taisei Segami, Ryuta Sato, Riyan Achmad Budiman, Mina Yamaguchi, Keiji Yashiro, Tatsuya Kawada

Acta Materialia　273　2024/07/01

DOI： 10.1016/j.actamat.2024.119978 　

ISSN： 1359-6454
Creep constitutive law prediction via short-term evaluation using a small size testing method

Yihui Huang, Moeno Kadowaki, Takanori Nakano, Keigo Kumada, Satoshi Watanabe, Tatsuya Kawada, Kazuhisa Sato

Energy Reports　10　1126-1134　2023/11
Publisher: Elsevier BV
DOI： 10.1016/j.egyr.2023.07.046 　

ISSN： 2352-4847
Oxygen vacancy concentration, electrochemical oxygen reduction, and performance stability of a LaNiO<inf>3-δ</inf> porous electrode

Riyan Achmad Budiman, Shin Ichi Hashimoto, Deni Shidqi Khaerudini, Keiji Yashiro, Tatsuya Kawada

Solid State Ionics　395　2023/07

DOI： 10.1016/j.ssi.2023.116215 　

ISSN： 0167-2738
Visualizing internal micro-damage distribution in solid oxide fuel cells Peer-reviewed

Kazuhisa Sato, Yoshie Yabuta, Keigo Kumada, Ken-ichi Fukui, Masayuki Numao, Tatsuya Kawada

Journal of Power Sources　570　23359　2023/06

DOI： 10.1016/j.jpowsour.2023.233059 　
(High-Temperature Energy, Materials, & Processes Division Subhash Singhal Award) From Electrochemical to Mechanical Modeling of SOFCs and Their Experimental Validation

Tatsuya Kawada, Satoshi Watanabe, Riyan Achmad Budiman, Keiji Yashiro, Kazuhisa Sato, Toshiyuki Hashida, Yuta Kimura, Takashi Nakamura, Koji Amezawa, Masami Sato, Reika Nomura, Mayu Muramatsu, Kenjiro Terada

ECS Transactions　111　(6)　35-46　2023/05/19
Publisher: The Electrochemical Society
DOI： 10.1149/11106.0035ecst 　

ISSN： 1938-5862

eISSN： 1938-6737

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Tohoku University has been conducting research on the mechanical reliability of SOFCs under the financial support by NEDO (New Energy and Industrial technology Development Organization, Japan). Both numerical and experimental approaches have been taken at various levels, from electrochemical to structural analyses. An in-house code, SIMUDEL, was developed to simulate oxygen potential distribution inside the constituent materials in order to account for the chemical strain in cell/stack analyses. Non-linear stress-strain behaviors and inelastic deformation of the materials were characterized to improve the accuracy of the simulation. Predicting actual cell behavior, however, is still difficult, as unexpected factors often remain for each specific case. It is thus important to have in-situ or operando tools to observe the behavior of cells, such as deformation and stress generation. For that purpose, laser profilometer and X-ray stress analyzer were employed with a specially designed cell holder. Methods for evaluating local current density was also proposed. Currently, we are developing a protocol for testing robustness of planar SOFCs. Severe condition tests will be performed, and the results will be analyzed with the above-mentioned simulation.
Investigation on Reaction Mechanism in an SOFC Composite Cathode by Using Patterned Thin Film Electrodes

Zhuo Diao, Takaaki Imaizumi, Keita Mizuno, Yuta Kimura, Takashi Nakamura, Keiji Yashiro, Fumitada Iguchi, Tatsuya Kawada, Koji Amezawa

ECS Transactions　111　(6)　1145-1152　2023/05/19
Publisher: The Electrochemical Society
DOI： 10.1149/11106.1145ecst 　

ISSN： 1938-5862

eISSN： 1938-6737

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The reaction mechanism in an SOFC composite cathode was investigated by using patterned thin film model electrodes. In this work, we proposed new types of model electrodes, which could reproduce SOFCs cathodic reactions in a composite electrode of a mixed conducting electrode and an electrolyte. Then the model electrode was fabricated by choosing La_0.6Sr_0.4CoO_3-δ (LSC) and Ce_0.9Gd_0.1O_1.95 (GDC) as the electrode and the electrolyte, respectively. From the DC polarization measurements of the model electrode, it was found that making a composite of LSC and GDC can improve the cathodic performance especially at lower temperatures, possibly due to higher oxide ion conduction in GDC than LSC.
Study of Ni-YSZ Electrode Capacitance and Its Correlation with the Microstructure

Mirai Takeda, Keiji Yashiro, Riyan Achmad Budiman, Shinichi Hashimoto, Tatsuya Kawada

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　170　(3)　2023/03

DOI： 10.1149/1945-7111/acc1a4 　

ISSN： 0013-4651

eISSN： 1945-7111
Deformation mechanism of Ni(O) –yttria-stabilized zirconia upon reduction and it s effect on cell stress evolution in solid oxide fuel cells Peer-reviewed

Junya Tanaka, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Toshiyuki Hashida

Journal of Power Sources　550　(1)　232116-232124　2022/12

DOI： 10.1016/j.jpowsour.2022.232116 　
Effects of temperature and hydrogen concentration during reduction on deformation behavior of NiO- yttria stabilized zirconia used in solid oxide fuel cells

Junya Tanaka, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Toshiyuki Hashida

Journal of Power Sources　535　231384-231384　2022/07
Publisher: Elsevier BV
DOI： 10.1016/j.jpowsour.2022.231384 　

ISSN： 0378-7753
In Situ Evaluation of the Influence of Interstitial Oxygen on the Elastic Modulus of La2NiO4

Yuta Kimura, Takashi Nakamura, Koji Amezawa, Keiji Yashiro, Tatsuya Kawada

Metals　11　(12)　1889-1889　2021/11/24
Publisher: MDPI AG
DOI： 10.3390/met11121889 　

eISSN： 2075-4701

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Lattice defects significantly affect the mechanical properties of crystalline metal oxides. The materials for the components of solid oxide fuel cells (SOFCs) are no exception, and hence understanding of the interplay between lattice defects and the mechanical properties of components is important to ensure the mechanical stability of SOFCs. Herein, we performed an in situ evaluation of the temperature and P(O2) dependence of the elastic moduli of La2NiO4 (LN214), a candidate for the cathode material of SOFCs, using the resonance method to understand the influence of interstitial oxygen on its elastic properties. Above 873 K, both the Young’s and shear moduli of LN214 slightly decreased with increasing P(O2), suggesting that these elastic moduli are correlated with interstitial oxygen concentration and decreased with increasing interstitial oxygen. We analyzed the influence of interstitial oxygen on the Young’s modulus of LN214, based on numerically obtained lattice energy. The P(O2) dependence of the Young’s modulus of LN214 was found to be essentially explained by variation in the c-lattice constant, which was triggered by variation in interstitial oxygen concentration. These findings may contribute to a better understanding of the relationship between lattice defects and mechanical properties, and to the improvement of the mechanical stability of SOFCs.
Substitution approach for decoupled two-scale analysis of materially nonlinear composite plates

Masami Sato, Mayu Muramatsu, Shinnosuke Nishi, Tatsuya Kawada, Kenjiro Terada

Computers and Structures　255　2021/10/15
Publisher: Elsevier Ltd
DOI： 10.1016/j.compstruc.2021.106623 　

ISSN： 0045-7949
Metal-supported sofc fabricated by tape casting and its characterization: A study of the co-sintering process

Zaka Ruhma, Keiji Yashiro, Itaru Oikawa, Hitoshi Takamura, Tatsuya Kawada

Journal of Engineering and Technological Sciences　53　(5)　2021/10/04

DOI： 10.5614/j.eng.technol.sci.2021.53.5.11 　

ISSN： 2337-5779

eISSN： 2338-5502
Relationship between microstructure and deformation of porous Ni-based cermets under redox cycling

Kazuhisa Sato, Satoshi Watanabe, Yihui Huang, Taihei Miyasaka, Toshiaki Matsui, Keiji Yashiro, Tatsuya Kawada, Koji Amezawa, Keigo Kumada, Koichi Eguchi

SN Applied Sciences　3　(10)　2021/10
Publisher: Springer Science and Business Media LLC
DOI： 10.1007/s42452-021-04789-w 　

ISSN： 2523-3963

eISSN： 2523-3971

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<title>Abstract</title>This paper discusses the relationship between the elongation and compression behavior and microstructural changes under redox cycles of porous Ni(O)–YSZ cermets for solid oxide fuel cells (SOFC). Mechanical damage in SOFC and SOEC is one of the most important degradation factors governing the electrical performance of cells. Therefore, it is necessary to know the mechanical properties of each component material, such as elastic and deformation properties, in the operating environment. Particularly, of the Ni(O)–YSZ cermets which currently makes up 90% of the volume of the cell, with present mainstream anode supported SOFC and SOEC. Therefore, understanding the properties of the Ni(O)–YSZ cermets plays an important role in ensuring the performance of the entire SOFC and SOEC. In this study, the microstructural changes of Ni(O)–YSZ cermet by reduction, re-oxidation and re-reduction were observed in detail using microstructural observations and systematically compared with the dimensional change behavior. For the dimensional change behavior, a simple model considering the initial porosity and Ni content is proposed, which successfully predicts the dimensional change due to re-oxidation. Furthermore, Ni(O)–YSZ cermets with high Ni content show large initial dimensional changes, but the dimensional reversibility improves with increase of the number of redox cycles.
Performance and stability analysis of SOFC containing thin and dense gadolinium-doped ceria interlayer sintered at low temperature

Yige Wang, Chuan Jia, Zewei Lyu, Minfang Han, Junwei Wu, Zaihong Sun, Fumitada Iguchi, Keiji Yashiro, Tatsuya Kawada

Journal of Materiomics　2021/09
Publisher: Elsevier BV
DOI： 10.1016/j.jmat.2021.09.001 　

ISSN： 2352-8478
Effect of pinholes in electrolyte on re‐oxidation tolerance of anode‐supported solid oxide fuel cells

Keigo Kumada, Kazuhisa Sato, Tatsuya Kawada, Hirofumi Sumi, Hiroyuki Shimada, Toshiyuki Hashida

Fuel Cells　21　(4)　398-407　2021/08
Publisher: Wiley
DOI： 10.1002/fuce.202000062 　

ISSN： 1615-6846

eISSN： 1615-6854
Comparison of Residual Stress Measurement Methods in Solid Oxide Fuel Cell

Kento Oshima, Takumi Komaya, Keiji Yashiro, Fumitada Iguchi, Minfang Han, Yige Wang, Tatsuya Kawada

ECS Transactions　103　(1)　1251-1260　2021/07/09
Publisher: The Electrochemical Society
DOI： 10.1149/10301.1251ecst 　

ISSN： 1938-5862

eISSN： 1938-6737
Evaluation of Reaction Mechanism of PCFC Composite Cathodes by Utilizing Patterned Thin Film Model Electrodes

Zhuo Diao, Katsuya Nishidate, Takaaki Imaizumi, Yuta Kimura, Takashi Nakamura, Yuichi Mikami, Tomohiro Kuroha, Keiji Yashiro, Tatsuya Kawada, Koji Amezawa

ECS Transactions　103　(1)　1745-1751　2021/07/09
Publisher: The Electrochemical Society
DOI： 10.1149/10301.1745ecst 　

ISSN： 1938-5862

eISSN： 1938-6737
Experimental Evaluation of Influence of Stress on Li Chemical Potential and Phase Equilibrium in Two-phase Battery Electrode Materials

Yuta KIMURA, Keita FUNAYAMA, Mahunnop FAKKAO, Takashi NAKAMURA, Naoaki KUWATA, Tatsuya KAWADA, Junichi KAWAMURA, Koji AMEZAWA

Electrochemistry　89　(4)　355-362　2021/07/05
Publisher: The Electrochemical Society of Japan
DOI： 10.5796/electrochemistry.21-00033 　

ISSN： 1344-3542

eISSN： 2186-2451
Corrigendum to evaluation of electrochemical properties of LaNi0.6Fe0.4O3- - Ce0.9Gd0.1O1.95 composite as air electrode for SOFC solid state ionics, 332, 2019, 70–76

R.A. Budiman, S. Hashimoto, Y. Fujimaki, T. Nakamura, K. Yashiro, K. Amezawa, T. Kawada

Solid State Ionics　363　115608-115608　2021/05
Publisher: Elsevier BV
DOI： 10.1016/j.ssi.2021.115608 　

ISSN： 0167-2738
Investigation of Cathodic Reaction Mechanism in Solid Oxide Fuel Cells by Operando X-Ray Absorption Spectroscopy

Yoichiro TSUJI, Koji AMEZAWA, Takayuki NAKAO, Toshiaki INA, Tatsuya KAWADA, Kentaro YAMAMOTO, Yoshiharu UCHIMOTO, Yuki ORIKASA

Electrochemistry　88　(6)　560-565　2020/11/05
Publisher: The Electrochemical Society of Japan
DOI： 10.5796/electrochemistry.20-00108 　

ISSN： 1344-3542

eISSN： 2186-2451
Determination of relevant factors affecting the surface oxygen exchange coefficient of solid oxide fuel cell cathode with ionic conducting oxide coating Peer-reviewed

R. A. Budiman, H. J. Hong, S. Hashimoto, K. Yashiro, K. D. Bagarinao, H. Kishimoto, K. Yamaji, T. Kawada

Solid State Ionics　353　2020/10/01

DOI： 10.1016/j.ssi.2020.115372 　

ISSN： 0167-2738
Influences of Ni content and porosity on mechanical properties of Ni–YSZ composites under solid oxide fuel cell operating conditions Peer-reviewed

Satoshi Watanabe, Shinji Sukino, Taihei Miyasaka, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Toshiyuki Hashida

Journal of Materials Science　55　(20)　8679-8693　2020/07/01

DOI： 10.1007/s10853-020-04624-4 　

ISSN： 0022-2461

eISSN： 1573-4803
Evaluation of electrochemical properties of LaNi <inf>0.6</inf> Fe <inf>0.4</inf> O <inf>3−δ</inf> - Ce <inf>0.9</inf> Gd <inf>0.1</inf> O <inf>1.95</inf> composite as air electrode for SOFC Peer-reviewed

R. A. Budiman, S. Hashimoto, Y. Fujimaki, T. Nakamura, K. Yashiro, K. Amezawa, T. Kawada

Solid State Ionics　332　70-76　2019/04

DOI： 10.1016/j.ssi.2018.12.023 　

ISSN： 0167-2738
A new development strategy of light weight solid oxide fuel cells for electrified airplane system Peer-reviewed

S. Hashimoto, T. Hirota, K. Suzuki, T. Namioka, H. Ito, R. Miyata, H. Takamura, K. Yoshimi, K. Kobayashi, K. Yashiro, T. Kawada, N. Kijima, T. Tsuchiya, T. Manabe, T. Kojima, K. Okai

AIAA Propulsion and Energy Forum and Exposition, 2019　2019

DOI： 10.2514/6.2019-4470 　
Achievements of NEDO Durability Projects on SOFC Stacks in the Light of Physicochemical Mechanisms Peer-reviewed

H. Yokokawa, M. Suzuki, M. Yoda, T. Suto, K. Tomida, K. Hiwatashi, M. Shimazu, A. Kawakami, H. Sumi, M. Ohmori, T. Ryu, N. Mori, M. Iha, S. Yatsuzuka, K. Yamaji, H. Kishimoto, K. Develos-Bagarinao, T. Shimonosono, K. Sasaki, S. Taniguchi, T. Kawada, M. Muramatsu, K. Terada, K. Eguchi, T. Matsui, H. Iwai, M. Kishimoto, N. Shikazono, Y. Mugikura, T. Yamamoto, M. Yoshikawa, K. Yasumoto, K. Asano, Y. Matsuzaki, K. Sato, T. Somekawa

Fuel Cells　19　(4)　311-339　2019

DOI： 10.1002/fuce.201800187 　

ISSN： 1615-6846

eISSN： 1615-6854
Influence of Aging on Mechanical Properties of Yttria-Doped Zirconia Peer-reviewed

Yuta Kimura, Takuto Kushi, Atsushi Unemoto, Koji Amezawa, Tatsuya Kawada

Ceramics　1　(2)　287-303　2018/10

DOI： 10.3390/ceramics1020023 　
Influence of Electrode Reaction on Cr-poisoning in SOFC MIEC Cathodes Peer-reviewed

Shota Kageyama, Yusuke Shindo, Yoshinobu Fujimaki, Keita Mizuno, Yuta Kimura, Takashi Nakamura, Fumitada Iguchi, Keiji Yashiro, Hiroo Yugami, Tatsuya Kawada, Koji Amezawa

13th European SOFC & SOE Forum 2018, Chapter 12　51-58　2018/07

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Chapter12-Sessions B14,B15-51/169
Investigation of Electrode Reaction in Proton Conducting Ceramic Fuel Cell by Using Pattenred Thin Film Model Electrode Peer-reviewed

Yuki Shinomiya, Yoshinobu Fujimaki, Keita Mizuno, Shota Kageyama, Takashi Nakamura, Yuta Kimura, Fumitada Iguchi, Keiji Yashiro, Hiroo Yugami, Tatsuya Kawada, Koji Amezawa

13th European SOFC & SOE Forum 2018, Chapter 08　77-82　2018/07

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Chapter08-Sessions B03,B06-77/169
Impact of Triple Phase Boundary Reaction in SOFC Mixed Conducting Cathodes Peer-reviewed

Keita Mizuno, Yoshinobu Fujimaki, Takashi Nakamura, Yuta Kimura, Kiyofumi Nitta, Oki Sekizawa, Yasuko Terada, Fumitada Iguchi, Keiji Yashiro, Hiroo Yugami, Tatsuya Kawada, Koji Amezawa

13th European SOFC & SOE Forum 2018, Chapter 08　68-76　2018/07

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Chapter08-Sessions B03,B06-68/169
Investigation of rate-determining step of LaNi0.6Co0.4O3-δ film electrode Peer-reviewed

R. A. Budiman, Y. Uzumaki, S. Hashimoto, T. Nakamura, K. Yashiro, K. D. Bagarinao, H. Kishimoto, K. Yamaji, T. Horita, K. Amezawa, T. Kawada

Journal of Solid State Electrochemistry　22　(7)　2227-2235　2018/07/01

DOI： 10.1007/s10008-018-3935-x 　

ISSN： 1432-8488
Shape deformation analysis of anode-supported solid oxide fuel cell by electro-chemo-mechanical simulation Peer-reviewed

Mayu Muramatsu, Masami Sato, Kenjiro Terada, Satoshi Watanabe, Keiji Yashiro, Tatsuya Kawada, Fumitada Iguchi, Harumi Yokokawa

Solid State Ionics　319　194-202　2018/06/01

DOI： 10.1016/j.ssi.2018.01.027 　

ISSN： 0167-2738
Thermochemical CO2 dissociation using Ce0.8Zr0.15Sc0.05O2-δ Peer-reviewed

Ryo Hishinuma, Keiji Yashiro, Shin-ichi Hashimoto, Tatsuya Kawada

Solid State Ionics　317　103-107　2018/04/01

DOI： 10.1016/j.ssi.2018.01.006 　

ISSN： 0167-2738
Corrigendum to “Evaluation of electrical conductivity and oxygen diffusivity of the typical Ruddlesden-Popper oxide Sr3Fe2O7-δ” (Ceramics International (2017) 43 (16264–16269)(S0272884217319090)(10.1016/j.ceramint.2017.08.211)) Peer-reviewed

Yihan Ling, Tianmin Guo, Xiaozhen Zhang, Riyan Achmad Budiman, Yoshinobu Fujimaki, Takashi Nakamura, Bin Lin, Tatsuya Kawada, Koji Amezawa

Ceramics International　44　(2)　2632-2632　2018/02/01

DOI： 10.1016/j.ceramint.2017.10.122 　

ISSN： 0272-8842
Simulation of ferroelastic phase formation using phase-field model Peer-reviewed

M. Muramatsu, K. Yashiro, T. Kawada, K. Terada

International Journal of Mechanical Sciences　146-147　462-474　2018
Publisher: Elsevier Ltd
DOI： 10.1016/j.ijmecsci.2017.12.027 　

ISSN： 0020-7403
Electrochemical performance of LaNi<inf>0.6</inf>Co<inf>0.4</inf>O<inf>3-δ</inf>–Ce<inf>0.9</inf>Gd<inf>0.1</inf>O<inf>1.95</inf> composite electrode and evaluation of its effective reaction length Peer-reviewed

Budiman R.A, Uzumaki Y, Hashimoto S, Nakamura T, Yashiro K, Amezawa K, Kawada T

Journal of Solid State Electrochemistry　22　(12)　3955-3963　2018

DOI： 10.1007/s10008-018-4102-0 　
Anisotropy of fracture toughness of stabilized zirconia investigated by nano-identation method Peer-reviewed

Hideaki Ito, Kazuhisa Sato, Atsushi Unemoto, Shin-Ichi Hashimoto, Koji Amezawa, Tatsuya Kawada

Materials Transactions　59　(1)　23-26　2018

DOI： 10.2320/matertrans.MB201705 　

ISSN： 1345-9678
Oxygen reduction reaction process of LaNi0.6Fe0.4O3 (-) (delta) film - porous Ce0.9Gd0.1O1.95 heterostructure electrode Peer-reviewed

R. A. Budiman, S. Hashimoto, T. Nakamura, K. Yashiro, K. D. Bagarinao, H. Kishimoto, K. Yamaji, T. Horita, K. Amezawa, T. Kawada

SOLID STATE IONICS　312　80-87　2017/12

DOI： 10.1016/j.ssi.2017.10.007 　

ISSN： 0167-2738

eISSN： 1872-7689
Evaluation of electrical conductivity and oxygen diffusivity of the typical Ruddlesden-Popper oxide Sr3Fe2O7-delta Peer-reviewed

Yihan Ling, Tianmin Guo, Xiaozhen Zhang, Riyan Achmad Budiman, Yoshinobu Fujimaki, Takashi Nakamura, Bin Lin, Tatsuya Kawada, Koji Amezawa

CERAMICS INTERNATIONAL　43　(18)　16264-16269　2017/12

DOI： 10.1016/j.ceramint.2017.08.211 　

ISSN： 0272-8842

eISSN： 1873-3956
Electronic conduction mechanism and defect chemical model of LaNi0.4Fe0.6O3- (delta) Peer-reviewed

R. A. Budiman, H. J. Hong, S. Hashimoto, T. Nakamura, K. Yamaji, K. Yashiro, K. Amezawa, T. Kawada

SOLID STATE IONICS　310　148-153　2017/11

DOI： 10.1016/j.ssi.2017.08.014 　

ISSN： 0167-2738

eISSN： 1872-7689
Recent Achievements of NEDO Durability Project with an Emphasis on Correlation Between Cathode Overpotential and Ohmic Loss Peer-reviewed

H. Yokokawa, Y. Hori, T. Shigehisa, M. Suzuki, S. Inoue, T. Suto, K. Tomida, M. Shimazu, A. Kawakami, H. Sumi, M. Ohmori, N. Mori, T. Iha, K. Yamaji, H. Kishimoto, K. Develos-Bagarinao, K. Sasaki, S. Taniguchi, T. Kawada, M. Muramatsu, K. Terada, K. Eguchi, T. Matsui, H. Iwai, M. Kishimoto, N. Shikazono, Y. Mugikura, T. Yamamoto, M. Yoshikawa, K. Yasumoto, K. Asano, Y. Matsuzaki, S. Amaha, T. Somekawa

FUEL CELLS　17　(4)　473-497　2017/08

DOI： 10.1002/fuce.201600186 　

ISSN： 1615-6846

eISSN： 1615-6854
Self-modification of Ni Metal Surfaces with CeO2 to Suppress Carbon Deposition at Solid Oxide Fuel Cell Anodes Peer-reviewed

J. Kubota, S. Hashimoto, T. Shindo, K. Yashiro, T. Matsui, K. Yamaji, H. Kishimoto, T. Kawada

FUEL CELLS　17　(3)　402-406　2017/06

DOI： 10.1002/fuce.201600180 　

ISSN： 1615-6846

eISSN： 1615-6854
Materials properties for the simulation of electro-chemo-mechanical coupling behavior of SOFC Peer-reviewed

K. Yashiro, T. Kawada, S. Watanabe, M. Muramatsu, T. Sakamoto, S. I. Hashimoto, K. Terada, M. Sato, T. Hashida, K. Sato, F. Iguchi, H. Yugami, K. Amezawa, T. Nakamura, Y. Kimura, A. Unemoto

ECS Transactions　78　(1)　2309-2316　2017/05/30

DOI： 10.1149/07801.2309ecst 　

ISSN： 1938-6737 1938-5862

eISSN： 1938-6737
Contribution of triple-phase boundary reaction in cathodic reaction of solid oxide fuel cell Peer-reviewed

Y. Fujimaki, K. Mizuno, Y. Kimura, T. Nakamura, K. Develos-Bagarinao, K. Yamaji, K. Yashiro, T. Kawada, F. Iguchi, H. Yugami, K. Amezawa

ECS Transactions　78　(1)　847-853　2017/05/30

DOI： 10.1149/07801.0847ecst 　

ISSN： 1938-6737 1938-5862
Mechanism of chromium poisoning in SOFC cathode investigated by using pattern thin film model electrode Peer-reviewed

K. Amezawa, Y. Shindo, Y. Fujimaki, Y. Kimura, T. Nakamura, F. Iguchi, K. Yashiro, H. Yugami, T. Kawada

ECS Transactions　78　(1)　965-970　2017/05/30

DOI： 10.1149/07801.0965ecst 　

ISSN： 1938-6737 1938-5862
Mechanical strength evaluation of YSZ, GDC and LSCF under SOFC operating conditions Peer-reviewed

S. Watanabe, K. Sato, F. Iguchi, K. Yashiro, T. Hashida, T. Kawada

ECS Transactions　78　(1)　2181-2190　2017/05/30

DOI： 10.1149/07801.2181ecst 　

ISSN： 1938-6737 1938-5862
Operando Soft X-ray Absorption Spectroscopic Study on a Solid Oxide Fuel Cell Cathode during Electrochemical Oxygen Reduction Peer-reviewed

Takashi Nakamura, Ryo Oike, Yuta Kimura, Yusuke Tamenori, Tatsuya Kawada, Koji Amezawa

CHEMSUSCHEM　10　(9)　2008-2014　2017/05

DOI： 10.1002/cssc.201700237 　

ISSN： 1864-5631

eISSN： 1864-564X
Application of in-situ Raman scattering spectroscopy for stress condition measurement in solid oxide fuel cells Peer-reviewed

Fumitada Iguchi, Shoma Onuki, Makoto Shimizu, Tatsuya Kawada, Hiroo Yugami

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　125　(4)　213-217　2017/04

DOI： 10.2109/jcersj2.16275 　

ISSN： 1882-0743

eISSN： 1348-6535
Simulation Technology on SOFC Durability With an Emphasis on Conductivity Degradation of ZrO2-Base Electrolyte Peer-reviewed

Harumi Yokokawa, Haruo Kishimoto, Taro Shimonosono, Katsuhiko Yamaji, Mayu Muramatsu, Kenjiro Terada, Keiji Yashiro, Tatsuya Kawada

JOURNAL OF ELECTROCHEMICAL ENERGY CONVERSION AND STORAGE　14　(1)　011004　2017/02

DOI： 10.1115/1.4036038 　

ISSN： 2381-6872

eISSN： 2381-6910
A simulation of large scale sediment flow experiment using DEM Peer-reviewed

Masai SATO, Mayu MURAMATSU, Kenjiro TERADA, Satoshi WATANABE, Keiji YASHIRO, Tatsuya KAWADA, Harumi YOKOKAWA

Transactions of JSCES　20170004　2017/01/29

DOI： 10.11421/jsces.2017.20170004 　
NUMERICAL PLATE TESTING FOR NON-LINEAR MULTI-SCALE ANALYSIS OF PLATE-SHAPED DEVICE Peer-reviewed

SATO Masami, MURAMATSU Mayu, MATSUBARA Seishiro, NISHI Shinnosuke, TERADA Kenjiro, YASHIRO Keiji, KAWADA Tatsuya

Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))　73　(2)　I_283-I_294　2017
Publisher: 公益社団法人土木学会

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We propose a new method of multi-scale analysis for plate-like devices such as a flat plate cell of solid oxide fuel cell (SOFC), which is classified into a composite plate composed of in-plane periodic structures. To characterize the macroscopic nonlinear mechanical behavior of the in-plane periodic structure, the method of numerical plate testing is employed. Since the obtained relationships between macroscopic generalized strains and stress cannot be represented by an equivalent homogeneous plate with a single material, we introduce a surrogate model composed of homogeneous layers that is expected to exhibit the same macroscopic responses. After the material parameters of these layers are identified, the macroscopic analysis becomes possible by use of a laminated structure with continuum solid shell elements available in a general-purpose finite element program. Representative numerical examples are presented to demonstrate the capability of the proposed multi-scale analysis method.
Numerical simulations of non-stationary distributions of electrochemical potentials in SOFC Peer-reviewed

Mayu Muramatsu, Keiji Yashiro, Tatsuya Kawada, Kenjiro Tarada

ENGINEERING COMPUTATIONS　34　(6)　1956-1988　2017

DOI： 10.1108/EC-08-2016-0311 　

ISSN： 0264-4401

eISSN： 1758-7077
Effect of a (La,Sr)(2)CoO4 phase on the oxygen exchange reaction of dense and porous (La,Sr)CoO3 electrodes Peer-reviewed

T. Kawada, K. Yashiro, S. I. Hashimoto, K. Amezawa

SOLID-GAS ELECTROCHEMICAL INTERFACES 2 (SGEI 2)　77　(10)　9-14　2017

DOI： 10.1149/07710.0009ecst 　

ISSN： 1938-5862
Triple Phase Boundary Reaction in a Mixed-Conducting SOFC Cathode Peer-reviewed

K. Amezawa, Y. Fujimaki, K. Mizuno, Y. Kimura, T. Nakamura, K. Nitta, Y. Terada, F. Iguchi, K. Yashiro, H. Yugami, T. Kawada

SOLID-GAS ELECTROCHEMICAL INTERFACES 2 (SGEI 2)　77　(10)　41-47　2017

DOI： 10.1149/07710.0041ecst 　

ISSN： 1938-5862
The influence of crystal orientation on the change in Li chemical potential of LiCoO2 under mechanical stress Peer-reviewed

Mahunnop Fakkao, Yuta Kimura, Keita Funayama, Takashi Nakamura, Naold Kuwata, Junichi Kawamura, Tatsuya Kawada, Koji Amezawa

SOLID STATE IONICS　299　(SI)　8-12　2017/01

DOI： 10.1016/j.ssi.2016.10.011 　

ISSN： 0167-2738

eISSN： 1872-7689
The Origin of Instability of Lanthanum Strontium Cobalt Ferrite La0.6Sr0.4Co0.2Fe0.8O3-d under Oxygen Potential Gradient Peer-reviewed

Wang X, Miyazaki T, Yashiro K, Hashimoto S, Kawada T

HIGH TEMPERATURE CORROSION AND MATERIALS CHEMISTRY 12　75　(28)　1-9　2017

ISSN： 1938-5862
Erratum: Corrigendum to “Oxygen nonstoichiometry and transport properties of LaNi0.6Co0.4O3 − δ” (Solid State Ionics (2016) 292 (52–58)) Peer-reviewed

R. A. Budiman, Y. Uzumaki, H. J. Hong, T. Miyazaki, S. Hashimoto, T. Nakamura, K. Yashiro, K. Amezawa, T. Kawada

Solid State Ionics　294　1　2016/10/15
Publisher: Elsevier
DOI： 10.1016/j.ssi.2016.06.017 　

ISSN： 0167-2738
Oxygen nonstoichiometry and transport properties of LaNi0.6Co0.4O3 (-) (delta) (vol 292, pg 52, 2016) Peer-reviewed

R. A. Budiman, Y. Uzumaki, H. J. Hong, T. Miyazaki, S. Hashimoto, T. Nakamura, K. Yashiro, K. Amezawa, T. Kawada

SOLID STATE IONICS　294　116-116　2016/10

DOI： 10.1016/j.ssi.2016.06.017 　

ISSN： 0167-2738

eISSN： 1872-7689
Oxygen nonstoichiometry and transport properties of LaNi0.6Co0.4O3-delta Peer-reviewed

R. A. Budiman, Y. Uzumaki, H. J. Hong, T. Miyazaki, S. Hashimoto, T. Nakamura, K. Yashiro, K. Amezawa, T. Kawada

SOLID STATE IONICS　292　52-58　2016/09

DOI： 10.1016/j.ssi.2016.05.005 　

ISSN： 0167-2738

eISSN： 1872-7689
Electrochemical Impedance Spectroscopy of High-Efficiency Hydrogen Membrane Fuel Cells Based on Sputter-Deposited BaCe0.8Y0.2O3-delta Thin Films Peer-reviewed

Yoshitaka Aoki, Shohei Kobayashi, Tomoyuki Yamaguchi, Etsushi Tsuji, Hiroki Habazaki, Keiji Yashiro, Tatsuya Kawada, Toshiaki Ohtsuka

JOURNAL OF PHYSICAL CHEMISTRY C　120　(29)　15976-15985　2016/07

DOI： 10.1021/acs.jpcc.5b12593 　

ISSN： 1932-7447

eISSN： 1932-7455
Determination of oxygen surface exchange constant of LaNi0.6Fe0.4O3-delta coated with Ce0.9Gd0.1O1.95 by isotope exchange technique Peer-reviewed

R. A. Budiman, T. Miyazaki, S. Hashimoto, K. Yashiro, T. Kawada

SOLID STATE IONICS　286　19-23　2016/03

DOI： 10.1016/j.ssi.2015.12.002 　

ISSN： 0167-2738

eISSN： 1872-7689
Electromotive force measurements of LiCoO2 electrode on a lithium ion-conducting glass ceramics under mechanical stress Peer-reviewed

Keita Funayama, Takashi Nakamura, Naoaki Kuwata, Junichi Kawamura, Tatsuya Kawada, Koji Amezawa

SOLID STATE IONICS　285　(SI)　75-78　2016/02

DOI： 10.1016/j.ssi.2015.09.009 　

ISSN： 0167-2738

eISSN： 1872-7689
The origin of instability of lanthanum strontium cobalt ferrite La0.6Sr0.4Co0.2Fe0.8O3-δ under oxygen potential gradient Peer-reviewed

X. Wang, T. Miyazaki, K. Yashiro, S. Hashimoto, T. Kawada

ECS Transactions　75　(28)　1-9　2016
Publisher: Electrochemical Society Inc.
DOI： 10.1149/07528.0001ecst 　

ISSN： 1938-5862 1938-6737
Modification of Oxygen Surface Exchange Kinetics on a Dense Film of La0.6Sr0.4CoO3-delta by Application of Porous (La,Sr)(2)CoO4 Peer-reviewed

T. Kawada, T. Tairako, K. Nagao, A. Unemoto, M. Sase, K. Yashiro, S. Hashimoto, K. Amezawa

2016 IEEE 16TH INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (IEEE-NANO)　365-366　2016

DOI： 10.1109/NANO.2016.7751558 　
Thermal Properties of Perovskite-Type Oxides La0.6Sr0.4Co1-xFexO3-delta (0 <= x <= 1.0) Peer-reviewed

Yu-Cheol Shin, Shin-ichi Hashimoto, Keiji Yashiro, Koji Amezawa, Tatsuya Kawada

IONIC AND MIXED CONDUCTING CERAMICS 10　72　(7)　105-110　2016

DOI： 10.1149/07207.0105ecst 　

ISSN： 1938-5862
Effect of Mechanical Stress on Lithium Chemical Potential in Positive Electrodes and Solid Electrolytes for Lithium Ion Batteries Peer-reviewed

Keita Funayama, Takashi Nakamura, Naoaki Kuwata, Junichi Kawamura, Tatsuya Kawada, Koji Amezawa

ELECTROCHEMISTRY　83　(10)　894-897　2015/10

DOI： 10.5796/electrochemistry.83.894 　

ISSN： 1344-3542
Characterization of time-varying macroscopic electro-chemo-mechanical behavior of SOFC subjected to Ni-sintering in cermet microstructures Peer-reviewed

M. u Muramatsu, K. Terada, T. Kawada, K. Yashiro, K. Takahashi, S. Takase

COMPUTATIONAL MECHANICS　56　(4)　653-676　2015/10

DOI： 10.1007/s00466-015-1193-7 　

ISSN： 0178-7675

eISSN： 1432-0924
Electrochemical Study of LaNi0.6Fe0.4O3-delta Film Electrode Peer-reviewed

R. A. Budiman, T. Miyazaki, S. Hashimoto, T. Nakamura, K. Yashiro, K. Amezawa, T. Kawada

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　162　(14)　F1445-F1450　2015

DOI： 10.1149/2.0391514jes 　

ISSN： 0013-4651

eISSN： 1945-7111
AN ELECTRO-CHEMO-MECHANICAL ANALYSIS OF SOLID OXIDE FUEL CELL CONSIDERING EVOLUTION OF MICROSTRUCTURE IN POROUS ELECTRODE USING PHASE-FIELD METHOD Peer-reviewed

M. Muramatsu, S. Takase, K. Yashiro, T. Kawada, K. Terada

Coupled Problems in Science and Engineering VI　614-624　2015
A MULTI-SCALE ELECTRO-CHEMO-MECHANICAL ANALYSIS OF SOLID OXIDE FUEL CELL CONSIDERING EVOLUTION OF MICROSTRUCTURE IN POROUS ELECTRODE Peer-reviewed

M. Muramatsu, S. Takase, K. Yashiro, T. Kawada, K. Terada

PROCEEDINGS OF THE 1ST PAN-AMERICAN CONGRESS ON COMPUTATIONAL MECHANICS AND XI ARGENTINE CONGRESS ON COMPUTATIONAL MECHANICS　215-224　2015
Evaluation of High-temperature Electronic and Electrochemical Properties of the Strained La1-xSrxCoO3-delta Films Prepared by a Pulsed Laser Deposition Technique Peer-reviewed

Takashi Nakamura, Daisuke Hemmi, Katsutoshi Iwamoto, Nobuyuki Hirai, Maya Sase, Atsushi Unemoto, Fumimasa Horikiri, Yoshihiro Mori, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

ELECTROCHEMISTRY　82　(10)　884-890　2014/10

DOI： 10.5796/electrochemistry.82.884 　

ISSN： 1344-3542
Direct Observation of Rate Determining Step for Nd2NiO4+delta SOFC Cathode Reaction by operando Electrochemical XAS Peer-reviewed

Yuki Orikasa, Toshiaki Ina, Kentaro Yamamoto, Takayuki Nakao, Atsushi Mineshige, Koji Amezawa, Tatsuya Kawada, Hajime Tanida, Tomoya Uruga, Yoshiharu Uchimoto

ELECTROCHEMISTRY　82　(10)　897-900　2014/10

DOI： 10.5796/electrochemistry.82.897 　

ISSN： 1344-3542
Anelastic properties of La0.6Sr0.4Co1 -yFeyO3-delta at high temperatures Peer-reviewed

Yuta Kimura, Julian Tolchard, Mari-Ann Einarsrud, Tor Grande, Koji Arnezawa, Mikio Fukuhara, Shin-ichi Hashimoto, Tatsuya Kawada

SOLID STATE IONICS　262　(SI)　337-339　2014/09

DOI： 10.1016/j.ssi.2013.08.020 　

ISSN： 0167-2738

eISSN： 1872-7689
Oxide ion and electron transport properties in lanthanum silicate oxyapatite ceramics Peer-reviewed

Atsushi Mineshige, Hiroyuki Mieda, Mitsuaki Manabe, Takahiro Funahashi, Yusuke Daiko, Tetsuo Yazawa, Mina Nishi, Katsuhiko Yamaji, Teruhisa Horita, Koji Amezawa, Keiji Yashiro, Tatsuya Kawada, Hideki Yoshioka

SOLID STATE IONICS　262　(SI)　555-558　2014/09

DOI： 10.1016/j.ssi.2014.04.009 　

ISSN： 0167-2738

eISSN： 1872-7689
Simulation of oxygen diffusion process on electrical conductivity relaxation Peer-reviewed

Honami Kudo, Keiji Yashiro, Shin-ichi Hashimoto, Koji Amezawa, Tatsuya Kawada

SOLID STATE IONICS　262　(SI)　696-700　2014/09

DOI： 10.1016/j.ssi.2014.01.009 　

ISSN： 0167-2738

eISSN： 1872-7689
Development of in situ soft X-ray absorption spectroscopic technique under high temperature and controlled atmosphere Peer-reviewed

Ryo Oike, Koji Amezawa, Takashi Nakamura, Yusuke Tamenori, Keiji Yashiro, Tatsuya Kawada

SOLID STATE IONICS　262　911-913　2014/09

DOI： 10.1016/j.ssi.2014.01.005 　

ISSN： 0167-2738

eISSN： 1872-7689
Crystal structure and thermal expansion behavior of oxygen stoichiometric lanthanum strontium manganite at high temperature Peer-reviewed

Yoshikazu Shirai, Shin-Ichi Hashimoto, Kazuhisa Sato, Keiji Yashiro, Koji Amezawa, Junichiro Mizusaki, Tatsuya Kawada

SOLID STATE IONICS　256　83-88　2014/03

DOI： 10.1016/j.ssi.2013.12.042 　

ISSN： 0167-2738

eISSN： 1872-7689
Transient shift of local oxygen potential in nonstoichiometric oxides upon application of mechanical stress Invited Peer-reviewed

Tatsuya Kawada, Tomohisa Masumitsu, Yuta Kimura, Satoshi Watanabe, Shin-ichi Hashimoto, Keiji Yashiro, Koji Amezawa

JOURNAL OF ELECTROCERAMICS　32　(1)　78-85　2014/02

DOI： 10.1007/s10832-013-9885-x 　

ISSN： 1385-3449

eISSN： 1573-8663
Influence of Surface/Interface on the Performance of MIEC Cathode for SOFC Peer-reviewed

H. Sato, K. Yashiro, M. Sasaki, S. Hashimoto, T. Nakamura, K. Amezawa, T. Kawada

IONIC AND MIXED CONDUCTING CERAMICS 9　61　(1)　37-+　2014

DOI： 10.1149/06101.0037ecst 　

ISSN： 1938-5862
Conduction Properties and Ionic Transference Behavior of CaTi1-XScxO3-delta (x=0.05, 0.1) Peer-reviewed

H. J. Hong, K. Yashiro, S. Hashimoto, T. Kawada

IONIC AND MIXED CONDUCTING CERAMICS 9　61　(1)　151-+　2014

DOI： 10.1149/06101.0151ecst 　

ISSN： 1938-5862
Ferroelastic Domain Reorientations and Its Influence on Mechanical Properties of La0.6Sr0.4Co0.2Fe0.8O3-delta Peer-reviewed

Yuta Kimura, Keiji Yashiro, Shin-ichi Hashimoto, Tatsuya Kawada

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　161　(11)　F3079-F3083　2014

DOI： 10.1149/2.0131411jes 　

ISSN： 0013-4651

eISSN： 1945-7111
Effect of Mechanical Stress on Oxygen Potential of Transition Metal Oxides Peer-reviewed

Yuki Gonoi, Yuta Kimura, Keiji Yashiro, Satoshi Watanabe, Shin-ichi Hashimoto, Tatsuya Kawada

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　161　(11)　F3111-F3116　2014

DOI： 10.1149/2.0181411jes 　

ISSN： 0013-4651

eISSN： 1945-7111
Effect of Mn-doping on stability of Scandia stabilized zirconia electrolyte under dual atmosphere of solid oxide fuel cells Peer-reviewed

Katsuhiko Yamaji, Haruo Kishimoto, Manuel E. Brito, Teruhisa Horita, Harumi Yokokawa, Megumi Shimazu, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

SOLID STATE IONICS　247　102-107　2013/10

DOI： 10.1016/j.ssi.2013.05.019 　

ISSN： 0167-2738
SOFCの耐久性・信頼性向上のための構成材料の機械的基礎物性研究 Peer-reviewed

佐藤一永, 渡辺智, 雨澤浩史, 川田達也, 橋田俊之

セラミックス　48　(3)　159-164　2013/03
Publisher:
ISSN： 0009-031X

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8081
固体酸化物形燃料電池材料の機械的特性のin situ測定 Invited Peer-reviewed

雨澤浩史, 佐藤一永, 橋田俊之, 川田達也

Netsu Sokutei　40　1-7　2013
固体酸化物形燃料電池材料の機械的特性のin situ測定 Peer-reviewed

雨澤浩史, 佐藤一永, 橋田俊之, 川田達也

熱測定　40　(1)　23-29　2013/01

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7746
A study of nickel-substituted lanthanum cobaltite as cathode materials for SOFCs Peer-reviewed

Y. Uzumaki, S. Hashimoto, K. Amezawa, T. Kawada

HIGH TEMPERATURE CORROSION AND MATERIALS CHEMISTRY 10　50　(44)　29-35　2013

DOI： 10.1149/05044.0029ecst 　

ISSN： 1938-5862
Evaluation of Stress Condition of Operated Anode Supported-Type SOFC under Operating Conditions Based on Raman Scattering Spectroscopy Peer-reviewed

Syo Onodera, Masafumi Nagai, Fumidata Iguchi, Noriko Sata, Tatsuya Kawada, Hiroo Yugami

STUDENT POSTERS (GENERAL) - 222ND ECS MEETING/PRIME 2012　50　(48)　83-88　2013

DOI： 10.1149/05048.0083ecst 　

ISSN： 1938-5862
Oxygen Transport in Perovskite Type Oxide La0.6Sr0.4Co0.2Fe0.8O3-delta Peer-reviewed

Honami Kudo, Keiji Yashiro, Shin-ichi Hashimoto, Koji Amezawa, Tatsuya Kawada, Junichiro Mizusaki

HIGH TEMPERATURE CORROSION AND MATERIALS CHEMISTRY 10　50　(44)　37-42　2013

DOI： 10.1149/05044.0037ecst 　

ISSN： 1938-5862
Multimodal Assessment of Durability and Reliability of Flattened Tubular SIS Stacks Peer-reviewed

Y. Matsuzaki, K. Nakamura, T. Somekawa, K. Fujita, T. Horita, K. Yamaji, H. Kishimoto, M. Yoshikawa, T. Yamamoto, Y. Mugikura, H. Yokokawa, N. Shikazono, K. Eguchi, T. Matsui, S. Watanabe, K. Sato, T. Hashida, T. Kawada, K. Sasaki, S. Taniguchi

SOLID OXIDE FUEL CELLS 13 (SOFC-XIII)　57　(1)　325-333　2013

DOI： 10.1149/05701.0325ecst 　

ISSN： 1938-5862
Direct Evaluation of Oxygen Chemical Potential Distribution in an SOFC Cathode by In Situ X-Ray Absorption Spectroscopy Peer-reviewed

Y. Fujimaki, H. Watanabe, Y. Terada, T. Nakamura, K. Yashiro, S. Hashimoto, T. Kawada, K. Amezawa

SOLID OXIDE FUEL CELLS 13 (SOFC-XIII)　57　(1)　1925-1932　2013

DOI： 10.1149/05701.1925ecst 　

ISSN： 1938-5862
Identification of Ni-YSZ Anode Creep Property Using PSO for Multiscale Simulation Peer-reviewed

S. Watanabe, F. Iguchi, K. Sato, K. Yamamoto, T. Hashida, K. Terada, T. Kawada

SOLID OXIDE FUEL CELLS 13 (SOFC-XIII)　57　(1)　1379-1386　2013

DOI： 10.1149/05701.1379ecst 　

ISSN： 1938-5862
Electrochemical performance and reaction mechanism of LaNi 0.6Fe0.4O3-δ - Ce0.9Gd 0.1O1.95 composite electrode for solid oxide fuel cell Peer-reviewed

R. A. Budiman, S. Hashimoto, K. Yashiro, K. Amezawa, T. Kawada

ECS Transactions　57　(1)　1873-1878　2013

DOI： 10.1149/05701.1873ecst 　

ISSN： 1938-6737 1938-5862
Electronic Structures of LaCoO3-Based Oxides Studied by Soft X-ray Absorption Spectroscopy under Controlled Temperatures and Oxygen Partial Pressures Peer-reviewed

R. Oike, K. Amezawa, Y. Tamenori, K. Yashiro, T. Nakamura, T. Kawada

SOLID OXIDE FUEL CELLS 13 (SOFC-XIII)　57　(1)　2051-2056　2013

DOI： 10.1149/05701.2051ecst 　

ISSN： 1938-5862
Evaluation of Stress Condition of Operated Anode Supported-Type SOFC under Operating Conditions Based on Raman Scattering Spectroscopy Peer-reviewed

S. Onuki, S. Onodera, F. Iguchi, M. Shimizu, T. Kawada, H. Yugami

SOLID OXIDE FUEL CELLS 13 (SOFC-XIII)　57　(1)　951-957　2013

DOI： 10.1149/05701.0951ecst 　

ISSN： 1938-5862
Oxygen Nonstoichiometry and Electrochemical Properties in a Thin Film of Nickel Substituted Lanthanum Cobaltite for SOFCs Peer-reviewed

Y. Uzumaki, S. Hashimoto, T. Nakamura, K. Yashiro, K. Amezawa, T. Kawada

SOLID OXIDE FUEL CELLS 13 (SOFC-XIII)　57　(1)　1893-1899　2013

DOI： 10.1149/05701.1893ecst 　

ISSN： 1938-5862
Oxygen nonstoichiometry of Ce0.6La0.4O 2-δ Peer-reviewed

H. Sato, S. Hashimoto, T. Nakamura, K. Yashiro, K. Amezawa, T. Kawada

ECS Transactions　57　(1)　1125-1133　2013

DOI： 10.1149/05701.1125ecst 　

ISSN： 1938-6737 1938-5862
The Effect of Ferroelasticity of La1-xSrxCo1-yFeyO3-delta on the Mechanical Stability of Solid Oxide Fuel Cells Peer-reviewed

Yuta Kimura, Julian Tolchard, Mari-Ann Einarsrud, Tor Grande, Koji Amezawa, Shin-ichi Hashimoto, Tatsuya Kawada

SOLID OXIDE FUEL CELLS 13 (SOFC-XIII)　57　(1)　635-642　2013

DOI： 10.1149/05701.0635ecst 　

ISSN： 1938-5862
The effect of coexisting oxides upon carbon formation on Ni surface Peer-reviewed

Taiki Shindo, Satoshi Watanabe, Shin-Ich Hashimoto, Keiji Yashiro, Tatsuya Kawada, Takaaki Taniguchi, Takao Kudo, Yasushi Sato

ECS Transactions　57　(1)　1571-1576　2013

DOI： 10.1149/05701.1571ecst 　

ISSN： 1938-6737 1938-5862
Cathodic Reaction of Perovskite Oxide Electrodes on a Proton Conducting Electrolyte Peer-reviewed

K. Suzuki, S. Hashimoto, K. Yashiro, K. Amezawa, T. Kawada

SOLID OXIDE FUEL CELLS 13 (SOFC-XIII)　57　(1)　1985-1992　2013

DOI： 10.1149/05701.1985ecst 　

ISSN： 1938-5862
EFFECTS OF A PHASE TRANSITION AND OXYGEN NONSTOICHIOMETRY ON ELASTIC MODULUS OF La0.6Sr0.4Co1-yFeyO3-delta Peer-reviewed

Yuta Kimura, Takuto Kushi, Tatsuya Kawada, Shin-Ichi Hashimoto, Koji Amezawa, Keiji Yashiro, Junichiro Mizusaki

Solid State Ionics: Ionics for Sustainable World　235-245　2013
SOFC低温作動化を目指したヘテロ界面電極の創製

八代圭司, 中村崇司, 水崎純一郎, 雨澤浩史, 井口史匡, 柴田佳和, 大沢洋平, 熊谷貴博, 湯上浩雄, 川田達也

第21回SOFC研究発表会予稿集　148-151　2012/12
SOFC構成材料の物理化学的・機械的特性とセル・スタックの信頼性

川田達也, 渡辺智, 坂本正, 尾澤伸樹, 佐藤一永, 橋田俊之, 宇根本篤, 八代圭司, 雨澤浩史, 水崎純一郎, 井口史匡, 橋本真一, 湯上浩雄, 寺田賢二郎

第21回SOFC研究発表会予稿集　28-34　2012/12
Effects of Redox Cycling on the Mechanical Properties of Ni-YSZ Cermets for SOFC Anodes as a Function of Porosity Peer-reviewed

Taihei Miyasaka, Shinji Sukinou, Satoshi Watanabe, Kazuhisa Sato, Tatsuya Kawada, Toshiyuki Hashida

Proceedings of Ninth International Conference on Flow Dynamics, September 19-21, 2012, Sendai, Miyagi, Japan, (2012)　556-557　2012/09/19
Influences of Temperature and Oxygen Partial Pressure on Mechanical Properties of La0.6Sr0.4Co1-yFeyO3-d Peer-reviewed

Yuta Kimura, Takuto Kushi, Shin-ichi Hashimoto, Koji Amezawa, Tatsuya Kawada

JOURNAL OF THE AMERICAN CERAMIC SOCIETY　95　(8)　2608-2613　2012/08

DOI： 10.1111/j.1551-2916.2012.05265.x 　

ISSN： 0002-7820
Electrical conductivities of strontium-doped rare earth ultraphosphates and oxyphosphates Peer-reviewed

Atsushi Unemoto, Koji Amezawa, Tatsuya Kawada

JOURNAL OF ELECTROCERAMICS　29　(1)　29-36　2012/08

DOI： 10.1007/s10832-012-9734-3 　

ISSN： 1385-3449

eISSN： 1573-8663
Local structural arrangements around oxygen and hydrogen-related defects in proton conducting LaP3O9 investigated by first principles calculations Peer-reviewed

Koji Amezawa, Hayato Takahashi, Akihide Kuwabara, Atsushi Unemoto, Tatsuya Kawada

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY　37　(9)　7995-8003　2012/05

DOI： 10.1016/j.ijhydene.2011.11.069 　

ISSN： 0360-3199

eISSN： 1879-3487
Effects of Physicochemical and Mechanical Properties of the Materials on Reliability of SOFC Invited Peer-reviewed

Tatsuya Kawada, Satoshi Watanabe, Fumitada Iguchi, Kazuhisa Sato, Shin-ichi Hashimoto, Nobuki Ozawa, Tomomi Shimazaki, Kenjiro Terada, Keiji Yashiro, Koji Amezawa, Toshiyuki Hashida, Momoji Kubo, Hiroo Yugami, Junichiro Mizusaki

Journal of the Hydrogen Energy Systems Society of Japan　37　(2)　101-106　2012/02
多孔質微細構造の力学的作用を考慮した焼結シミュレーションによるマクロ物性予測 Peer-reviewed

笹川崇, 高橋健, 寺田賢二郎, 川田達也

計算工学会論文集　2012　P20120004　2012
Stability of La0.6Sr0.4Co0.2Fe0.8O3-delta as SOFC Cathode Peer-reviewed

Mi-Young Oh, Atsushi Unemoto, Koji Amezawa, Tatsuya Kawada

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　159　(10)　F659-F664　2012

DOI： 10.1149/2.063210jes 　

ISSN： 0013-4651
Compositional and Mechanical Stabilities of a (La, Sr)(Co, Fe) O3-delta Cathode under SOFC Operation Invited Peer-reviewed

T. Kawada, M. -Y. Oh, H. Watanabe, Y. Kimura, Y. Fujimaki, T. Masumitsu, S. Watanabe, S. Hashimoto, K. Amezawa

IONIC AND MIXED CONDUCTING CERAMICS 8　45　(1)　307-312　2012

DOI： 10.1149/1.3701320 　

ISSN： 1938-5862
Electrochemical Oxygen Reduction on LaNi0.6Fe0.4O3-delta Film electrode Peer-reviewed

R. A. Budiman, S. Hashimoto, K. Amezawa, T. Kawada

IONIC AND MIXED CONDUCTING CERAMICS 8　45　(1)　287-293　2012

DOI： 10.1149/1.3701318 　

ISSN： 1938-5862
THE DESIGN AND DEVELOPMENT OF AN EVALUATION SYSTEM FOR REDOX CHARACTERISTICS OF ANODE SUPPORTED SOFCS USING IN-SITU ACOUSTIC EMISSION AND ELECTROCHEMICAL TECHNIQUE Peer-reviewed

S. Hashimoto, H. Watanabe, T. Sakamoto, T. Kawada, K. Yashiro, J. Mizusaki, K. Kumada, D. Changsheng, K. Sato, T. Hashida

PROCEEDINGS OF THE ASME 10TH FUEL CELL SCIENCE, ENGINEERING, AND TECHNOLOGY CONFERENCE, 2012　519-523　2012
SOFCの機械的信頼性・耐久性向上に向けたその場観察手法開発

井口史匡, 佐藤一永, 島崎知実, 尾澤伸樹, 寺田賢二郎, 橋田俊之, 湯上浩雄, 八代圭司, 坂本正, 宇根本篤, 水崎純一郎, 橋本真一, 渡辺智, 雨澤浩史, 川田達也

第20回SOFC研究発表会予稿集　144-147　2011/12
ラマン散乱分光を用いた稼働中の電極支持型セルにおける応力状態評価

小野寺祥, 井口史匡, 永井将文, 佐多教子, 川田達也, 湯上浩雄

第20回SOFC研究発表会予稿集　124-129　2011/12
Elastic modulus and internal friction of SOFC electrolytes at high temperatures under controlled atmospheres Peer-reviewed

Takuto Kushi, Kazuhisa Sato, Atsushi Unemoto, Shinichi Hashimoto, Koji Amezawa, Tatsuya Kawada

JOURNAL OF POWER SOURCES　196　(19)　7989-7993　2011/10

DOI： 10.1016/j.jpowsour.2011.05.040 　

ISSN： 0378-7753
Elastic moduli of Ce0.9Gd0.1O2-delta at high temperatures under controlled atmospheres Peer-reviewed

Koji Amezawa, Takuto Kushi, Kazuhisa Sato, Atsushi Unemoto, Shin-ichi Hashimoto, Tatsuya Kawada

SOLID STATE IONICS　198　(1)　32-38　2011/09

DOI： 10.1016/j.ssi.2011.07.009 　

ISSN： 0167-2738
Electrical conductivity and chemical diffusion in Perovskite-type proton conductors in H-2-H2O gas mixtures Peer-reviewed

Keiji Yashiro, Satoshi Akoshima, Takao Kudo, Masatsugu Oishi, Hiroshige Matsumoto, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

SOLID STATE IONICS　192　(1)　76-82　2011/06

DOI： 10.1016/j.ssi.2010.03.011 　

ISSN： 0167-2738
Control of mixed protonic and electronic conductivity by mixing rare-earth ortho-borates Peer-reviewed

Hayato Takahashi, Atsushi Unemoto, Koji Amezawa, Tatsuya Kawada

SOLID STATE IONICS　192　(1)　275-278　2011/06

DOI： 10.1016/j.ssi.2010.07.023 　

ISSN： 0167-2738
Conductivity Evaluation of Rutile-Type Th1-xNbxO2 as Interconnect Material for Low Temperature Solid Oxide Fuel Cells Peer-reviewed

Hideo Michibata, Koichi Itoh, Akifusa Hagiwara, Tatsuya Kawada, Junichiro Mizusaki

ELECTROCHEMISTRY　79　(4)　246-248　2011/04

DOI： 10.5796/electrochemistry.79.246 　

ISSN： 1344-3542
Nanoprotonics in perovsikte-type oxides: Reversible changes in color and ion conductivity due to nanoionics phenomenon in platinum-containing perovskite oxide Peer-reviewed

Hiroshige Matsumoto, Takayoshi Tanji, Koji Amezawa, Tatsuya Kawada, Yoshiharu Uchimoto, Yoshihisa Furuya, Takaaki Sakai, Maki Matsuka, Tatsumi Ishihara

SOLID STATE IONICS　182　(1)　13-18　2011/02

DOI： 10.1016/j.ssi.2010.11.016 　

ISSN： 0167-2738

eISSN： 1872-7689
Mechanical Properties of La0.6Sr0.4Co0.2Fe0.8O3-d under Various Temperatures and Oxygen Partial Pressures Peer-reviewed

Y. Kimura, T. Kushi, S. Hashimoto, S. Watanabe, K. Amezawa, T. Kawada, Y. Fukuda, A. Unemoto, K. Sato, K. Yashiro, J. Mizusaki, T. Hashida

Electrochemical Society Transactions,　35　(1)　2429-2934　2011
High-Temperature Protonic Conduction in LaFeO3-SrFeO3-delta-SrZrO3 Solid Solutions Peer-reviewed

Atsushi Unemoto, Atsushi Kaimai, Kazuhisa Sato, Naoto Kitamura, Keiji Yashiro, Hiroshige Matsumoto, Junichiro Mizusaki, Koji Amezawa, Tatsuya Kawada

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　158　(2)　B180-B188　2011

DOI： 10.1149/1.3518426 　

ISSN： 0013-4651
In situ Observation of the Deformation and Mechanical Damage of SOFC Cell/Stack Peer-reviewed

K. Sato, T. Sakamoto, A. Kaimai, K. Yashiro, K. Amezawa, T. Hashida, J. Mizusaki, T. Kawada

SOLID OXIDE FUEL CELLS 12 (SOFC XII)　35　(1)　225-229　2011

DOI： 10.1149/1.3569997 　

ISSN： 1938-5862
Evaluation of Stress Conditions in Operated Anode Supported Type Cells Based on In-situ Raman Scattering Spectroscopy Peer-reviewed

Masafumi Nagai, Fumitada Iguchi, Syo Onodera, Noriko Sata, Tatsuya Kawada, Hiroo Yugami

SOLID OXIDE FUEL CELLS 12 (SOFC XII)　35　(1)　519-525　2011

DOI： 10.1149/1.3570028 　

ISSN： 1938-5862
Multiscale Simulation of Electro-Chemo-Mechanical Coupling Behavior of PEN Structure under SOFC Operation Peer-reviewed

K. Terada, T. Kawada, K. Sato, F. Iguchi, K. Yashiro, K. Amezawa, M. Kubo, H. Yugami, T. Hashida, J. Mizusaki, H. Watanabe, T. Sasagawa, H. Aoyagi

SOLID OXIDE FUEL CELLS 12 (SOFC XII)　35　(1)　923-933　2011

DOI： 10.1149/1.3570073 　

ISSN： 1938-5862
Mechanical Properties of Ce0.9Gd0.1O2-delta at High Temperatures under Controlled Atmospheres Peer-reviewed

Takuto Kushi, Kazuhisa Sato, Atsushi Unemoto, Koji Amezawa, Tatsuya Kawada

SOLID OXIDE FUEL CELLS 12 (SOFC XII)　35　(1)　1145-1149　2011

DOI： 10.1149/1.3570096 　

ISSN： 1938-5862
Effect of Redox Cycling on Mechanical Properties of Ni-YSZ Cermets for SOFC Anodes Peer-reviewed

S. Sukino, S. Watanabe, K. Sato, F. Iguchi, H. Yugami, T. Kawada, J. Mizusaki, T. Hashida

SOLID OXIDE FUEL CELLS 12 (SOFC XII)　35　(1)　1473-1482　2011

DOI： 10.1149/1.3570133 　

ISSN： 1938-5862
Cooperative Investigations on Degradation of Cathode Materials in Segment-in-Series Cells by MHI Peer-reviewed

Harumi Yokokawa, Haruo Kishimoto, Katsuhiko Yamaji, Teruhisa Horita, Takao Watanabe, Tohru Yamamoto, Koichi Eguchi, Toshiaki Matsui, Kazunari Sasaki, Yusuke Shiratori, Tatsuya Kawada, Kazuhisa Sato, Toshiyuki Hashida, Atsushi Unemoto, Tatsuo Kabata, Kazuo Tomida

SOLID OXIDE FUEL CELLS 12 (SOFC XII)　35　(1)　2191-2200　2011

DOI： 10.1149/1.3570212 　

ISSN： 1938-5862
Material Stability and Cation Transport of La0.6Sr0.4Co0.2Fe0.8O3-delta in SOFC Cathodic Conditions Peer-reviewed

M. Oh, A. Unemoto, K. Amezawa, T. Kawada

SOLID OXIDE FUEL CELLS 12 (SOFC XII)　35　(1)　2249-2253　2011

DOI： 10.1149/1.3570220 　

ISSN： 1938-5862
y Mechanical Properties of La0.6Sr0.4Co1-yFeyO3-delta under Various Temperatures and Oxygen Partial Pressures Peer-reviewed

Y. Kimura, T. Kushi, S. Hashimoto, S. Watanabe, K. Amezawa, T. Kawada, Y. Fukuda, A. Unemoto, K. Sato, K. Yashiro, J. Mizusaki, T. Hashida

SOLID OXIDE FUEL CELLS 12 (SOFC XII)　35　(1)　2429-2434　2011

DOI： 10.1149/1.3570240 　

ISSN： 1938-5862
Fracture process of nonstoichiometric oxide based solid oxide fuel cell under oxidizing/reducing gradient conditions Peer-reviewed

Sato, Kazuhisa Yashiro, Tatsuya Kawada, Tatsuya Yugami, Hiroo Hashida, Toshiyuki Mizusaki, Junichiro

J. Power Sources　195　(17 Sp. Iss. SI)　5481-5486　2010/09/01

DOI： 10.1016/j.jpowsour.2010.03.077 　

ISSN： 0378-7753
Effect of thickness of Gd0.1Ce0.9O1.95 electrolyte films on electrical performance of anode-supported solid oxide fuel cells Peer-reviewed

Changsheng Ding, Hongfei Lin, Kazuhisa Sato, Koji Amezawa, Tatsuya Kawada, Junichiro Mizusaki, Toshiyuki Hashida

JOURNAL OF POWER SOURCES　195　(17)　5487-5492　2010/09

DOI： 10.1016/j.jpowsour.2010.03.075 　

ISSN： 0378-7753

eISSN： 1873-2755
Defect structure analysis of proton-oxide ion mixed conductor BaCe0.9Nd0.1O3-delta Peer-reviewed

Masatsugu Oishi, Satoshi Akoshima, Keiji Yashiro, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

SOLID STATE IONICS　181　(29-30)　1336-1343　2010/09

DOI： 10.1016/j.ssi.2010.07.034 　

ISSN： 0167-2738
Improvement of electrochemical performance of anode-supported SOFCs by NiO-Ce0.9Gd0.1O1.95 nanocomposite powders Peer-reviewed

Changsheng Ding, Hongfei Lin, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki, Toshiyuki Hashida

SOLID STATE IONICS　181　(25-26)　1238-1243　2010/08

DOI： 10.1016/j.ssi.2010.06.037 　

ISSN： 0167-2738
Electrical conduction and mass transport properties of SrZr0.99Fe0.01O3 (-) (delta) Peer-reviewed

Atsushi Unemoto, Atsushi Kaimai, Kazuhisa Sato, Naoto Kitamura, Keiji Yashiro, Hiroshige Matsumoto, Junichiro Mizusaki, Koji Amezawa, Tatsuya Kawada

SOLID STATE IONICS　181　(19-20)　868-873　2010/07

DOI： 10.1016/j.ssi.2010.05.002 　

ISSN： 0167-2738
J0802-4-4 Development of a gas environment controlled materials testing system for SOFCs

WATANABE Satoshi, SATO Kazuhisa, TAKEYAMA Yohei, SUKINOU Shinji, AMEZAWA Koji, HASHIDA Toshiyuki, KAWADA Tatsuya

The proceedings of the JSME annual meeting　2010　235-236　2010
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2010.7.0_235 　

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The objective of this work is to study relationship between oxygen potential and mechanical properties of an oxygen nonstoichiometric compound with Ce_<0.9>Gd_<0.1>O_<2-δ> Under high temperatures and reducing conditions, oxygen content in Ce_<0.9>Gd_<0.1>O_<2-δ> changes and oxygen defects are generated. Therefore Mechanical properties of Ce_<0.9>Gd_<0.1>0_<2-δ> can change under such conditions. In this study, we developed a new testing apparatus for small punch test, which is able to measure mechanical properties under high temperatures and controlled atmospheric conditions. The fracture stress Ce_<0.9>Gd_<0.1>O_<2-δ> was almost constant regardless of oxygen partial pressure, while elastic modulus decreased with decreasing oxygen partial pressure in reducing atmospheres. Elastic modulus relates oxygen vacancy concentration.
J0802-4-3 Investigation of Mechanical Properties of La_<0.6>Sr_<0.4>Co_<0.2>Fe_<0.8>O_<3-δ> at High Temperatures in Controlled Atmospheres Using Resonance Method

KIMURA Yuta, KUSHI Takuto, WATANABE Satoshi, SATO Kazuhisa, UNEMOTO Atsushi, AMEZAWA Koji, HASHIDA Toshiyuki, KAWADA tatsuya

The proceedings of the JSME annual meeting　2010　233-234　2010
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2010.7.0_233 　

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This paper examined mechanical properties, Young's modulus, shear modulus, Poisson's ratio and internal friction, of La_<0.6>Sr_<0.4>Co_<0.2>Fe_<0.8>O_<3-δ> in the temperature range between 298 and 1173 K, and the oxygen partial pressure (P(O_2)) range between 0.1 and 10^<-4> bar by using resonance method. The Young's modulus of La_<0.6>Sr_<0.4>Co_<0.2>Fe_<0.8>O_<3-δ> gradually decreased in the temperature range between 298 and 823 K and then drastically increased above 873 K. P(0_2) dependencies of Young's modulus showed different trends depending on temperature. At 1173K, Young's modulus decreased with decreasing P(O_2), while increased down to 5.0×10^<-3> bar and then decreased with decreasing P(O_2) at 1073K. At 973K, it monotonically increased with decreasing P(O_2), and at 873K, slightly increased with decreasing P(O_2).
J0802-4-1 Mechanical properties of zirconia based electrolytes evaluated by nano-indentation test

ITO Hideaki, SATO Kazuhisa, UNEMOTO Atsushi, AMEZAWA Koji, KAWADA Tatsuya

The proceedings of the JSME annual meeting　2010　229-230　2010
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2010.7.0_229 　

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Young's modulus and hardness of polycrystalline sintered compacts of yttria-stabilized zirconia (YSZ), (Y_20_3)_<0.08>(Zr0_2)_<0.92> and gadolinium-doped ceria (GDC) (Gd_2O_3)_<0.05>(Ce0_2)_<0.90> were investigated by using the nano-indentation method. Together with results obtained by the secondary electron microscope observation and the electron backscattering diffraction analysis, the effect of the crystal orientation on the mechanical properties was discussed. It was empirically demonstrated that the Young's moduli of YSZ and GDC depend on the crystal orientation. The Young's moduli of YSZ and GDC showed the highest values on the (001) surface while the lowest values on the (111) surface. However, the observed anisotropy of the Young's modulus of YSZ was rather small compared with predicted one from the single crystal elastic constants in literature.
J0802-4-5 Effect of Redox cycling on mechanical properties of Ni-YSZ for SOFC anodes

SUKINO Shinji, Ding Changsheng, WATANABE Satoshi, SATO Kazuhisa, KAWADA Tatsuya, HASHIDA Toshiyuki

The proceedings of the JSME annual meeting　2010　237-238　2010
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2010.7.0_237 　

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Effects of redox cycling on the mechanical properties of Ni-YSZ composites were investigated by using a Small Punch(SP) testing method. The compositions of the Ni-YSZ composites tested in this study were 0:100 vol. %, 15:85 vol. %, 30:70vol. %, and 50:50 vol. %. Electrical conductivity measurements suggested that the Ni particles formed a network-like structure at the Ni content greater than 30 vol. %. Experimental results obtained from the SP tests demonstrated that ductile-like deformation was induced under a reducing environment (at oxygen partial pressure 1 × 10^<-18>atm) for the Ni contents of 30 and 50 vol. %. The ductile-like behavior could be attributed to the formation of Ni network. The first complete re-oxidation of Ni-YSZ composites then caused critical damage and resulted in a drastic strength reduction, probably due to Ni agglomeration. This study revealed the first evidence for the presence of potential plastic deformation capacity in Ni-YSZ composites under reducing environment.
Oxygen Reduction at the Surface and the Hetero-Interface of La-Sr-Co-O-Oxides Peer-reviewed

Atsushi Unemoto, Kazuki Nagao, Toshiya Tairako, Koji Amezawa, Tatsuya Kawada

IONIC AND MIXED CONDUCTING CERAMICS 7　28　(11)　59-70　2010

DOI： 10.1149/1.3495832 　

ISSN： 1938-5862
DEVELOPMENT OF IN-SITU MECHANICAL TESTING METHOD FOR SOFC COMPONENTS Peer-reviewed

Satoshi Watanabe, Kazuhisa Sato, Yohei Takeyama, Fumitada Iguchi, Keiji Yashiro, Toshiyuki Hashida, Junichiro Mizusaki, Tatsuya Kawada

PROCEEDINGS OF THE ASME 8TH INTERNATIONAL CONFERENCE ON FUEL CELL SCIENCE, ENGINEERING, AND TECHNOLOGY 2010, VOL 2　417-420　2010

DOI： 10.1115/FuelCell2010-33294 　
Effect of Y2O3 addition on the conductivity and elastic modulus of (CeO2)(1-x)(YO1.5)(x) Peer-reviewed

Sato, Kazuhisa Suzuki, Ken Yashiro, Tatsuya Kawada, Tatsuya Yugami, Hiroo Hashida, Toshiyuki Atkinson, Alan Mizusaki, Junichiro

Solid State Ion.　180　(20-22)　1220-1225　2009/08/17

DOI： 10.1016/j.ssi.2009.06.003 　

ISSN： 0167-2738
Defect structure analysis of B-site doped perovskite-type proton conducting oxide BaCeO3 Part 1: The defect concentration of BaCe0.9M0.1O3-delta (M = Y and Yb) Peer-reviewed

Masatsugu Oishi, Satoshi Akoshima, Keiji Yashiro, Kazuhisa Sato, Junichiro Mizusaki, Tatsuya Kawada

SOLID STATE IONICS　180　(2-3)　127-131　2009/03

DOI： 10.1016/j.ssi.2008.12.025 　

ISSN： 0167-2738
S0305-3-5 Evaluation of mechanical properties of electrode/electrolyte interface in SOFC by nano-indentation tests

The proceedings of the JSME annual meeting　2009　241-242　2009
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2009.1.0_241 　

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We investigated how the mechanical properties, i.e. the Young's modulus and the hardness, of the SOFC electrolyte were affected by cation diffusion from the electrode materials by using the nano-indentation method. In this work, the effect of Mn ion diffusion into (Y_2O_3)_<0.08>(ZrO_2)_<0.92>(YSZ) on its mechanical properties was discussed. From measurements with sintered compacts of Mn-doped YSZ, it was suggested that the Young's modulus of Mn-doped YSZ decreased with increasing the Mn content while the hardness was almost independent on the Mn content. In the diffusion couple of the single crystal YSZ and Mn_2O_3, decrease in the Young's modulus was observed in the vicinity of the interface depending on the Mn content. These results indicated that cation diffusion form the electrode material possibly leads to the local degradation of mechanical properties of the SOFC electrolyte.
S0305-3-2 Investigation of Elastic Modulus and Internal Friction of SOFC Electrolytes at High Temperature Using Resonance Method

KUSHI Takuto, SATO Kazuhisa, UNEMOTO Atsushi, AMEZAWA Koji, KAWADA Tatsuya

The proceedings of the JSME annual meeting　2009　235-236　2009
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2009.1.0_235 　

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The Young's modulus, the shear modulus, the Poisson ratio and the internal friction of typical electrolyte materials for solid oxide fuel cells, (Gd_2O_3)_<0.05>(CeO_2)_<0.9>, (Sm_2O_3)_<0.05>(CeO_2)_<0.9>, (Y_2O_3)_<0.08>(ZrO_2)_<0.92>, (Y_2O_3)_<0.1>(ZrO_2)_<0.9>, (Sc_2O_3)_<0.1>(ZrO_2)_<0.9>, (Sc_2O_3)_<0.1>Ce_<0.01>(ZrO_2)_<0.89> were evaluated by a resonance method. The measurements were carried out from room temperature to 1273 K. The Young's modulus of (Gd_2O_3)_<0.05>(CeO_2)_<0.9> and (Sm_2O_3)_<0.05>(CeO_2)_<0.9> gradually decreased with increasing temperature as expected for the typical ceramics. However, the Young's modulus of the series of zirconia-based electrolyte drastically decreased in the temperature range between 573 K and 873 K, and correspondingly the internal friction increased. Such a characteristic temperature dependence of the mechanical properties was discussed in terms of phase change.
S0305-3-4 Effects of oxygen potential on mechanical properties of SOFC constituent ceramics

TAKEYAMA Yohei, SATO Kazuhisa, KAWADA Tatsuya, HASHIDA Toshiyuki, MIZUSAKI Junichiro

The proceedings of the JSME annual meeting　2009　239-240　2009
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2009.1.0_239 　

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The objective of this work is to study relationship between oxygen potential and mechanical properties of oxygen nonstoichiometric compound with Ce_<0.9>Gd_<0.1>O_<2-x>. Under high temperature and reducing conditions, oxygen content in Ce_<0.9>Gd_<0.1>O_<2-x> changes and oxygen defect is generated. Therefore Mechanical properties of Ce_<0.9>Gd_<0.1>O_<2-x> can change under such conditions. In our study, we developed new test apparatus for small punch test, which is able to measure mechanical properties under high temperature and reducing conditions. And several tests ran already with this new test apparatus. Advanced investigation would explain how mechanical properties behave in these conditions.
Composite Cathode of Perovskite-Related Oxides, (La,Sr)CoO3-delta/(La,Sr)(2)CoO4-delta, for Solid Oxide Fuel Cells Peer-reviewed

Keiji Yashiro, Takashi Nakamura, Maya Sase, Florian Hermes, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

ELECTROCHEMICAL AND SOLID STATE LETTERS　12　(9)　B135-B137　2009

DOI： 10.1149/1.3170903 　

ISSN： 1099-0062
Design Concept for the High Temperature Photoelectronic Devices Using SrTiO3 Peer-reviewed

Fumimasa Horikiri, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　156　(7)　P107-P113　2009

DOI： 10.1149/1.3129244 　

ISSN： 0013-4651
Investigation of high temperature elastic modulus and internal friction of SOFC electrolytes using resonance method Peer-reviewed

T. Kushi, K. Sato, A. Unemoto, K. Amezawa, T. Kawada

ECS Transactions　25　(2)　1673-1677　2009

DOI： 10.1149/1.3205705 　

ISSN： 1938-5862 1938-6737
Investigation on Oxygen Potential Distribution in a ZrO2-Based Solid Electrolyte by Using In-Situ Micro XAS Technique Peer-reviewed

K. Amezawa, T. Ina, Y. Orikasa, A. Unemoto, H. Watanabe, F. Iguchi, Y. Terada, T. Fukutsuka, T. Kawada, H. Yugami, Y. Uchimoto

SOLID OXIDE FUEL CELLS 11 (SOFC-XI)　25　(2)　345-348　2009

DOI： 10.1149/1.3205542 　

ISSN： 1938-5862
Electrochemical Analysis on Degradation of Ni-GDC Cermet Anode for SOFC Peer-reviewed

H. Watanabe, A. Unemoto, K. Amezawa, T. Kawada

SOLID OXIDE FUEL CELLS 11 (SOFC-XI)　25　(2)　1939-1944　2009

DOI： 10.1149/1.3205738 　

ISSN： 1938-5862
Hydrogen Permeation Properties in (Ce,Sr)PO4 Peer-reviewed

Atsushi Unemoto, Naoto Kitamura, Koji Amezawa, Tatsuya Kawada

ELECTROCHEMICAL AND SOLID STATE LETTERS　12　(3)　B43-B47　2009

DOI： 10.1149/1.3065962 　

ISSN： 1099-0062
Classification of Mechanical Failures of SOFC and Strategy for Evaluation of the Operational Margins Peer-reviewed

T. Kawada, S. Watanabe, S. Hashimoto, T. Sakamoto, A. Unemoto, M. Kurumatani, K. Sato, F. Iguchi, K. Yashiro, K. Amezawa, K. Terada, M. Kubo, H. Yugami, T. Hashida, J. Mizusaki

SOLID OXIDE FUEL CELLS 11 (SOFC-XI)　25　(2)　467-472　2009

DOI： 10.1149/1.3205556 　

ISSN： 1938-5862
Defect structure analysis of B-site doped perovskite-type proton conducting oxide BaCeO3 Part 2: The electrical conductivity and diffusion coefficient of BaCe0.9Y0.1O3-delta Peer-reviewed

Masatsugu Oishi, Satoshi Akoshima, Keiji Yashiro, Kazuhisa Sato, Junichiro Mizusaki, Tatsuya Kawada

SOLID STATE IONICS　179　(39)　2240-2247　2008/12

DOI： 10.1016/j.ssi.2008.08.005 　

ISSN： 0167-2738
Defect equilibrium and electron transport in the bulk of single crystal SrTi1-xNbxO3 (x=0.01, 0.001, 0.0002) Peer-reviewed

Fumimasa Horikiri, Naofumi Iizawa, LiQun Han, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

SOLID STATE IONICS　179　(40)　2335-2344　2008/12

DOI： 10.1016/j.ssi.2008.10.001 　

ISSN： 0167-2738
Oxygen nonstoichiometry and defect structure analysis of B-site mixed perovskite-type oxide (La, Sr)(Cr, M)O3-delta (M = Ti, Mn and Fe) Peer-reviewed

Masatsugu Oishi, Keiji Yashiro, Kazuhisa Sato, Junichiro Mizusaki, Tatsuya Kawada

JOURNAL OF SOLID STATE CHEMISTRY　181　(11)　3177-3184　2008/11

DOI： 10.1016/j.jssc.2008.08.015 　

ISSN： 0022-4596
Fabrication of Yttria-Stabilized Zirconia Thin Film Under Room Temperature Atmospheric Pressure Conditions Peer-reviewed

Tatsuya Sone, Kazuhisa Sato, Keiji Yashiro, Kazuhiro Ogawa, Tatsuya Kawada, Tsunemoto Kuriyagawa, Toshiyuki Hashida, Junichiro Mizusaki

Proceedings of the 3rd JSME/ASME International Conference on Material and Processing　2008/10
Slow relaxation kinetics of Sr(Zr,Y)O-3 in wet atmosphere Peer-reviewed

Takao Kudo, Keiji Yashiro, Hiroshige Matsumoto, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

SOLID STATE IONICS　179　(21-26)　851-854　2008/09

DOI： 10.1016/j.ssi.2008.02.011 　

ISSN： 0167-2738
Oxygen nonstoichiometry of the perovskite-type oxides BaCe0.9M0.1O3-delta (M=Y, Yb, Sm, Tb, and Nd) Peer-reviewed

Masatsugu Oishi, Keiji Yashiro, Kazuhisa Sato, Junichiro Mizusaki, Naoto Kitamura, Koji Amezawa, Tatsuya Kawada, Yoshiharu Uchimoto

SOLID STATE IONICS　179　(15-16)　529-535　2008/06

DOI： 10.1016/j.ssi.2008.03.038 　

ISSN： 0167-2738
in situマイクロXAFS測定を用いたSOFCカソードにおける酸素還元反応機構の解明

雨澤浩史, 佐瀬摩耶, 渡邉秀貴, 宇根本篤, 川田達也, 折笠有基, 伊奈稔哲, 内本喜晴, 寺田靖子

Nanotechnology　2　2008/03
Enhancement of oxygen exchange at the hetero interface of (La,Sr)CoO3/(La,Sr)(2)CoO4 in composite ceramics Peer-reviewed

Maya Sase, Keiji Yashiro, Kazuhisa Sato, Junichiro Mizusaki, Tatsuya Kawada, Natsuko Sakai, Katsuhiko Yamaji, Tenihisa Horita, Harumi Yokokawa

SOLID STATE IONICS　178　(35-36)　1843-1852　2008/02

DOI： 10.1016/j.ssi.2007.11.039 　

ISSN： 0167-2738
1242 Fabrication and Evaluation of Functional Oxide Thin Film by using Powder Jet Deposition Method

SATO Kazuhisa, SONE Tatsuya, YASHIRO Keiji, OGAWA Kazuhiro, KAWADA Tatsuya, KURIYAGAWA Tsunemoto, HASHIDA Toshiyuki, MIZUSAKI Junichiro

The proceedings of the JSME annual meeting　2008　329-330　2008
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2008.6.0_329 　

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Powder Jet Deposition (PJD) method is one of the film forming technique& Ceramics films can be fabricated by this method Ytariastabilized zirconia (YSZ) thin films were deposited on various substrates by PJD method YSZ thin film was fabricated in systemically changed substrates, particle sizes and carrier gas pressures. The microstructures of YSZ films were observed by scanning electron microscope (SEM). From this study results, the amount of deposition rate by PJD method varies according to substrate hardness and powder size. Similarly, the film structures are affected by substrate and powder size. Additionally, the electrical conductivity of YSZ film on Al_2O_3 substrate was measured as a function of temperature using impedance and two-probe A.C. method From this measurement, the amount of this film's electrical conductivity is good agreement from other studies of YSZ bulks. This result shows probability of application to high temperature ceramics devices such as Solid Oxide Fuel Cells (SOFCs), gas sensors.
Nonlinear analysis of the oxygen surface reaction and thermodynamic behavior of La1-xSrxCoO3-δ Peer-reviewed

A. T. DeMartini, A. Unemoto, T. Kawada, S. B. Adler

ECS Transactions　16　(51)　47-67　2008

DOI： 10.1149/1.3242221 　

ISSN： 1938-5862 1938-6737
Determination of the Reaction Zone in Gadolinia-Doped Ceria Anode for Solid Oxide Fuel Cell Peer-reviewed

Takashi Nakamura, Keiji Yashiro, Atsushi Kaimai, Takanori Otake, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　155　(12)　B1244-B1250　2008

DOI： 10.1149/1.2975322 　

ISSN： 0013-4651
Enhancement of oxygen surface exchange at the hetero-interface of (La,Sr)CoO(3)/(La,Sr)(2)CoO(4) with PLD-Layered films Peer-reviewed

M. Sase, F. Hermes, K. Yashiro, K. Sato, J. Mizusaki, T. Kawada, N. Sakai, H. Yokokawa

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　155　(8)　B793-B797　2008

DOI： 10.1149/1.2928612 　

ISSN： 0013-4651
Electrochemical behaviors of mixed conducting oxide anodes for solid oxide fuel cell Peer-reviewed

Takashi Nakamura, Tsuneyuki Kobayashi, Keiji Yashiro, Atsushi Kaimai, Takanori Otake, Kazuhisa Sato, Junichiro Mizusaki, Tatsuya Kawada

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　155　(6)　B563-B569　2008

DOI： 10.1149/1.2901047 　

ISSN： 0013-4651
Hydrogen permeability and electrical properties in oxide composites Peer-reviewed

Atsushi Unemoto, Atsushi Kaimai, Kazuhisa Sato, Keiji Yashiro, Hiroshige Matsumoto, Junichiro Mizusaki, Koji Amezawa, Tatsuya Kawada

SOLID STATE IONICS　178　(31-32)　1663-1667　2008/01

DOI： 10.1016/j.ssi.2007.11.001 　

ISSN： 0167-2738
Electrical properties of Nb-doped SrTiO3 ceramics with excess TiO2 for SOFC anodes and interconnects Peer-reviewed

Fumimasa Horikiri, LiQun Han, Naofumi Iizawa, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　155　(1)　B16-B20　2008

DOI： 10.1149/1.2799733 　

ISSN： 0013-4651
Electronic and local structures of La1-x SrxCoO 3-δ studied by in-situ micro XAS measurements Peer-reviewed

Koji Amezawa, Yuki Orikasa, Toshiaki Ina, Atsushi Unemoto, Maya Sase, Hidetaka Watanabe, Tomokazu Fukutsuka, Tatsuya Kawada, Yasuko Terada, Yoshiharu Uchimoto

ECS Transactions　13　(26)　161-164　2008

DOI： 10.1149/1.3050388 　

ISSN： 1938-5862 1938-6737
Proton-electron mixed conduction properties in (Ce,Sr)PO4 Peer-reviewed

A. Unemoto, N. Kitamura, K. Amezawa, T. Kawada

ECS Transactions　13　(26)　337-345　2008

DOI： 10.1149/1.3050405 　

ISSN： 1938-5862 1938-6737
X-ray absorption spectroscopic studies on electronic structure in La 0.6Sr0.4Co0.8Fe0.2O 3-δ perovskite-type oxides Peer-reviewed

Yuki Orikasa, Toshiaki Ina, Tomokazu Fukutsuka, Koji Amezawa, Tatsuya Kawada, Yoshiharu Uchimoto

ECS Transactions　13　(26)　201-205　2008

DOI： 10.1149/1.3050392 　

ISSN： 1938-5862 1938-6737
Studies on defect structures of (La,Sr)2NiO4 by using X-ray absorption spectroscopy Peer-reviewed

Toshiaki Ina, Yuki Orikasa, Tomokazu Fukutsuka, Koji Amezawa, Tatsuya Kawada, Yoshiharu Uchimoto

ECS Transactions　13　(26)　195-200　2008

DOI： 10.1149/1.3050391 　

ISSN： 1938-5862 1938-6737
Electronic properties and oxygen nonstoichiometry of mixed-conducting oxide La1-xSrxCoO3-δ thin films at high temperature Peer-reviewed

D. Hemmi, K. Iwamoto, N. Hirai, M. Sase, A. Unemoto, T. Nakamura, F. Horikiri, Y. Mori, K. Sato, K. Yashiro, T. Kawada, J. Mizusaki

ECS Transactions　16　(51)　311-316　2008

DOI： 10.1149/1.3242245 　

ISSN： 1938-5862 1938-6737
SOFCモデル電極のマイクロXANES測定

川田達也, 耒順秋, 北村尚斗, 雨澤浩史, 内本喜晴, 宇根本篤, 開米篤志, 寺田靖子

Nanotechnology in SPring-8　9　141-145　2007/11
Surface reaction of hydrogen on a palladium alloy membrane under co-existence of H2O, CO, CO2 or CH4 Peer-reviewed

Atsushi Unemoto, Atsushi Kaimai, Kazuhisa Sato, Takanori Otake, Keiji Yashiro, Junichiro Mizusaki, Tatsuya Kawada, Tatsuya Tsuneki, Yoshinori Shirasaki, Isamu Yasuda

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY　32　(16)　4023-4029　2007/11

DOI： 10.1016/j.ijhydene.2007.04.030 　

ISSN： 0360-3199
The effect of co-existing gases from the process of steam reforming reaction on hydrogen permeability of palladium alloy membrane at high temperatures Peer-reviewed

Atsushi Unemoto, Atsushi Kaimai, Kazuhisa Sato, Takanori Otake, Keiji Yashiro, Junichiro Mizusaki, Tatsuya Kawada, Tatsuya Tsuneki, Yoshinori Shirasaki, Isamu Yasuda

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY　32　(14)　2881-2887　2007/09

DOI： 10.1016/j.ijhydene.2007.03.037 　

ISSN： 0360-3199
固体酸化物燃料電池の損傷に及ぼす化学膨張の影響 Peer-reviewed

佐藤一永, 八代圭司, 橋田俊之, 川田達也, 湯上浩雄, 水崎純一郎

日本機械学会論文集　74　(737)　68-74　2007/04
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/kikaia.74.68 　

ISSN： 0387-5008

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The influence of chemically-induced expansion on the fracture damage of a ceria based solid oxide fuel cell (SOFC) was investigated by using numerical stress analyses. The single cell examined in this study was composed of electrolyte [(CeO₂) _0.8 (SmO_1.5) _0.2], anode (Cermets of NiO-20 SDC), and cathode (La_0.6Sr_0.4Co_0.2Fe_0.8O₃), respectively. The finite element method was employed to calculate the residual stress, thermal stresses, and chemically-induced expansion stresses for the single cell. The residual and thermal stresses were calculated much smaller than the fracture strength of the individual components of the single cell. On the other hand, the chemically-induced expansion stresses were shown to remarkably increase for the temperature range greater than 973 K and accounted their magnitude for the primary part of the induced stress. It was shown from the stress analysis that the maximum stress induced in the single cell exceeded the fracture strength of the individual components at the onset of the fracture damage detect by acoustic emission method. The above-mentioned calculation results suggest that the chemically-induced expansion should be taken into account for the use of ceria based ceramics materials in SOFCs.
水素分離用ハ_ラシ_ウム-銀合金膜の表面反応速度へ及ほ_す共存カ_スの影響 Peer-reviewed

宇根本篤, 開米篤志, 佐藤一永, 大竹隆憲, 八代圭司, 水崎純一郎, 川田達也, 常木達也, 白崎義則, 大田洋州

水素エネルギーシステム　32　(2)　34-39　2007/04
Publisher:
ISSN： 1341-6995
高温電気化学マイクロXAFSによる高性能SOFC電極の最適設計

川田達也, 雨澤浩史, 宇根本篤, 開米篤志, 折笠有基, 内本喜晴, 寺田靖子

Nanotechnology　1　22-23　2007/03
Oxygen nonstoichiometry of B-site doped LaCrO3 Peer-reviewed

Masatsugu Oishi, Keiji Yashiro, Jeong-Oh Hong, Yutaka Nigara, Tatsuya Kawada, Junichiro Mizusaki

SOLID STATE IONICS　178　(3-4)　307-312　2007/02

DOI： 10.1016/j.ssi.2006.12.018 　

ISSN： 0167-2738
Measurement of oxygen exchange kinetics on thin-film La0.6Sr0.4CoO3-delta using nonlinear electrochemical impedance spectroscopy Peer-reviewed

Jamie R. Wilson, Maya Sase, Tatsuya Kawada, Stuart B. Adler

ELECTROCHEMICAL AND SOLID STATE LETTERS　10　(5)　B81-B86　2007

DOI： 10.1149/1.2710178 　

ISSN： 1099-0062
Reliability evaluation of SOFC under simulated operating condition Peer-reviewed

K. Sato, N. Imanaka, K. Fukui, M. Numao, S. Kyotani, K. Yashiro, T. Kawada, T. Hashida, J. Mizusaki

ECS Transactions　7　(1)　455-458　2007

DOI： 10.1149/1.2729123 　

ISSN： 1938-5862 1938-6737
Promotion of Oxygen Surface Reaction at the Hetero-Interface of (La,Sr)CoO3/(La,Sr)(2)CoO4 Peer-reviewed

M. Sase, F. Hermes, T. Nakamura, K. Yashiro, K. Sato, J. Mizusaki, T. Kawada, N. Sakai, K. Yamaji, T. Horita, H. Yokokawa

SOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2　7　(1)　1055-1060　2007

DOI： 10.1149/1.2729202 　

ISSN： 1938-5862
Microstructural changes of Ni/YSZ cermet under repeated redox reaction in environmental scanning electron microscope (ESEM) Peer-reviewed

Y. Nakagawa, K. Yashiro, K. Sato, T. Kawada, J. Mizusaki

ECS Transactions　7　(1)　1373-1380　2007

DOI： 10.1149/1.2729241 　

ISSN： 1938-5862 1938-6737
Electrochemical behaviors of mixed conducting oxide anode for SOFC Peer-reviewed

Takashi Nakamura, Tsuneyuki Kobayasi, Keiji Yashiro, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

ECS Transactions　7　(1)　1601-1607　2007

DOI： 10.1149/1.2729267 　

ISSN： 1938-5862 1938-6737
Electrical properties of Nb-doped SrTiO3 ceramics with excess TiO2 for anodes and interconnects of SOFCs Peer-reviewed

Fumimasa Horikiri, Li Qun Han, Naofumi Iizawa, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

ECS Transactions　7　(1)　1639-1644　2007

DOI： 10.1149/1.2729272 　

ISSN： 1938-5862 1938-6737
ELECTROCHEMICAL CHARACTARIZATION AND IDENTIFICATION OF REACTION SITES IN OXIDE ANODES Peer-reviewed

T. Nakamura, K. Yashiro, A. Kaimai, T. Otake, K. Sato, G. J. Park, T. Kawada, J. Mizusaki

ADVANCES IN SOLID OXIDE FUEL CELLS II　27　(4)　193-198　2007

ISSN： 0196-6219
Electrode Performance at Hetero-interface of Perovskite-related Oxides, (La, Sr)CoO3-delta/(La, Sr)(2)CoO4-delta Peer-reviewed

K. Yashiro, T. Nakamura, M. Sase, F. Hermes, K. Sato, T. Kawada, J. Mizusaki

SOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2　7　(1)　1287-1292　2007

DOI： 10.1149/1.2729230 　

ISSN： 1938-5862
Electrochemical Behaviors of Mixed Conducting Oxide Anode for SOFC Peer-reviewed

Takashi Nakamura, Tsuneyuki Kobayasi, Keiji Yashiro, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

SOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2　7　(1)　1601-1607　2007

DOI： 10.1149/1.2729267 　

ISSN： 1938-5862
A concept of chemical potential pumping effect of nonstoichiometric oxides and the NOx sensing mechanism of the perovskite-type La0.5Sr0.5FeO3 Peer-reviewed

Junichiro Mizusaki, Hiroyuki Ohama, Keiji Yashiro, Tatsuya Kawada

ELECTROCHEMISTRY　74　(12)　949-955　2006/12

DOI： 10.5796/electrochemistry.74.949 　

ISSN： 1344-3542
Experimental approach to the dynamic behaviors of high temperature electrodes Peer-reviewed

T. Kawada, M. Sase, H. Hosoi, K. Yashiro, J. Mizusaki, N. Sakai, T. Horita, K. Yamaji, H. Yokokawa, M. Rai, N. Kitamura, K. Amezawa, Y. Uchimoto

Proceedings of 16th Iketani Conference　633-636　2006/11
Microscopic observation of oxygen reaction pathway on high temperature electrode materials Peer-reviewed

Tatsuya Kawada, Maya Sase, Masakazu Kudo, Keiji Yashiro, Kazuhisa Sato, Junichiro Mizusaki, Natsuko Sakai, Teruhisa Horita, Katsuhiko Yamaji, Harumi Yokokawa

SOLID STATE IONICS　177　(35-36)　3081-3086　2006/11

DOI： 10.1016/j.ssi.2006.08.005 　

ISSN： 0167-2738
The influence of grain boundary on the conductivity of donor doped SrTiO3 Peer-reviewed

Fumimasa Horikiri, Li Qun Han, Atsushi Kaimai, Takanori Otake, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

SOLID STATE IONICS　177　(26-32)　2555-2559　2006/10

DOI： 10.1016/j.ssi.2006.03.023 　

ISSN： 0167-2738
Electrode reaction and microstructure of La0.6Sr0.4CoO3-delta thin films Peer-reviewed

Maya Sase, Junji Suzuki, Keiji Yashiro, Takanori Otake, Atsushi Kaimai, Tatsuya Kawada, Junichiro Mizusaki, Hiroo Yugami

SOLID STATE IONICS　177　(19-25)　1961-1964　2006/10

DOI： 10.1016/j.ssi.2006.01.018 　

ISSN： 0167-2738
Nonstoichiometry of the perovskite-type solid solution La0.9Ca0.1Cr1-yAlyO3-delta Peer-reviewed

Junichiro Mizusaki, Mamoru Hasegawa, Keiji Yashiro, Hiroshige Matsumoto, Tatsuya Kawada

SOLID STATE IONICS　177　(19-25)　1925-1928　2006/10

DOI： 10.1016/j.ssi.2006.06.001 　

ISSN： 0167-2738
Emission characteristics of F- ions into vacuum from CaF2 Peer-reviewed

Takaaki Sakai, Atsushi Kaimai, Takanori Otake, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki, Masateru Nishioka

SOLID STATE IONICS　177　(19-25)　1601-1605　2006/10

DOI： 10.1016/j.ssi.2006.05.014 　

ISSN： 0167-2738

eISSN： 1872-7689
Continuous emission of O- ions into a vacuum from a bare surface of yttria-stabilized zirconia at elevated temperatures Peer-reviewed

Yukio Fujiwara, Takaaki Sakai, Atsushi Kaimai, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A　24　(5)　1818-1822　2006/09

DOI： 10.1116/1.2232541 　

ISSN： 0734-2101
Tracking the onset of damage mechanism in ceria-based solid oxide fuel cells under simulated operating conditions Peer-reviewed

K Sato, H Omura, T Hashida, K Yashiro, H Yugami, T Kawada, J Mizusaki

JOURNAL OF TESTING AND EVALUATION　34　(3)　246-250　2006/05

ISSN： 0090-3973
Evaluation of Surface Reaction of Hydrogen on a Palladium-Silver Membrane under Co-Existence of H2O, CO, CO2 or CH4 Peer-reviewed

A. Unemoto, N. Hirai, A. Kaimai, K. Sato, T. Otake, K. Yashiro, J. Mizusaki, T. Kawada, T. Tsuneki, Y. Shirasaki, I. Yasuda

Proceedings of the 16th Iketani Conference: Masuko Symposium　839-842　2006/04
Hydrogen Permeability of Palladium Alloy Membrane at High Temperatures in the Impurity Gases Co-Existing Atmospheres

A. Unemoto, A. Kaimai, T. Otake, K. Yashiro, T. Kawada, J. Mizusaki, T. Tsuneki, I. Yasuda

Proceedings of the 16th World Hydrogen Energy Conference　2006/04
Characteristics of Damage and Fracture Process of Solid Oxide Fuel Cells under Simulated Operating Conditions by Using AE Method Peer-reviewed

Kazuhisa Sato, Toshiyuki Hashida, Hiroo Yugami, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

Progress in Acoustic Emission XIII, The Japanese Society for NDI　269-276　2006/04
SOFCモデル電極のマイクロXANES測定

川田達也, 耒順秋, 北村尚斗, 雨澤浩史, 内本喜晴, 佐藤一永, 開米篤志, 寺田靖子

Nanotechnology in SPring-8　8　156-160　2006/03
Emission characteristics of negative oxygen ions into vacuum from cerium oxide Peer-reviewed

T Sakai, Y Fujiwara, A Kaimai, K Yashiro, H Matsumoto, Y Nigara, T Kawada, J Mizusaki

JOURNAL OF ALLOYS AND COMPOUNDS　408　1127-1131　2006/02

DOI： 10.1016/j.jallcom.2004.12.125 　

ISSN： 0925-8388
Hydrogen separation using proton-conducting perovskites Peer-reviewed

H Matsumoto, T Shimura, H Iwahara, T Higuchi, K Yashiro, A Kaimai, T Kawada, J Mizusaki

JOURNAL OF ALLOYS AND COMPOUNDS　408　456-462　2006/02

DOI： 10.1016/j.jallcom.2004.12.093 　

ISSN： 0925-8388
改質ガスからの水素分離におけるパラジウム系合金の表面反応速度の評価

宇根本篤, 開米篤志, 佐藤一永, 大竹隆憲, 八代圭司, 川田達也, 水崎純一郎, 常木達也, 白崎義則, 安田勇

化学工学会研究発表講演要旨集　2006　748-748　2006
Publisher: 公益社団法人化学工学会
DOI： 10.11491/scej.2006f.0.748.0 　
Characteristics of Damage and Fracture Process of Solid Oxide Fuel Cells Under Simulated Operating Conditions By Using AE Method Peer-reviewed

Kazuhisa Sato, Toshiyuki Hashida, Hiroo Yugami, Kenji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

Journal of Acoustic Emission　24　215-221　2006
Effect of Mechanical Load on the Electrical Property of Yttria-Stabilized Zirconia, Electrochemistry and Thermodynamics on Materials Processing for Sustainable Production Peer-reviewed

K. Sato, R.Narumi, K.Yashiro, T.Kawada, H.Yugami, T.Hashida, J.Mizusaki

Masko Symposium　823-827　2006
A New Method for Evaluating Degradation of Solid Oxide Fuel Cell under Operating Conditions by Combining the Electrochemical Measurement with Non-Destructive Test Peer-reviewed

Kazuhisa Sato, Shintaro Kyotani, Toshiyuki Hashida, Hirokazu Moriya, Tatsuya Kawada, Keiji Yashiro, Takashi Nakamura, Hiroo Yugami, Junichiro Mizusaki

Proceedings of Asian Symposium on Materials and Processing 2006　2006　132-136　2006
Publisher: The Japan Society of Mechanical Engineers

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The purpose of present research is to estimate the degradation mechanism of solid oxide fuel cell (SOFC) by using combining non-destructive test and electrochemical measurement during loading test Mechanical degradation and chemically degradation were investigated by acoustic emission (AE) measurement system and electrochemical measurement,respectively. In the investigation of fracture process with AE amplitude distributions, high amplitude signal, middle amplitude signal and low amplitude signal correspond to vertical craking, delamination in the cathode, and vertical cracking in the elctrolyte respectively. It was demonstrated that the AE method enabled us to detect the above-mentioned mechanical damage and to determine the condition for the onset of the damage in the single cell.
Nb-doped SrTiO3-based high-temperature Schottky solar cells Peer-reviewed

F Horikiri, T Ichikawa, LQ Han, A Kaimai, K Yashiro, H Matsumoto, T Kawada, J Mizusaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS　44　(11)　8023-8026　2005/11

DOI： 10.1143/JJAP.44.8023 　

ISSN： 0021-4922
Application of FT-IR for in situ investigation of high temperature electrode reactions Peer-reviewed

T Murai, K Yashiro, A Kaimai, T Otake, H Matsumoto, T Kawada, J Mizusaki

SOLID STATE IONICS　176　(31-34)　2399-2403　2005/10

DOI： 10.1016/j.ssi.2005.06.029 　

ISSN： 0167-2738

eISSN： 1872-7689
Catalytic chemical potential shift on the surface of nonstoichiometric oxides under non-equilibrium gas atmosphere Peer-reviewed

K Yashiro, S Onuma, M Sase, A Kaimai, T Otake, H Matsumoto, T Kawada, J Mizusaki

SOLID STATE IONICS　176　(31-34)　2411-2416　2005/10

DOI： 10.1016/j.ssi.2005.06.027 　

ISSN： 0167-2738
Electronic structure of protonic conductor SrZr0.90M0.10O3 (M=Y3+, Sc3+) probed by soft-X-ray spectroscopy Peer-reviewed

T Higuchi, T Tsukamoto, H Matsumoto, T Shimura, K Yashiro, T Kawada, J Mizusaki, S Shin, T Hattori

SOLID STATE IONICS　176　(31-34)　2435-2438　2005/10

DOI： 10.1016/j.ssi.2005.06.030 　

ISSN： 0167-2738

eISSN： 1872-7689
Mechanical damage evaluation of solid oxide fuel cells under simulated operating conditions Peer-reviewed

K Sato, T Hashida, K Yashiro, H Yugami, T Kawada, J Mizusaki

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　113　(1320)　562-564　2005/08

DOI： 10.2109/jcersj.113.562 　

ISSN： 1882-0743

eISSN： 1348-6535
Oxygen partial pressure dependence of creep on yttria-doped ceria ceramics Peer-reviewed

F Iguchi, Y Endo, T Ishida, T Yokobori, H Yugami, T Otake, T Kawada, J Mizusaki

SOLID STATE IONICS　176　(5-6)　641-644　2005/02

DOI： 10.1016/j.ssi.2004.09.005 　

ISSN： 0167-2738
Interfacial reaction and electrochemical properties of dense (La,Sr) CoO3-delta cathode on YSZ(100) Peer-reviewed

M Sase, D Ueno, K Yashiro, A Kaimai, T Kawada, J Mizusaki

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS　66　(2-4)　343-348　2005/02

DOI： 10.1016/j.jpcs.2004.06.057 　

ISSN： 0022-3697
Protonic-electronic mixed conduction and hydrogen permeation in BaCe0.9-xY0.1RuxO3-alpha Peer-reviewed

H Matsumoto, T Shimura, O Higuchi, H Tanaka, K Katahira, T Otake, T Kudo, K Yashiro, A Kaimai, T Kawada, J Mizusaki

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　152　(3)　A488-A492　2005

DOI： 10.1149/1.1852442 　

ISSN： 0013-4651

eISSN： 1945-7111
Mixed protonic-electronic conduction properties of SrZr0.9-xY0.1RuxO3-alpha Peer-reviewed

H Matsumoto, T Shimura, T Higuchi, T Otake, Y Sasaki, K Yashiro, A Kaimai, T Kawada, J Mizusaki

ELECTROCHEMISTRY　72　(12)　861-864　2004/12

ISSN： 1344-3542
Chemical stability of La1-xSrxCrO3 in oxidizing atmospheres Peer-reviewed

S Miyoshi, S Onuma, A Kaimai, H Matsumoto, K Yashiro, T Kawada, J Mizusaki, H Yokokawa

JOURNAL OF SOLID STATE CHEMISTRY　177　(11)　4112-4118　2004/11

DOI： 10.1016/j.jssc.2004.04.054 　

ISSN： 0022-4596
Electrical properties and defect structure of niobia-doped ceria Peer-reviewed

K Yashiro, Suzuki, I, A Kaimai, H Matsumoto, Y Nigara, T Kawada, J Mizusaki, J Sfeir, J Van Herle

SOLID STATE IONICS　175　(1-4)　341-344　2004/11

DOI： 10.1016/j.ssi.2004.01.066 　

ISSN： 0167-2738
Electrical properties of the surface layer formed on the Nb-doped SrTiO3 single crystal at low temperatures Peer-reviewed

LQ Han, A Kaimai, K Yashiro, Y Nigara, T Kawada, J Mizusaki, PP Chen, CJ Zhong, T Higuchi

SOLID STATE IONICS　175　(1-4)　431-435　2004/11

DOI： 10.1016/j.ssi.2004.03.046 　

ISSN： 0167-2738
Hydrogen isotope sensor using high temperature proton conductors Peer-reviewed

H Matsumoto, H Hayashi, T Shimura, K Amezawa, T Otake, K Yashiro, Y Nigara, A Kaimai, T Kawada, H Iwahara, J Mizusaki

SOLID STATE IONICS　175　(1-4)　491-495　2004/11

DOI： 10.1016/j.ssi.2004.01.068 　

ISSN： 0167-2738
In situ XRD study on oxygen-excess LaMnO3 Peer-reviewed

S Miyoshi, A Kaimai, H Matsumoto, K Yashiro, Y Nigara, T Kawada, J Mizusaki

SOLID STATE IONICS　175　(1-4)　383-386　2004/11

DOI： 10.1016/j.ssi.2004.01.082 　

ISSN： 0167-2738
Oxygen nonstoichiometry of the perovskite-type oxide la(1-x)Ca(x)CrO(3-delta) (x=0.1, 0.2, 0.3) Peer-reviewed

S Onuma, K Yashiro, S Miyoshi, A Kaimai, H Matsumoto, Y Nigara, T Kawada, J Mizusaki, K Kawamura, N Sakai, H Yokokawa

SOLID STATE IONICS　174　(1-4)　287-293　2004/10

DOI： 10.1016/j.ssi.2004.07.037 　

ISSN： 0167-2738

eISSN： 1872-7689
Electronic structure in the band-gap region of protonic conductor SrZr0.90Y0.10O3-delta Peer-reviewed

T Higuchi, H Matsumoto, T Shimura, K Yashiro, T Kawada, J Mizusaki, S Shin, T Tsukamoto

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS　43　(8A)　5419-5420　2004/08

DOI： 10.1143/JJAP.43.5419 　

ISSN： 0021-4922
High temperature Schottky barrier on n-type SrTiO3 and its sensitivity to ambient gases Peer-reviewed

T Kawada, T Ichikawa, LQ Han, K Yashiro, H Matsumoto, J Mizusaki

JOURNAL OF ELECTROCERAMICS　13　(1-3)　715-719　2004/07

DOI： 10.1007/s10832-004-5181-0 　

ISSN： 1385-3449
Electronic structure of protonic conductor BaCe0.90Y0.10O3-delta probed by soft-X-ray spectroscopy Peer-reviewed

T Higuchi, H Matsumoto, T Shimura, K Yashiro, T Kawada, J Mizusaki, S Shin, T Tsukamoto

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS　43　(6A)　L731-L734　2004/06

DOI： 10.1143/JJAP.43.L731 　

ISSN： 0021-4922
Hydrogen permeability of YSZ single crystals at high temperatures Peer-reviewed

Y Nigara, K Yashiro, JO Hong, T Kawada, J Mizusaki

SOLID STATE IONICS　171　(1-2)　61-67　2004/06

DOI： 10.1016/S0167-2738(03)00274-1 　

ISSN： 0167-2738
New in situ Characterization of SOFC Electrode

Tatsuya Kawada, Keiji Yashiro

Electrochemistry　72　(5)　343-348　2004/05
Publisher:
ISSN： 1344-3542
In situ Fourier Transform Infrared Spectroscopy of Oxygen Species on Pt/YSZ Electrodes at High Temperature Peer-reviewed

T. Murai, K. Yashiro, A. Kaimai, H. Matsumoto, Y. Nigara, T. Kawada, J. Mizusaki

Transactions of the Materials Research Society of Japan　29　(8)　3439-3442　2004/04
Tunneling Current Through the Surface Layer Formed on The Nb-doped SrTiO3 Single Crystal Peer-reviewed

L. Q. Han, P. P. Chen, C. J. Zhong, T. Higuchi, A. Kaimai, K. Yashiro, Y. Nigara, T. Kawada, J. Mizusaki

Solid State Ionics 175　431-435　2004
Mixed protonic-electronic conduction in transition-metal-doped perovskite-type oxides Peer-reviewed

H Matsumoto, T Otake, T Kudo, Y Sasaki, K Yashiro, A Kaimai, T Kawada, J Mizusaki, T Shimura, T Higuchi, K Katahira

SOLID STATE IONICS: THE SCIENCE AND TECHNOLOGY OF IONS IN MOTION　213-220　2004

DOI： 10.1142/9789812702586_0021 　
Hydrogen separation from reformed gases using high-temperature proton conductors Peer-reviewed

H Matsumoto, Kudo, I, T Otake, F Horikiri, A Kaimai, K Yashiro, T Kawada, J Mizusaki, T Shimura, H Iwahara, M Watanabe

SOLID STATE IONICS: THE SCIENCE AND TECHNOLOGY OF IONS IN MOTION　373-380　2004

DOI： 10.1142/9789812702586_0040 　
Effect of electrochemical polarization on the emission of O- ions from the surface of YSZ Peer-reviewed

Y Fujiwara, T Sakai, A Kaimai, K Yashiro, Y Nigara, T Kawada, J Mizusaki

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　150　(11)　E543-E547　2003/11

DOI： 10.1149/1.1611495 　

ISSN： 0013-4651
Lattice expansion upon reduction of perovskite-type LaMnO3 with oxygen-deficit nonstoichiometry Peer-reviewed

S Miyoshi, JO Hong, K Yashiro, A Kaimai, Y Nigara, K Kawamura, T Kawada, J Mizusaki

SOLID STATE IONICS　161　(3-4)　209-217　2003/08

DOI： 10.1016/S0167-2738(03)00281-9 　

ISSN： 0167-2738
Surface potential distribution at different grain boundary types in SrTiO3:Nb studied by scanning Kelvin probe microscopy

Hiroo Yugami, Tomohiro Yoneta, Noriko Sata, Sadahiro Tsurekawa, Fumitada Iguchi, Tatsuya Kawada, Junichiro Mizusaki

Abstracts of the 14th international conference on solid state ionics (SSI-14)　416-416　2003/07
Nonstoichiometry of Ce1-xYxO2-0.5x-delta (X=0.1, 0.2) Peer-reviewed

T Otake, H Yugami, K Yashiro, Y Nigara, T Kawada, J Mizusaki

SOLID STATE IONICS　161　(1-2)　181-186　2003/07

DOI： 10.1016/S0167-2738(02)00873-1 　

ISSN： 0167-2738
A CONCEPT OF CHEMICAL POTENTIAL PUMPING EFFECT AND THE Nox SENSING MECHANISM OF PEROVSKITE-TYPE OXIDE MIXED CONDUCTORS Peer-reviewed

Junichiro Mizusaki, K. Yashiro, T. Kawada, H. Ohama

Solid-State Ionic Devices III　236-251　2003/04
Effect of Nonstoichiometry on the Volume of LaMnO3+d Based Perovskite Oxides Peer-reviewed

Shogo Miyoshi, J.-O. Hong, K. Yashiro, A. Kaimai, Y. Nigara, T. Kawada, J. Mizusaki, K. Kawamura

Solid-State Ionic Devices III　372-282　2003/04
Solid Oxide Fuel Cells with a zirconia electrolyte Peer-reviewed

Junichiro Mizusaki, Tatsuya Kawada, Keiji Yashiro

FC report　21　168-174　2003/04
Hydrogen permeability in (CeO2)(0.9)(GdO1.5)(0.1) at high temperatures Peer-reviewed

Y Nigara, K Yashiro, Kawada, T, J Mizusaki

SOLID STATE IONICS　159　(1-2)　135-141　2003/03

DOI： 10.1016/S0167-2738(02)00919-0 　

ISSN： 0167-2738
An oxygen negative ion source of a new concept using solid oxide electrolytes Peer-reviewed

Y Fujiwara, A Kaimai, JO Hong, K Yashiro, Y Nigara, T Kawada, J Mizusaki

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　150　(2)　E117-E124　2003/02

DOI： 10.1149/1.1536995 　

ISSN： 0013-4651
Determination of proton and oxygen movements in solid oxides by the tracer gases exchange technique and secondary ion mass spectrometry Peer-reviewed

Teruhisa Horita, Katsuhiko Yamaji, Natsuko Sakai, Yueping Xiong, Tohru Kato, Harumi Yokokawa, Tatsuya Kawada

Applied Surface Science　203-204　634-638　2003/01/15

DOI： 10.1016/S0169-4332(02)00781-X 　

ISSN： 0169-4332
Oxygen partial pressure dependence of creep for yttria-doped ceria ceramics Peer-reviewed

H Yugami, Y Endo, T Yokobori, T Otake, T Kawada, J Mizusaki

SOLID OXIDE FUEL CELLS VIII (SOFC VIII)　2003　(7)　261-266　2003
In-situ measurement of oxygen potential around (La,Sr)MnO3/YSZ interface Peer-reviewed

T Kawada, M Kudoh, K Yashiro, A Kaimai, Y Nigara, J Mizusaki

SOLID OXIDE FUEL CELLS VIII (SOFC VIII)　2003　(7)　470-477　2003
Phase stability of La1-xCaxCrO3-delta in oxidizing atmosphere Peer-reviewed

S Onuma, S Miyoshi, K Yashiro, A Kaimai, K Kawamura, Y Nigara, T Kawada, J Mizusaki, N Sakai, H Yokokawa

JOURNAL OF SOLID STATE CHEMISTRY　170　(1)　68-74　2003/01

DOI： 10.1016/S0022-4596(02)00024-5 　

ISSN： 0022-4596
Situ observation of deposited carbon on anode for solid oxide fuel cells Peer-reviewed

K Yashiro, K Takeda, T Taura, T Otake, A Kaimai, Y Nigara, T Kawada, J Mizusaki

SOLID OXIDE FUEL CELLS VIII (SOFC VIII)　2003　(7)　714-719　2003
Electrical properties of the surface layer formed on the Nb-doped SrTiO3 single crystal Peer-reviewed

LQ Han, N Iizawa, Y Chiba, T Yoneta, A Kaimai, K Yashiro, H Yugami, Y Nigara, T Kawada, J Mizusaki

CERAMIC INTERFACES: PROPERTIES AND APPLICATIONS V　253　29-41　2003

DOI： 10.4028/www.scientific.net/KEM.253.29 　

ISSN： 1013-9826
Lattice creation and annihilation of LaMnO3+δ caused by nonstoichiometry change Peer-reviewed

Shogo Miyoshi, Jeong-Oh Hong, Keiji Yashiro, Atsushi Kaimai, Yutaka Nigara, Kenichi Kawamura, Tatsuya Kawada, Junichiro Mizusaki

Solid State Ionics　154-155　257-263　2002/12/02

DOI： 10.1016/S0167-2738(02)00441-1 　

ISSN： 0167-2738
Mass transport properties of Ce0.9Gd0.1O2-δ at the surface and in the bulk Peer-reviewed

K. Yashiro, S. Onuma, A. Kaimai, Y. Nigara, T. Kawada, J. Mizusaki, K. Kawamura, T. Horita, H. Yokokawa

Solid State Ionics　152-153　469-476　2002/12

DOI： 10.1016/S0167-2738(02)00375-2 　

ISSN： 0167-2738
Demonstration and stack concept of quick startup/shutdown SOFC (qSOFC) Peer-reviewed

K Yashiro, N Yamada, T Kawada, JO Hong, A Kaimai, Y Nigara, J Mizusaki

ELECTROCHEMISTRY　70　(12)　958-960　2002/12

ISSN： 1344-3542
Lattice creation and annihilation of LaMnO3+delta caused by nonstoichiometry change Peer-reviewed

S Miyoshi, JO Hong, K Yashiro, A Kaimai, Y Nigara, K Kawamura, T Kawada, J Mizusaki, J Mizusaki

SOLID STATE IONICS　154　257-263　2002/12

DOI： 10.1016/S0167-2738(02)00441-1 　

ISSN： 0167-2738
Mass transport properties of Ce0.9Gd0.1O2-delta at the surface and in the bulk Peer-reviewed

K Yashiro, S Onuma, A Kaimai, Y Nigara, T Kawada, J Mizusaki, K Kawamura, T Horita, H Yokokawa

SOLID STATE IONICS　152　469-476　2002/12

DOI： 10.1016/S0167-2738(02)00375-2 　

ISSN： 0167-2738
Determination of oxygen vacancy concentration in a thin film of La0.6Sr0.4CoO3-delta by an electrochemical method Peer-reviewed

T Kawada, J Suzuki, M Sase, A Kaimai, K Yashiro, Y Nigara, J Mizusaki, K Kawamura, H Yugami

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　149　(7)　E252-E259　2002/07

DOI： 10.1149/1.1479728 　

ISSN： 0013-4651
Emission characteristics of O- ions from a bare surface of yttria-stabilized zirconia (YSZ) at elevated temperatures Peer-reviewed

Y Fujiwara, A Kaimai, JO Hong, K Yashiro, Y Nigara, T Kawada, J Mizusaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS　41　(6A)　L657-L659　2002/06

DOI： 10.1143/JJAP.41.L657 　

ISSN： 0021-4922
Imaging of oxygen transport at SOFC cathode/electrolyte interfaces by a novel technique Peer-reviewed

T Horita, K Yamaji, N Sakai, XP Xiong, T Kato, H Yokokawa, T Kawada

JOURNAL OF POWER SOURCES　106　(1-2)　224-230　2002/04

DOI： 10.1016/S0378-7753(01)01017-5 　

ISSN： 0378-7753
Electric-Field Effect on the Surface Process of Platinum-Coated Yttria-Stabilized Zirconia Peer-reviewed

Yukio Fujiwara, Atsushi Kaimai, Jeong-Oh Hong, Keiji Yashiro, Yutaka Nigara, Tatsuya Kawada, Junichiro Mizusaki

Transactions of the Materials Research Society of Japan　27　(1)　85-88　2002/04
Impenance analysis of Gas electrode / solid electrolyte system Peer-reviewed

J.Mizusaki, Tatsuya Kawada, Keiji Yashiro, Maya Sase

Materials Science and Technology　39　(2)　63-68　2002/04
Publisher:
ISSN： 1347-4774
A concept and an experimental study on O- ion source using solid oxide electrolytes Peer-reviewed

Y Fujiwara, A Kaimai, JO Hong, K Yashiro, Y Nigara, T Kawada, J Mizusaki

HIGH TEMPERATURE MATERIALS, PROCEEDINGS　2002　(5)　185-199　2002
Lithium activities in lithium transition metal double oxide Peer-reviewed

K Kawamura, K Asano, S Nagano, A Kaimai, K Yashiro, Y Nigara, T Kawada, J Mizusaki

IONIC AND MIXED CONDUCTING CERAMICS IV　2001　(28)　272-279　2002
Defect equilibrium and transport properties of nb doped SrTiO3 Peer-reviewed

T Kawada, N Iizawa, LQ Han, K Yashiro, A Kaimai, Y Nigara, J Mizusaki

IONIC AND MIXED CONDUCTING CERAMICS IV　2001　(28)　296-305　2002
The atomic hydrogen permeability in (CeO2)(0.85)(CaO)(0.15) at high temperatures Peer-reviewed

Y Nigara, K Yashiro, T Kawada, J Mizusaki

SOLID STATE IONICS　145　(1-4)　365-370　2001/12

DOI： 10.1016/S0167-2738(01)00932-8 　

ISSN： 0167-2738
Electrical conductivities of CaO doped ZrO2-CeO2 solid solution system Peer-reviewed

Kenichi Kawamura, Kensuke Watanabe, Takahiro Hiramatsu, Atsushi Kaimai, Yutaka Nigara, Tatsuya Kawada, Junichiro Mizusaki

Solid State Ionics　144　(1-2)　11-18　2001/09/01

DOI： 10.1016/S0167-2738(01)00892-X 　

ISSN： 0167-2738
Property of (La, Ca)CrO3 for interconnect in solid oxide fuel cell (Part 2) - Durability Peer-reviewed

H Nishiyama, M Aizawa, N Sakai, H Yokokawa, T Kawada, M Dokiya

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　109　(6)　527-534　2001/06

DOI： 10.2109/jcersj.109.1270_527 　

ISSN： 1882-0743

eISSN： 1348-6535
Electrical Conductivity and Water-Methanol Uptake of Proton Conducting NafionR117 Membrane Peer-reviewed

K. Miura, J.-O. Hong, K. Yashiro, Y. Nigara, T. Kawada, J. Mizusaki

Transactions of the Materials Research Society of Japan　26　1079-1082　2001/04
Application of SOFC to Electric Vehicles Peer-reviewed

T. Kawada

Bulletin of the Ceramic Society of Japan　36　489-492　2001/04
Phase diagram calculations of ZrO2-based ceramics with an emphasis on the reduction/oxidation equilibria of cerium ions in the ZrO2-YO1.5-CeO2-CeO1.5 system Peer-reviewed

Harumi Yokokawa, Natsuko Sakai, Teruhisa Horita, Katsuhiko Yamaji, Yueping Xiong, Takanori Otake, Hiroo Yugami, Tatsuya Kawada, Junichiro Mizusaki

Journal of Phase Equilibria　22　(3)　331-338　2001

DOI： 10.1361/105497101770338842 　

ISSN： 1054-9714
Thermodynamic considerations on ceria-based fluorite-type oxides with emphases on miscibility gap, electron concentration and proton solubility Peer-reviewed

H Yokokawa, N Sakai, T Horita, K Yamaji, YP Xiong, T Otake, T Kawada, J Mizusaki, T Hashimoto, S Yamaguchi

SOLID OXIDE FUEL CELLS VII (SOFC VII)　2001　(16)　339-348　2001
Imaging and analysis of active sites for oxygen reduction at cathode/electrolyte interfaces Peer-reviewed

T Horita, K Yamaji, N Sakai, H Yokokawa, T Kato, T Kawada

SOLID OXIDE FUEL CELLS VII (SOFC VII)　2001　(16)　539-546　2001
Electrochemical properties of oxide anode materials for SOFC Peer-reviewed

K Yashiro, T Kobayashi, LQ Han, A Kaimai, Y Nigara, T Kawada, J Mizusaki, K Kawamura

SOLID OXIDE FUEL CELLS VII (SOFC VII)　2001　(16)　678-683　2001
Surface reaction kinetics of oxygen on La1-xSrxCoO3-delta cathode Peer-reviewed

T Kawada, M Sase, J Suzuki, K Masuda, K Yashiro, A Kaimai, Y Nigara, J Mizusaki, K Kawamura, H Yugami

SOLID OXIDE FUEL CELLS VII (SOFC VII)　2001　(16)　529-538　2001
Electrochemical oxidation of CO in a CO-CO2 system at the interface of Ni grid electrode/YSZ electrolyte Peer-reviewed

FZ Boulenouar, K Yashiro, M Oishi, A Kaimai, Y Nigara, T Kawada, J Mizusaki

SOLID OXIDE FUEL CELLS VII (SOFC VII)　2001　(16)　759-768　2001
Hydrogen permeability in Ce0.8Yb0.2O1.9 at high temperatures Peer-reviewed

Y. Nigara, K. Kawamura, T. Kawada, J. Mizusaki

Solid State Ionics　136-137　215-221　2000/11/02
Publisher: Elsevier Science Publishers B.V.
DOI： 10.1016/S0167-2738(00)00313-1 　

ISSN： 0167-2738
Ce3+ concentration in ZrO2-CeO2-Y2O3 system studied by electronic Raman scattering Peer-reviewed

Takanori Otake, Hiroo Yugami, Hitoshi Naito, Kenichi Kawamura, Tatsuya Kawada, Junichiro Mizusaki

Solid State Ionics　135　(1-4)　663-667　2000/11/01
Publisher: Elsevier Science Publishers B.V.
DOI： 10.1016/S0167-2738(00)00428-8 　

ISSN： 0167-2738
Oxygen transport properties of La1-xCaxCrO3-delta as an interconnect material of a solid oxide fuel cell Peer-reviewed

N Sakai, K Yamaji, T Horita, H Yokokawa, T Kawada, M Dokiya

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　147　(9)　3178-3182　2000/09

DOI： 10.1149/1.1393880 　

ISSN： 0013-4651
A novel technique for imaging electrochemical reaction sites on a solid oxide electrolyte Peer-reviewed

T Kawada, T Horita, N Sakai, H Yokokawa, M Dokiya, J Mizusaki

SOLID STATE IONICS　131　(1-2)　199-210　2000/06

DOI： 10.1016/S0167-2738(00)00634-2 　

ISSN： 0167-2738
Nonstoichiometry of Zr0.164Ce0.654Y0.182O1.91-delta Peer-reviewed

Takenori Otake, Hiroo Yugami, Kenichi Kawamura, Yutaka Nigara, Tatsuya Kawada, Junichiro Mizusaki

Electrochemistry　68　(6)　451-454　2000/04
Influence of the coexisting gases on the electrochemical reaction rates between 873 and 1173 K in a CH4-H2O/Pt/YSZ system Peer-reviewed

Shigenori Onuma, Atsushi Kaimai, Kenichi Kawamura, Yutaka Nigara, Tatsuya Kawada, Junichiro Mizusaki, Hiroaki Tagawa

Solid State Ionics　132　(3-4)　309-331　2000/04

DOI： 10.1016/S0167-2738(00)00647-0 　
Concept and technology of SOFC for electric vehicles Peer-reviewed

Jan Van herle, R. Ihringer, Nigel M. Sammes, Goeff Tompsett, Kevin Kendall, Koichi Yamada, Ching-Ju Wen, Tatsuya Kawada, Manabu Ihara, Junichiro Mizusaki

Solid State Ionics　132　(1-4)　333-342　2000/04

DOI： 10.1016/S0167-2738(00)00649-4 　
Improved tubular SOFC for quick thermal cycling Peer-reviewed

Jan Van herle, Raphael Ihringer, Joseph Sfeir, Nigel M. Sammes, Geoff Tompsett, Kevin Kendall, Koichi Yamada, C. Wen, Manabu Ihara, Tatsuya Kawada, Junichiro Mizusaki

4th European Solid Oxide Fuel Cell Forum　2　251-260　2000/04
Techiniques in Electrochemical Measurement, Potential Measurement (Reference Electrode:SOlid Electrolyte) Peer-reviewed

Tatsuya Kawada

Electrochemistry　68　666-670　2000/04
Oxygen reduction sites and diffusion paths at La0.9Sr0.1MnO3-x/yttria-stabilized zirconia interface for different cathodic overvoltages by secondary-ion mass spectrometry Peer-reviewed

Teruhisa Horita, Katsuhiko Yamaji, Natsuko Sakai, Harumi Yokokawa, Tatsuya Kawada, Tohru Kato

Solid State Ionics　127　(1-2)　55-65　2000/01/01
Publisher: Elsevier Science Publishers B.V.
DOI： 10.1016/S0167-2738(99)00276-3 　

ISSN： 0167-2738
Non-equilibrium gas sensing mechanism in perovskite-type oxide La0.5Sr0.5CoO3-delta Peer-reviewed

K Yashiro, S Onuma, A Kaimai, K Kawamura, Y Nigara, T Kawada, J Mizusaki

HIGH TEMPERATURE CORROSION AND MATERIALS CHEMISTRY　99　(38)　525-533　2000
Hydrogen permeability in sintered CeO2 at high temperatures Peer-reviewed

Y. Nigara, K. Kawamura, T. Kawada, J. Mizusaki, M. Ishigame

Journal of the Electrochemical Society　146　(8)　2948-2953　1999/08
Publisher: Electrochemical Soc Inc
DOI： 10.1149/1.1392033 　

ISSN： 0013-4651
Determination of the oxygen permeation flux through La0.75Ca0.25CrO3-delta by an electrochemical method Peer-reviewed

N Sakai, K Yamaji, T Horita, H Yokokawa, T Kawada, M Dokiya, K Hiwatashi, A Ueno, M Aizawa

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　146　(4)　1341-1345　1999/04

DOI： 10.1149/1.1391767 　

ISSN： 0013-4651
An oxygen sensor using a process of high-temperature oxidation of metal Peer-reviewed

K Kawamura, A Kaimai, Y Nigara, T Kawada, J Mizusaki

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　146　(4)　1608-1611　1999/04

DOI： 10.1149/1.1391813 　

ISSN： 0013-4651
Investigation of Diffusion Mechanism in Lanthanum Chromites

SAKAI Natsuko, YAMAJI Katsuhiko, HORITA Teruhisa, ISHIKAWA Masahiko, YOKOKAWA Harumi, KAWADA Tatsuya, DOKIYA Masayuki

J. Mass Spectrom. Soc. Jpn.　47　(1)　32-37　1999/02/01
Publisher: The Mass Spectrometry Society of Japan
DOI： 10.5702/massspec.47.32 　

ISSN： 1340-8097

More details Close

Diffusion coefficients of oxide ion and cations in alkaline-earths doped lanthanum chromites were determined by secondary ion mass spectrometry (SIMS). The contribution of grain boundary as a fast diffusion path was quantitatively evaluated by analyzing the depth profiles. The grain boundary diffusion coefficients were 10⁴ times higher than the bulk diffusion coefficients for oxide ion, and 10⁵ times higher for cations. For A-site cation diffusion, the diffusion mechanism at grain boundary has been found to be closely related with the valence state of chromium ion, which will play a main role of determining the vacancy concentration at A-site in the vicinity of grain boundaries. The oxygen partial pressure dependence of oxide ion diffusion coefficient was determined by annealing in Ar-¹⁸O₂ and Ar-H₂-C¹⁸O₂, and the results revealed a good agreement with the data of oxygen permeation fluxes which were measured in steady state under a large gradient of oxygen partial pressure.
Reaction kinetics of CH4-H2O gas-mixtures on Pt/YSZ system Peer-reviewed

S Onuma, J Mizusaki, A Kaimai, K Kawamura, Y Nigara, T Kawada, H Tagawa

SOLID OXIDE FUEL CELLS (SOFC VI)　99　(19)　991-1000　1999
A new approach to analyze LaMnO(3)N(2)O(3)-stabilized ZrO(2) interface by secondary ion mass spectrometry Peer-reviewed

T Horita, K Yamaji, H Negishi, N Sakai, H Yokokawa, T Kawada, T Kato

SOLID OXIDE FUEL CELLS (SOFC VI)　99　(19)　954-958　1999
Gas electrode reaction for CO sensing at a porous Au/YSZ interface Peer-reviewed

J Mizusaki, T Kawada, A Kaimai, Y Nigara, K Kawamura, H Matsumoto

CHEMICAL SENSORS IV, PROCEEDINGS OF THE SYMPOSIUM　99　(23)　275-281　1999
In-situ oxygen potential measurement on (La,Sr)CoO3.delta electrodes Peer-reviewed

T Kawada, S Haga, K Kawamura, Y Nigara, A Kaimai, J Mizusaki, H Yugami

SOLID OXIDE FUEL CELLS (SOFC VI)　99　(19)　396-403　1999
High temperature transport properties at metal/SrTiO3 interfaces Peer-reviewed

T Kawada, N Iizawa, M Tomida, A Kaimai, K Kawamura, Y Nigara, J Mizusaki

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY　19　(6-7)　687-691　1999

DOI： 10.1016/S0955-2219(98)00297-0 　

ISSN： 0955-2219
Oxygen isotope exchange with a dense La0.6Sr0.4CoO3-δ electrode on a Ce0.9Ca0.1O1.9 electrolyte Peer-reviewed

T. Kawada, K. Masuda, J. Suzuki, A. Kaimai, K. Kawamura, Y. Nigara, J. Mizusaki, H. Yugami, H. Arashi, N. Sakai, H. Yokokawa

Solid State Ionics　121　(1)　271-279　1999
Publisher: Elsevier Science Publishers B.V.
DOI： 10.1016/S0167-2738(99)00046-6 　

ISSN： 0167-2738
Oxygen surface exchange of Y0.2Ce0.8O2-x under reducing atmosphere Peer-reviewed

T Horita, K Yamaji, N Sakai, M Ishikawa, H Yokokawa, T Kawada, M Dokiya

ELECTROCHEMICAL AND SOLID STATE LETTERS　1　(1)　4-6　1998/07

ISSN： 1099-0062
Grain-boundary diffusion of strontium in (La,Ca)CrO(3) perovskite-type oxide by SIMS Peer-reviewed

T Horita, N Sakai, T Kawada, H Yokokawa, M Dokiya

JOURNAL OF THE AMERICAN CERAMIC SOCIETY　81　(2)　315-320　1998/02

ISSN： 0002-7820
Oxalate coprecipitation of doped ceria powder for tape casting Peer-reviewed

J Van Herle, T Horita, T Kawada, N Sakai, H Yokokawa, M Dokiya

CERAMICS INTERNATIONAL　24　(3)　229-241　1998

DOI： 10.1016/S0272-8842(97)00007-2 　

ISSN： 0272-8842
Ceria-zirconia composite electrolyte for solid oxide fuel cells Peer-reviewed

T Horita, N Sakai, H Yokokawa, M Dokiya, T Kawada, J Van Herle, K Sasaki

JOURNAL OF ELECTROCERAMICS　1　(2)　155-164　1997/09

ISSN： 1385-3449
Application of SIMS to Oxygen Diffusion Measurement in Ceramics

KAWADA Tatsuya

J. Mass Spectrom. Soc. Jpn.　45　(2)　201-217　1997/04/01
Publisher: The Mass Spectrometry Society of Japan
DOI： 10.5702/massspec.45.201 　

ISSN： 1340-8097

More details Close

One of the most interesting features of secondary ion mass spectrometry (SIMS) is its ability to detect isotope ratio in a small area of a solid state sample. It enables to study isotope diffusion properties in solids. Experimental setup and data analysis for isotope exchange/SIMS measurement are introduced focusing on its application to oxygen transport study in ceramic materials. Fast diffusion paths and preferred surface reaction sites are visualized by sector type SIMS. Oxygen vacancy diffusion coefficient and chemical diffusion coefficient of nonstoichiometric oxides are also estimated from the isotope diffusion coefficient and thermodynamic data.
Fabrication and sintering of fine yttria-doped ceria powder Peer-reviewed

J VanHerle, T Horita, T Kawada, N Sakai, H Yokokawa, M Dokiya

JOURNAL OF THE AMERICAN CERAMIC SOCIETY　80　(4)　933-940　1997/04

DOI： 10.1111/j.1151-2916.1997.tb02924.x 　

ISSN： 0002-7820
Electrochemial reaction kinetics of mixed conducting electrodes on CeO2-based solid electrolytes Peer-reviewed

K Masuda, A Kaimai, K Kawamura, Y Nigara, T Kawada, J Mizusaki, H Yugami, H Arashi

PROCEEDINGS OF THE FIFTH INTERNATIONAL SYMPOSIUM ON SOLID OXIDE FUEL CELLS (SOFC-V)　97　(40)　473-482　1997
Characterization of ceria coated YSZ by a platinum point electrode in H-2-H2O atmosphere Peer-reviewed

T Horita, N Sakai, H Yokokawa, M Dokiya, T Kawada

SOLID STATE IONICS　86-8　1259-1266　1996/07

DOI： 10.1016/0167-2738(96)00298-6 　

ISSN： 0167-2738
Thermodynamic representation of nonstoichiometric lanthanum manganite Peer-reviewed

H Yokokawa, T Horita, N Sakai, M Dokiya, T Kawada

SOLID STATE IONICS　86-8　1161-1165　1996/07

DOI： 10.1016/0167-2738(96)00281-0 　

ISSN： 0167-2738
Oxygen permeation measurement of La1-xCaxCrO3-delta by using an electrochemical method Peer-reviewed

N Sakai, T Horita, H Yokokawa, M Dokiya, T Kawada

SOLID STATE IONICS　86-8　1273-1278　1996/07

DOI： 10.1016/0167-2738(96)00300-1 　

ISSN： 0167-2738
Stability of lanthanum calcium chromite-lanthanum strontium manganite interfaces in solid oxide fuel cells Peer-reviewed

H Nishiyama, M Aizawa, H Yokokawa, T Horita, N Sakai, M Dokiya, T Kawada

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　143　(7)　2332-2341　1996/07

DOI： 10.1149/1.1837002 　

ISSN： 0013-4651
Low temperature fabrication of (Y,Gd,Sm)-doped ceria electrolyte Peer-reviewed

J VanHerle, T Horita, T Kawada, N Sakai, H Yokokawa, M Dokiya

SOLID STATE IONICS　86-8　1255-1258　1996/07

DOI： 10.1016/0167-2738(96)00297-4 　

ISSN： 0167-2738
Oxygen tracer diffusion coefficient of (La,Sr)MnO3+/-delta Peer-reviewed

Yasuda, I, K Ogasawara, M Hishinuma, T Kawada, M Dokiya

SOLID STATE IONICS　86-8　1197-1201　1996/07

DOI： 10.1016/0167-2738(96)00287-1 　

ISSN： 0167-2738
Fabrication of planar solid oxide fuel cell by composite plate process Peer-reviewed

RH Song, T Horita, N Sakai, T Kawada, H Yokokawa, M Dokiya

DENKI KAGAKU　64　(6)　614-619　1996/06

ISSN： 0366-9297
Simultaneous Thermogravimetry - Mass Spectrometry for a Solid Oxide Fuel Cell Cathode: (La(0.7)Sr(0.3))(0.9)MnO(3) Peer-reviewed

H. Yokokawa, N. Sakai, T. Horita, M. Dokiya, T. Kawada, Y. Takai, M. Todoki

IONICS　2　(3-4)　190-195　1996/05

DOI： 10.1007/BF02376020 　

ISSN： 0947-7047
Oxidation and steam deforming of CH4 on Ni and Fe anodes under low humidity conditions in solid oxide fuel cells Peer-reviewed

T Horita, N Sakai, T Kawada, H Yokokawa, M Dokiya

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　143　(4)　1161-1168　1996/04

DOI： 10.1149/1.1836613 　

ISSN： 0013-4651
Electrochemical reaction on ceria coated zirconia in H-2-H2O atmosphere Peer-reviewed

T Horita, N Sakai, H Yokokawa, M Dokiya, T Kawada

HIGH TEMPERATURE ELECTROCHEMISTRY: CERAMICS AND METALS　281-286　1996

ISSN： 0907-0079
Sintering behaviour and ionic conductivity of yttria-doped ceria Peer-reviewed

J Vanherle, T Horita, T Kawada, N Sakai, H Yokokawa, M Dokiya

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY　16　(9)　961-973　1996

DOI： 10.1016/0955-2219(96)00012-X 　

ISSN： 0955-2219
Simultaneous thermogravimetry mass spectrometry for a solid oxide fuel cell interconnect, (La0.7Ca0.32)CrO31 Peer-reviewed

H Yokokawa, T Horita, N Sakai, T Kawada, M Dokiya, Y Takai, M Todoki

THERMOCHIMICA ACTA　267　129-138　1995/12

DOI： 10.1016/0040-6031(95)02472-7 　

ISSN： 0040-6031
AN INVESTIGATION OF ANODES FOR DIRECT-OXIDATION OF CARBON IN SOLID OXIDE FUEL-CELLS Peer-reviewed

T HORITA, N SAKAI, T KAWADA, H YOKOKAWA, M DOKIYA

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　142　(8)　2621-2624　1995/08

DOI： 10.1149/1.2050064 　

ISSN： 0013-4651
REACTION BETWEEN CALCIUM-DOPED LANTHANUM CHROMITE AND SILICA Peer-reviewed

T HORITA, JM CHOI, YK LEE, N SAKAI, T KAWADA, H YOKOKAWA, M DOKIYA

JOURNAL OF THE AMERICAN CERAMIC SOCIETY　78　(7)　1729-1736　1995/07

DOI： 10.1111/j.1151-2916.1995.tb08882.x 　

ISSN： 0002-7820
EXPERIMENTAL-DETERMINATION OF OXYGEN PERMEATION FLUX THROUGH BULK AND GRAIN-BOUNDARY OF LA0.7CA0.3CRO3 Peer-reviewed

T KAWADA, T HORITA, N SAKAI, H YOKOKAWA, M DOKIYA

SOLID STATE IONICS　79　201-207　1995/07

DOI： 10.1016/0167-2738(95)00062-B 　

ISSN： 0167-2738
CONDUCTIVITY AND STRENGTH BEHAVIOR OF ALUMINA(WHISKER)-ZIRCONIA COMPOSITES Peer-reviewed

CS MONTROSS, BA VANHASSEL, T KAWADA, H YOKOKAWA, M DOKIYA

JOURNAL OF MATERIALS SCIENCE　30　(12)　3285-3290　1995/06

DOI： 10.1007/BF01209251 　

ISSN： 0022-2461
CHEMICAL THERMODYNAMIC STABILITIES OF ELECTRODE-ELECTROLYTE INTERFACES OF HIGH-TEMPERATURE ELECTROCHEMICAL-CELLS Peer-reviewed

H YOKOKAWA, T HORITA, N SAKAI, T KAWADA, M DOKIYA

SOLID STATE IONICS　78　(3-4)　203-210　1995/06

DOI： 10.1016/0167-2738(95)00092-K 　

ISSN： 0167-2738
POROUS YSZ AS A SURFACE OXYGEN POTENTIAL PROBE ON POLARIZED ELECTRODES Peer-reviewed

T KAWADA, BA VANHASSEL, T HORITA, N SAKAI, H YOKOKAWA, M DOKIYA

SOLID STATE IONICS　70　65-71　1994/05

DOI： 10.1016/0167-2738(94)90288-7 　

ISSN： 0167-2738
REACTION OF SOFC COMPONENTS WITH SEALING MATERIALS Peer-reviewed

T HORITA, N SAKAI, T KAWADA, H YOKOKAWA, M DOKIYA

DENKI KAGAKU　61　(7)　760-762　1993/07

ISSN： 0366-9297
Comment Using Chemical Equilibria Calculation on Discussion about "Synthesis of Titanium Nitride Whiskers from Potassium Fluorotitanate (IV)"

YOKOKAWA Harumi, SAKAI Natsuko, KAWADA Tatsuya, DOKIYA Masayuki

Journal of the Ceramic Society of Japan　100　(1163)　979-981　1992/07/01
Publisher: The Ceramic Society of Japan
DOI： 10.2109/jcersj.100.979 　

ISSN： 1882-1022
COMMENT USING CHEMICAL-EQUILIBRIA CALCULATION ON DISCUSSION ABOUT SYNTHESIS OF TITANIUM NITRIDE WHISKERS FROM POTASSIUM FLUOROTITANATE (IV) Peer-reviewed

H YOKOKAWA, N SAKAI, T KAWADA, M DOKIYA

NIPPON SERAMIKKUSU KYOKAI GAKUJUTSU RONBUNSHI-JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　100　(7)　979-981　1992/07

ISSN： 0914-5400
THERMODYNAMIC STABILITIES OF PEROVSKITE OXIDES FOR ELECTRODES AND OTHER ELECTROCHEMICAL MATERIALS Peer-reviewed

H YOKOKAWA, N SAKAI, T KAWADA, M DOKIYA

SOLID STATE IONICS　52　(1-3)　43-56　1992/05

DOI： 10.1016/0167-2738(92)90090-C 　

ISSN： 0167-2738
LOW-TEMPERATURE AIR SINTERABLE LANTHANUM CALCIUM CHROMITE WITH CHROMIUM DEFICIT FOR SOFC SEPARATOR Peer-reviewed

M MORI, N SAKAI, T KAWADA, H YOKOKAWA, M DOKIYA

DENKI KAGAKU　59　(4)　314-319　1991/04

ISSN： 0366-9297
THERMAL-EXPANSION OF SOME CHROMIUM DEFICIENT LANTHANUM CHROMITES Peer-reviewed

N SAKAI, T KAWADA, H YOKOKAWA, M DOKIYA, T IWATA

SOLID STATE IONICS　40-1　394-397　1990/08

DOI： 10.1016/0167-2738(90)90365-X 　

ISSN： 0167-2738
THERMODYNAMIC ANALYSIS ON INTERFACE BETWEEN PEROVSKITE ELECTRODE AND YSZ ELECTROLYTE Peer-reviewed

H YOKOKAWA, N SAKAI, T KAWADA, M DOKIYA

SOLID STATE IONICS　40-1　398-401　1990/08

DOI： 10.1016/0167-2738(90)90366-Y 　

ISSN： 0167-2738
STRUCTURE AND POLARIZATION CHARACTERISTICS OF SOLID OXIDE FUEL-CELL ANODES Peer-reviewed

T KAWADA, N SAKAI, H YOKOKAWA, M DOKIYA, M MORI, T IWATA

SOLID STATE IONICS　40-1　402-406　1990/08

DOI： 10.1016/0167-2738(90)90367-Z 　

ISSN： 0167-2738
THERMODYNAMIC STABILITY OF SRCEO3 IN AQUEOUS-SOLUTIONS AT 298-K AND IN A HIGH-TEMPERATURE REDUCTIVE ATMOSPHERE Peer-reviewed

H YOKOKAWA, N SAKAI, T KAWADA, M DOKIYA

DENKI KAGAKU　58　(6)　561-563　1990/06

ISSN： 0366-9297
A NEW CATHODE MATERIAL (LA,SR)1-Z(MN1-YCRY)O3(0-LESS-THAN-OR-EQUAL-TO-Y-LESS-THAN-OR-EQUAL-TO-0.2) FOR SOFC Peer-reviewed

M MORI, N SAKAI, T KAWADA, H YOKOKAWA, M DOKIYA

DENKI KAGAKU　58　(6)　528-532　1990/06

ISSN： 0366-9297
CHEMICAL-POTENTIAL DIAGRAMS FOR LA-M-ZR-O (M=V, CR, MN, FE, CO, NI) SYSTEMS - REACTIVITY OF PEROVSKITES WITH ZIRCONIA AS A FUNCTION OF OXYGEN POTENTIAL Peer-reviewed

H YOKOKAWA, N SAKAI, T KAWADA, M DOKIYA

DENKI KAGAKU　58　(6)　489-497　1990/06

ISSN： 0366-9297
CONSTRUCTION OF ELECTROCHEMICAL POTENTIAL DIAGRAMS FOR MULTICOMPONENT SYSTEMS - APPLICATIONS TO STABILITY OF LACOO3-BASED DOUBLE OXIDES IN AQUEOUS-SOLUTIONS Peer-reviewed

H YOKOKAWA, N SAKAI, T KAWADA, M DOKIYA

DENKI KAGAKU　58　(4)　341-348　1990/04

ISSN： 0366-9297
CHEMICAL THERMODYNAMIC CONSIDERATIONS ON CHEMICAL-STABILITY OF (LA1-XSRX)YMNO3 PEROVSKITE AIR ELECTRODE AGAINST REACTION WITH ZRO2 ELECTROLYTE IN SOFC Peer-reviewed

H YOKOKAWA, N SAKAKI, T KAWADA, M DOKIYA

DENKI KAGAKU　58　(2)　162-171　1990/02

ISSN： 0366-9297
CONSTRUCTION OF CHEMICAL-POTENTIAL DIAGRAMS FOR THE MULTICOMPONENT SYSTEM - LI-FE-C-O - APPLICATION TO REACTIONS BETWEEN MOLTEN CARBONATES AND METALS Peer-reviewed

H YOKOKAWA, N SAKAI, T KAWADA, M DOKIYA, S KATO, K OTA

DENKI KAGAKU　58　(1)　57-62　1990/01

ISSN： 0366-9297
SINGLE CELL PERFORMANCE OF PLANAR SOLID OXIDE FUEL-CELLS Peer-reviewed

T IWATA, N SAKAI, T KAWADA, H YOKOKAWA, M DOKIYA

PROCEEDINGS OF THE 25TH INTERSOCIETY ENERGY CONVERSION ENGINEERING CONFERENCE, VOLS 1-6　235-239　1990
THERMODYNAMIC ANALYSIS ON RELATION BETWEEN NONSTOICHIOMETRY OF LAMNO3 PEROVSKITES AND THEIR REACTIVITY WITH ZRO2 Peer-reviewed

H YOKOKAWA, N SAKAI, T KAWADA, M DOKIYA

DENKI KAGAKU　57　(8)　829-836　1989/08

ISSN： 0366-9297
CHEMICAL THERMODYNAMIC CONSIDERATIONS ON REACTIVITY OF PEROVSKITE OXIDE ELECTRODES WITH ZIRCONIA Peer-reviewed

H YOKOKAWA, N SAKAI, T KAWADA, M DOKIYA

DENKI KAGAKU　57　(8)　821-828　1989/08

ISSN： 0366-9297
GENERALIZED CHEMICAL-POTENTIAL DIAGRAMS FOR METAL-OXYGEN-SULFUR SYSTEMS Peer-reviewed

H YOKOKAWA, T KAWADA, M DOKIYA

DENKI KAGAKU　56　(9)　751-756　1988/09

ISSN： 0366-9297

Show all ︎Show first 5

Misc. 173

Review of factors affecting the performance degradation of Ni-YSZ fuel electrodes in solid oxide electrolyzer cells

Xiaolin Shao, Riyan Achmad Budiman, Takashi Sato, Mina Yamaguchi, Tatsuya Kawada, Keiji Yashiro

Journal of Power Sources　609　2024/07/30

DOI： 10.1016/j.jpowsour.2024.234651 　

ISSN： 0378-7753
Modeling current–voltage relationships of mixed conducting cathode materials for solid oxide fuel cells

Tatsuya Kawada

Current Opinion in Electrochemistry　21　274-282　2020/06

DOI： 10.1016/j.coelec.2020.03.016 　

ISSN： 2451-9103

eISSN： 2451-9111
Evaluation of Reaction Mechanism on SOFC Cathodes by Using Patterned Thin Film Model Electrodes

雨澤浩史, 今泉貴明, 水野敬太, 木村勇太, 中村崇司, 新田清文, 関澤央輝, 井口史匡, 湯上浩雄, 八代圭司, 川田達也

固体イオニクス討論会講演要旨集　46th (CD-ROM)　2020
パターンモデル電極によるPCFC空気極La_0.6Sr_0.4CoO_3-δにおける電極反応機構の解析

西舘克弥, 四宮由貴, 水野敬太, 木村勇太, 中村崇司, 八代圭司, 川田達也, 見神祐一, 尾沼重徳, 黒羽智宏, 谷口昇, 辻庸一郎, 雨澤浩史

電気化学会大会講演要旨集(CD-ROM)　86th　2019
緻密膜パターン電極によるLa_0.6Sr_0.4CoO_3-δ/Gd_0.1Ce_0.9O_3-δコンポジット空気極の反応機構の解明

今泉貴明, 水野敬太, 中村崇司, 木村勇太, 新田清文, 関澤央輝, 井口史匡, 湯上浩雄, 八代圭司, 川田達也, 雨澤浩史

電気化学会大会講演要旨集(CD-ROM)　86th　2019
La_0.6Sr_0.4CoO_3-δ/Gd_0.1Ce_0.9O_1.95積層パターン緻密膜電極を用いたSOFCコンポジット空気極の反応機構の解明

今泉貴明, 水野敬太, 木村勇太, 中村崇司, 新田清文, 関澤央輝, 井口史匡, 湯上浩雄, 八代圭司, 川田達也, 雨澤浩史

固体イオニクス討論会講演要旨集　45th　2019
Variation of mechanical properties of YSZ upon cubic to tetragonal phase transformation promoted by impurity Ni Peer-reviewed

H. Umemura, C. Sekizawa, S. Watanabe, K. Yashiro, T. Kawada

ECS Transactions　91　(1)　837-845　2019

DOI： 10.1149/09101.0837ecst 　

ISSN： 1938-6737

eISSN： 1938-5862
Evaluation method of current distribution in SOFC in operation Peer-reviewed

T. Tsuchikura, T. Sakamoto, T. Zukawa, H. Sumi, K. Sato, K. Yashiro, T. Hashida, T. Kawada

ECS Transactions　91　(1)　579-588　2019

DOI： 10.1149/09101.0579ecst 　

ISSN： 1938-6737

eISSN： 1938-5862
Material development strategy of lightweight solid oxide fuel cells for airplane system electrification Peer-reviewed

S. Hashimoto, T. Hirota, K. Suzuki, T. Namioka, H. Ito, R. Miyata, K. Kobayashi, K. Yashiro, H. Takamura, T. Kawada, K. Yoshimi, N. Kijima, T. Manabe, T. Tsuchiya, T. Kojima, K. Okai

ECS Transactions　91　(1)　311-318　2019

DOI： 10.1149/09101.0311ecst 　

ISSN： 1938-6737

eISSN： 1938-5862
Study of CaTiO<inf>3</inf> based ionic conductors for lightweight SOFCs Peer-reviewed

K. Suzuki, Y. Kouchi, T. Hirota, H. Kato, T. Namioka, H. Ito, Hyun Jin Hong, K. Yashiro, T. Kawada, K. Okai, S. Hashimoto

ECS Transactions　91　(1)　1217-1222　2019

DOI： 10.1149/09101.1217ecst 　

ISSN： 1938-6737

eISSN： 1938-5862
Contraction of porous nickel during low temperature oxidation Peer-reviewed

Y. Morishita, F. Zhao, S. Watanabe, K. Yashiro, T. Kawada

ECS Transactions　91　(1)　1979-1984　2019

DOI： 10.1149/09101.1979ecst 　

ISSN： 1938-6737

eISSN： 1938-5862
Correlation between electrode reaction and chromium deposition in SOFC cathodes Peer-reviewed

S. Kageyama, Y. Shindo, Y. Fujimaki, K. Mizuno, Y. Kimura, T. Nakamura, F. Iguchi, K. Yashiro, H. Yugami, T. Kawada, K. Amezawa

ECS Transactions　91　(1)　1231-1237　2019

DOI： 10.1149/09101.1231ecst 　

ISSN： 1938-6737

eISSN： 1938-5862
Evaluation of titanium based alloys as interconnects for the light weight SOFC system Peer-reviewed

K. Kobayashi, R. Miyata, K. Yashiro, H. Takamura, K. Yoshimi, T. Kawada, S. Hashimoto, K. Okai

ECS Transactions　91　(1)　2279-2290　2019

DOI： 10.1149/09101.2279ecst 　

ISSN： 1938-6737

eISSN： 1938-5862
Oxygen Reduction Reaction in High Temperature Fuel Cells Invited

YASHIRO Keiji, KAWADA Tatsuya

60　(6)　345-351　2018/12
パターン緻密膜電極を用いたランタンコバルタイトPCFC空気極における反応サイト評価

雨澤浩史, 四宮由貴, 水野敬太, 西舘克弥, 木村勇太, 中村崇司, 八代圭司, 川田達也, 見神祐一, 尾沼重徳, 黒羽智宏, 谷口昇, 辻庸一郎

電気化学秋季大会講演要旨集(CD-ROM)　2018　2018
パターン緻密膜電極を用いたランタンストロンチウムコバルタイトPCFC空気極の反応サイト評価

西舘克弥, 四宮由貴, 水野敬太, 木村勇太, 中村崇司, 八代圭司, 川田達也, 見神祐一, 尾沼重徳, 黒羽智宏, 谷口昇, 辻庸一郎, 雨澤浩史

固体イオニクス討論会講演要旨集　44th　2018
SOFC混合導電性空気極の電極反応に及ぼす水蒸気の影響

水野敬太, 藤巻義信, 中村崇司, 木村勇太, 関澤央輝, 新田清文, 井口史匡, 八代圭司, 湯上浩雄, 川田達也, 雨澤浩史

固体イオニクス討論会講演要旨集　44th　2018
Multiscale simulation of LSCF with evolving ferroelastic phase

22　6p　2017/05
Publisher: 日本計算工学会
Numerical plate testing for non-elastic multi-scale analysis of plate-shaped device

22　6p　2017/05
Publisher: 日本計算工学会
Development of transient electrochemo-mechanical analysis system for solid oxide fuel cell

22　5p　2017/05
Publisher: 日本計算工学会
SOFC空気極反応に及ぼす三相界面反応の寄与

藤巻義信, 水野敬太, 木村勇太, 中村崇司, 新田清文, 寺田靖子, 八代圭司, 川田達也, 井口史匡, 湯上浩雄, 雨澤浩史

電気化学会大会講演要旨集(CD-ROM)　84th　2017
パターン緻密膜モデル電極を用いた混合導電性SOFC空気極における反応経路評価

雨澤浩史, 水野敬太, 藤巻義信, 木村勇太, 中村崇司, 新田清文, 寺田靖子, 井口史匡, 八代圭司, 湯上浩雄, 川田達也

電気化学秋季大会講演要旨集(CD-ROM)　2017　2017
SOFC空気極反応における三相界面反応の影響の評価

水野敬太, 藤巻義信, 中村崇司, 木村勇太, 新田清文, 関澤央輝, 寺田靖子, 井口史匡, 八代圭司, 湯上浩雄, 川田達也, 雨澤浩史

電気化学会東北支部セミコンファレンス講演論文集　48th　2017
SOFC混合導電性空気極の電極反応に対する三相界面反応の寄与

水野敬太, 藤巻義信, 中村崇司, 木村勇太, 新田清文, 寺田靖子, 井口史匡, 八代圭司, 湯上浩雄, 川田達也, 雨澤浩史

固体イオニクス討論会講演要旨集　43rd　2017
A simulation of ferroelastic phase formation by using phase-field model

M. Muramatsu, T. Kawada, K. Terada

Key Engineering Materials　725　208-213　2017
Publisher: Trans Tech Publications Ltd
DOI： 10.4028/www.scientific.net/KEM.725.208 　

ISSN： 1013-9826

eISSN： 1662-9795
Analysis system of transient Electrochemo-Mechanical simulation of solid oxide fuel cell implemented in commercial fem software

Masami Sato, Mayu Muramatsu, Kenjiro Terada, Satoshi Watanabe, Keiji Yashiro, Tatsuya Kawada, Harumi Yokokawa

Transactions of the Japan Society for Computational Engineering and Science　2017　2017/01/01

DOI： 10.11421/jsces.2017.20170004 　

eISSN： 1347-8826
多孔体電極を模擬した緻密膜パターン電極を用いたSOFC空気極反応の解析

雨澤浩史, 藤巻義信, 進藤勇佑, 水野敬太, 木村勇太, 中村崇司, 新田清文, 寺田靖子, 井口史匡, 湯上浩雄, 八代圭司, 川田達也

固体イオニクス討論会講演要旨集　42nd　2016
SOFC混合導電性空気極の電気化学的反応における三相界面反応の影響

水野敬太, 藤巻義信, 木村勇太, 中村崇司, 新田清文, 寺田靖子, 井口史匡, 湯上浩雄, 八代圭司, 川田達也, 雨澤浩史

固体イオニクス討論会講演要旨集　42nd　2016
Bulk- and powder surface exchange coefficients of (La,Sr)Co03-d

H. Chiba, K. Yashiro, S. Hashimoto, T. Kawada

ECS Transactions　75　(42)　69-74　2016
Publisher: Electrochemical Society Inc.
DOI： 10.1149/07542.0069ecst 　

ISSN： 1938-5862 1938-6737
The origin of instability of lanthanum strontium cobalt ferrite La0.6Sr0.4Co0.2Fe0.8O3-δ under oxygen potential gradient

X. Wang, T. Miyazaki, K. Yashiro, S. Hashimoto, T. Kawada

ECS Transactions　75　(28)　1-9　2016
Publisher: Electrochemical Society Inc.
DOI： 10.1149/07528.0001ecst 　

ISSN： 1938-5862 1938-6737
Evaluation of Li Chemical Potential of Mechanically Stressed LiCoO2

Yuta Kimura, Mahunnop Fakkao, Keita Funayama, Takashi Nakamura, Naoaki Kuwata, Tatsuya Kawada, Junichi Kawamura, Koji Amezawa

2016 IEEE 16TH INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (IEEE-NANO)　830-831　2016

DOI： 10.1109/NANO.2016.7751546 　
OS1316-242 Mechanical Simulation of The Microstructure in The Ferroelastic Material LSCF

MURAMATSU Mayu, TERADA Kenjiro, KAWADA Tatsuya

2015　"OS1316-242-1"-"OS1316-242-2"　2015/11/21
Publisher: The Japan Society of Mechanical Engineers

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In this paper, a model which represents the mechanical behavior is developed for the ferroelastic material, Lanthanum Strontium Cobalt Ferrite (LSCF), which is a ceramic material often used for a cathode of Solid Oxide Fuel Cell (SOFC). Nonelestic deformation analysis is performed to express the mechanical property of LSCF. At the same time phase transformation of ferroelasticity is analyzed by the use of phase-field model based on micro elastic theory. In the proposed ferroelasticity model, the information of deformation, which is calculated by the mechanical simulation, is introduced to the elastic energy term of phase-field equation. The mechanical properties change in accordance with the phase transformation. By coupling the deformation and phase transformation, the mechanical behavior of ferroelasticity is analyzed. On the basis of the developed model, a simple simulation is conducted.
Cathodes

T. Kawada, T. Horita

High-Temperature Solid Oxide Fuel Cells for the 21st Century: Fundamentals, Design and Applications: Second Edition　161-193　2015/11/16
Publisher: Elsevier Inc.
DOI： 10.1016/B978-0-12-410453-2.00006-3 　
[title in Japanese] Invited Peer-reviewed

KAWADA Tatsuya, YASHIRO Keiji, HASHIMOTO Shin-ichi

Electrochemistry　83　(9)　739-745　2015/09

DOI： 10.5796/electrochemistry.83.739 　
オペランド計測に基づく固体酸化物形燃料電池用電極の材料設計

雨澤浩史, 藤巻義信, 中村崇司, 新田清文, 寺田靖子, 井口史匡, 湯上浩雄, 川田達也

資源・素材(Web)　2015　2015
Oxygen nonstoichiometry and electrochemical properties of LaNiO<inf>3-δ</inf>

R. A. Budiman, S. Hashimoto, T. Nakamura, K. Yashiro, K. Amezawa, T. Kawada

ECS Transactions　66　(2)　177-183　2015
Publisher: Electrochemical Society Inc.
DOI： 10.1149/06602.0177ecst 　

ISSN： 1938-6737 1938-5862
Surface modification of LaNi<inf>0.6</inf>Fe<inf>0.4</inf>O<inf>3-δ</inf> film electrode by Ce<inf>0.9</inf>Gd<inf>0.1</inf>O<inf>1.95</inf> porous layer

R. A. Budiman, T. Miyazaki, S. Hashimoto, K. Yashiro, K. Amezawa, T. Kawada

ECS Transactions　66　(2)　161-168　2015
Publisher: Electrochemical Society Inc.
DOI： 10.1149/06602.0161ecst 　

ISSN： 1938-6737 1938-5862
Determination of effective reaction area in a mixed-conducting SOFC cathode

K. Amezawa, Y. Fujimaki, T. Nakamura, K. D. Bagarinao, K. Yamaji, K. Nitta, Y. Terada, F. Iguchi, K. Yashiro, H. Yugami, T. Kawada

ECS Transactions　66　(2)　129-135　2015
Publisher: Electrochemical Society Inc.
DOI： 10.1149/06602.0129ecst 　

ISSN： 1938-6737 1938-5862
Direct observation of the current distributions across SOFC by measuring the lateral voltage differences

Abhilasha S. Devaraj, Keiji Yashiro, Shin-Ichi Hashimoto, Tatsuya Kawada

ECS Transactions　68　(1)　2075-2081　2015
Publisher: Electrochemical Society Inc.
DOI： 10.1149/06801.2075ecst 　

ISSN： 1938-6737 1938-5862
Influence of small defects produced in electrolytes during manufacturing processes on operated SOFCs

S. Onuki, F. Iguchi, M. Shimizu, T. Kawada, H. Yugami

ECS Transactions　68　(1)　2421-2428　2015
Publisher: Electrochemical Society Inc.
DOI： 10.1149/06801.2421ecst 　

ISSN： 1938-6737 1938-5862
Electro-chemical potential analysis of zirconium based on the reaction-diffusion equations of oxygen ion and electron considering phase transformation

M. Muramatsu, H. Kishimoto, K. Yamaji, K. Yashiro, T. Kawada, K. Terada, H. Yokokawa

ECS Transactions　68　(1)　2363-2372　2015
Publisher: Electrochemical Society Inc.
DOI： 10.1149/06801.2363ecst 　

ISSN： 1938-6737 1938-5862

eISSN： 1938-6737
Quantitative evaluation of electrochemically active area in an sofc cathode by oxygen isotopic exchange measurements of a model patterned electrode

Y. Fujimaki, T. Nakamura, K. Develos-Bagarinao, K. Yamaji, K. Yashiro, T. Kawada, F. Iguchi, H. Yugami, K. Amezawa

ECS Transactions　68　(1)　623-630　2015
Publisher: Electrochemical Society Inc.
DOI： 10.1149/06801.0623ecst 　

ISSN： 1938-6737 1938-5862
Fuel cells for efficient use of energy

Tatsuya Kawada

Topical Themes in Energy and Resources: A Cross-Disciplinary Education and Training Program for Environmental Leaders　59-74　2015/01/01
Publisher: Springer Japan
DOI： 10.1007/978-4-431-55309-0_4 　
A Simulation Coupling Electrochemical and Mechanical Behaviors of Porous Electrodes in Solid Oxide Fuel Cell Subject to Start-stop Operation

MURAMATSU Mayu, TAKAHASHI Ken, TAKASE Shinsuke, KAWADA Tatsuya, TERADA Kenjiro

The Computational Mechanics Conference　2014　(27)　418-419　2014/11/22
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-026X
スパッタ法により作成したBaCe_0.8Y_0.2O₃/水素膜燃料電池の発電性能

AOKI YOSHITAKA, KOBAYASHI SHOHEI, TSUJI ETSUSHI, HABAZAKI HIROKI, YASHIRO KEIJI, KAWADA TATSUYA

固体イオニクス討論会講演要旨集　40th　187-188　2014/11/16
OS1605 Ferroelastic Properties of Cathode Materials of Solid Oxide Fuel Cells

KIMURA Yuta, HASHIMOTO Shin-ichi, AMEZAWA Koji, YASHIRO Keiji, KAWADA Tatsuya

2014　"OS1605-1"-"OS1605-3"　2014/07/19
Publisher: The Japan Society of Mechanical Engineers

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Temperature and frequency dependence of Young's modulus and internal friction of La_<0.6>Sr_<0.4>Co_<0.2>Fe_<0.8>O_<3-δ> were evaluated by dynamic mechanical analysis. A relaxation peak in the internal friction which follows a significant decrease in the Young's modulus was observed. It was suggested that the peak was derived from domain reorientations. An introduction of oxygen vacancies into the sample significantly changed the temperature dependence of the Young's modulus and the internal friction. The Young's modulus became larger especially below 400 K. A small peak which depended on the oxygen vacancy concentration was observed when the oxygen vacancies were introduced. This peak was considered to be due to oxygen vacancy diffusion. Such significant changes in the temperature dependence of the Young's modulus and the internal friction may be caused by crystal structure change and pinning of domain walls by the oxygen vacancies.
OS1603 Mechanical properties evaluations under simulated operating condition for SOFC materials

WATANABE Satoshi, HASHIMOTO Shinichi, YASHIRO Keiji, KAWADA Tatsuya

2014　"OS1603-1"-"OS1603-3"　2014/07/19
Publisher: The Japan Society of Mechanical Engineers

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We have attempted to construct multiscale model which can simulate inelastic deformation and stress state under operating conditions. It would need to the information about mechanical properties of solid oxide fuel cell constituent materials under operating condition for analysis model building up process and simulation indeed. Therefore, mechanical property of Ni-YSZ and yttria stabilized zirconia, used as SOFC common materials are evaluated under simulated operating condition by developed In-situ mechanical testing machine. From experimental result, Ni-YSZ composite has showed that ductile-like deformation was induced under 800℃/H_2 condition for the Ni contents of 30 and 50 vol. % from the SP tests, and creep behavior is due to its ductility from creep tests. On the other hand, 8YSZ has showed creep rupture propagation guessed crack growth under air/850℃ condition.
La_0.6Sr_0.4CoO_3-δ緻密膜パターン電極のマイクロXAS測定による有効反応場の定量的解明

藤巻義信, 中村崇司, 八代圭司, 井口史匡, 湯上浩雄, 川田達也, 新田清文, 寺田靖子, 雨澤浩史

電気化学会大会講演要旨集　81st　2014
2514 A multi-scale analysis method for electro-chemo-mechanical behavior involving sintering of porous micro structure

TERADA Kenjiro, TAKASE Shinsuke, TAKAHASHI Ken, WATANABE Satoshi, KAWADA Tatsuya

The Computational Mechanics Conference　2013　(26)　"2514-1"-"2514-2"　2013/11/02
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-026X

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The present study addresses a multi-scale analysis method for electro-chemo-mechanical coupling behavior involving sintering of porous micro structure Physical problems to be considered are the time evolutions of (a) sintering of porous micro structure, (b) electro-chemical potentials, (c) in addition to (c) inelastic deformation processes with thermal and reductive expansions The corresponding macro-scale models are derived based on the homogenization method considering the time evolutions of sintering The numerical examples show how the sintering of microstructure effects performance degradation of anode-supported flat-tube cell
J061022 Evaluation of Stress Condition of Operated Anode Supported-Type SOFC under Operating Conditions Based on Raman Scattering Spectroscopy

IGUCHI Fumitada, ONODERA Sho, ONUKI Shoma, KAWADA Tatsuya, YUGAMI Hiroo

Mechanical Engineering Congress, Japan　2013　"J061022-1"-"J061022-5"　2013/09/08
Publisher: The Japan Society of Mechanical Engineers

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The internal stress in an anode-supported type solid oxide fuel cell (SOFC) was evaluated by in-situ measurement using micro Raman scattering spectroscopy. The new method evaluating stress focused on Raman spectra of samarium-doped ceria (SDC) which was used as an interlayer in SOFC. Because the shift of F_<2g> Raman peak position and peak width in SDC was dependent on the change of stress, temperature and Sm concentration, by measuring the dependencies respectively, the stress could be calculated. We performed this method in the purchased cells of conventional anode-supported type SOFC under thermal cycles, which simulate start-and-stop of SOFC. In this study, three thermal cycles were applied. Observed results suggested that not only thermal stress relaxation but also diffusion of samarium from an interlayer to an electrolyte, and stress relaxation by plastically deformation were occurred.
J061021 Creep Properties of Anode Materials Based on Ni-YSZ in SOFC Operating Conditions

IGUCHI Fumitada, KITAHARA Hiromichi, KASEMCHAI Chaiprasobphol, KAWADA Tatsuya, YUGAMI Hiroo

Mechanical Engineering Congress, Japan　2013　"J061021-1"-"J061021-4"　2013/09/08
Publisher: The Japan Society of Mechanical Engineers

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Creep properties of Ni-YSZ cermet, which were for the anode of solid oxide fuel cells (SOFCs), were studied to evaluate the influence of the volume ratio of Ni in the cermet to creep properties. Specimens with three Ni volume ratios were prepared, and creep test was performed by 4 points bending configuration. The obtained creep curves showed clear tendencies in transition creep and steady-state creep regions. As Ni increased, both steady-state strain rate and the strain of transition creep increased. These results suggested that Ni in the microstructure of Ni-YSZ cermet played a certain role to determine the creep properties. However, comparison with the creep properties in Ni metal, both properties were significantly low. Hence, it was also suggested the importance of YSZ framework to creep properties.
130 Evaluation of mechanical properties of Ni-YSZ cermets for SOFCs under simulated environments of redox cycling

MIYASAKA Taihei, SUKINOU Shinji, WATANABE Satoshi, YASHIRO Keiji, KAWADA Tatsuya, SATO Kazuhisa, HASHIDA Toshiyuki

2013　(48)　62-63　2013/03/15
Publisher: The Japan Society of Mechanical Engineers
GS13 Influence of Redox Cycling on Mechanical Properties of Ni-YSZ Cermets for SOFCs

MIYASAKA Taihei, SUKINOU Shinji, WATANABE Satoshi, KAWADA Tatsuya, SATO Kazuhisa, HASHIDA Toshiyuki

2012　"GS13-1"-"GS13-3"　2012/09/22
Publisher: The Japan Society of Mechanical Engineers

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Effects of redox cycling on the mechanical properties of the Ni-YSZ cermets were investigated by using an in-situ small punch (SP) testing method as a function of porosity, and influence of the redox cycling on the volume expansion of Ni-YSZ cermets was examined by using a thermo-mechanical analysis (TMA) as a function of porosity and Ni/YSZ volume ratio. Experimental results obtained from the in-situ SP tests demonstrated that ductile-like fracture took place under the reducing environment at 800℃. It was shown that mechanical degradation due to redox cycling was mitigated for the Ni-YSZ cermets with higher porosities greater than 30 vol. %. Higher porosities and lower Ni content were useful to maintain the dimensional stability of the Ni-YSZ cermets. Based on the experimental results, a quantitative correlation was proposed which predict the volume expansion from porosity volume and Ni content.
Mechanical Properties of Anode Materials Based on Ni-YSZ in SOFC Operating Conditions

KITAHARA Hiromichi, IGUCHI Fumitada, OKUDA Tomonori, SATA Noriko, KAWADA Tatsuya, YUGAMI Hiroo

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A　78　(792)　1198-1207　2012/09/13
Publisher: 一般社団法人日本機械学会
DOI： 10.1299/kikaia.78.1198 　

ISSN： 1884-8338
J056044 Evaluation of Expansion Behavior of Ni-YSZ Cermets during Redox Cycling

MIYASAKA Taihei, SUKINOU Shinji, YASHIRO Keiji, KAWADA Tatsuya, MIZUSAKI Junichiro, SATO Kazuhisa, HASHIDA Toshiyuki

Mechanical Engineering Congress, Japan　2012　"J056044-1"-"J056044-3"　2012/09/09
Publisher: The Japan Society of Mechanical Engineers

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Effects of of the redox cycling on the volume expansion of Ni-YSZ cermets was investigated as a function of porosity and Ni/YSZ volume ratio by using a thermo-mechanical analysis (TMA). The first re-oxidation tests results obtained from TMA demonstrated that the amount of expansion was decreased and suppressed by lowering the Ni content of the anode and increasing the porosity. However specemen which had the large amount of Ni (50 vol.%) and the high porosity (34%) showed the high dimensional stability after several redox cycls. The large shrinkage upon reduction coused by the large amount of Ni and the low expantion upon oxidation caused by the high porosity enhanced redox reversibility.
Creep Property of Cathode Materials Based on Lanthanum Manganite in SOFC Operating Conditions

IGUCHI Fumitada, KAWADA Tatsuya, YUGAMI Hiroo

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A　78　(788)　523-530　2012/06/04
Publisher: 一般社団法人日本機械学会
DOI： 10.1299/kikaia.78.523 　

ISSN： 1884-8338
178 Effect of temperature on the mechanical properties of Ni/NiO-YSZ cermets for SOFC anodes

WATANABE Satoshi, MIYASAKA Taihei, SUKINOU Shinji, SATO Kazuhisa, AMEZAWA Koji, HASHIDA Toshiyuki, KAWADA Tatsuya

2012　(47)　162-163　2012/03/13
Publisher: The Japan Society of Mechanical Engineers
214 Dimensional Behavior of Ni-YSZ Cermets during Redox Cycling

SUKINO Shinji, MIYASAKA Taihei, SATO Kazuhisa, YASHIRO Keiji, KAWADA Tatsuya, MIZUSAKI Junichiro, HASHIDA Toshiyuki

2012　(47)　234-235　2012/03/13
Publisher: The Japan Society of Mechanical Engineers
In-situマイクロXAS測定によるSOFC多孔質カソードにおける酸素ポテンシャル分布の直接評価

藤巻義信, 渡邉秀貴, 木村勇太, 雨澤浩史, 寺田靖子, 橋本真一, 川田達也

電気化学会大会講演要旨集　79th　2012
Thermal diffusivities of La0.6Sr0.4Co1-yFeyO3-d at high temperatures under controlled atmospheres

YuCheol Shin, A. Unemoto, S. Hashimoto, K. Amezawa, T. Kawada

The proceedings of 8th European SOFC forum　B1013　2012
Estimation of macroscopic material properties using sintering simulation of porous microstructure affected by mechanical effects

Takashi Sasagawa, Ken Takahashi, Kenjiro Terada, Tatsuya Kawada

Transactions of the Japan Society for Computational Engineering and Science　2012　4　2012/01/01
Mechanical properties of Ni-YSZ cermet anode under SOFC operating condition by using in-situ mechanical testing method

Satoshi Watanabe, Kazuhisa Sato, Shinji Sukinou, Fumitada Iguchi, Keiji Yashiro, Koji Amezawa, Hiroo Yugami, Toshiyuki Hashida, Junichiro Mizusaki, Tatsuya Kawada

Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A　78　(787)　349-360　2012

DOI： 10.1299/kikaia.78.349 　

ISSN： 0387-5008
Creep property of cathode materials based on lanthanum manganite in SOFC operating conditions

Fumitada Iguchi, Tomonori Okuda, Hiromichi Kitahara, Noriko Sata, Tatsuya Kawada, Hiroo Yugami

Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A　78　(788)　523-530　2012

DOI： 10.1299/kikaia.78.523 　

ISSN： 0387-5008
Mechanical properties of anode materials based on Ni-YSZ in SOFC operating conditions

Hiromichi Kitahara, Fumitada Iguchi, Tomonori Okuda, Noriko Sata, Tatsuya Kawada, Hiroo Yugami

Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A　78　(792)　1198-1207　2012

DOI： 10.1299/kikaia.78.1198 　

ISSN： 0387-5008
J081022 Evaluation of stress conditions in operated SOFC based on in-situ Raman scattering spectroscopy

ONODERA Syo, NAGAI Masafumi, IGUCHI Fumidata, SATA Noriko, KAWADA Tatsuya, YUGAMI Hiroo

Mechanical Engineering Congress, Japan　2011　"J081022-1"-"J081022-5"　2011/09/11
Publisher: The Japan Society of Mechanical Engineers

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We invented the new evaluation method of stress conditions in operated SOFC. It's based on the observation of lattice conditions by in-situ Raman scattering spectroscopy. The Raman scattering spectra were measured using a Raman system with Ar ion laser (λ=488nm). In order to measure the Raman spectra in operating conditions, we used a glass chamber with an optically transparent window in which temperature and atmosphere can be controlled. We researched how temperature and pressure affects the Raman spectra of 20% Sm-doped ceria (20SDC) which is often used as an interlayer of the SOFC cell. We invented the evaluation method of stress conditions based on the results of these measurements and applied this method to the typical anode supported type cells with 20SDC interlayer. As a result, stress conditions in the electrolyte before operation were evaluated to be compressive. It was kept compressive during temperature rising. The compressive stress is eased with the flow of the fuel and it became stress-free or tensile stress. The tensile stress was enhanced by the re-oxidation, and the destruction of the cell was caused by cooling. Thus, stress conditions of the SOFC cell under the operation was able to be evaluated quantitatively.
Solid Oxide Fuel Cells Xll 報告

川田達也, 鹿園直毅, 白鳥祐介, 堀内賢治, 堀田照久, 松井敏明, 門馬昭彦, 八代圭司, 山地克彦

燃料電池2011夏号　11　(1)　112-128　2011/07
in situマイクロXAS法を用いたSOFC空気極/電解質界面における酸素ポテンシャル分布評価

雨澤浩史, 伊奈稔哲, 中尾孝之, 折笠有基, 宇根本篤, 井口史匡, 寺田靖子, 川田達也, 湯上浩雄, 内本喜晴

電気化学会大会講演要旨集　78th(CD-ROM)　2011
Material Stability and Cation Transport of La0.6Sr0.4Co0.2Fe0.8O3-delta in SOFC Cathodic Conditions

M. Oh, A. Unemoto, K. Amezawa, T. Kawada

SOLID OXIDE FUEL CELLS 12 (SOFC XII)　35　(1)　2249-2253　2011

DOI： 10.1149/1.3570220 　

ISSN： 1938-5862
Mechanical properties evaluation method for non-stoichiometric materials under high temperature and oxidizing/reducing conditions

Satoshi Watanabe, Kazuhisa Sato, Yohei Takeyama, Fumitada Iguchi, Keiji Yashiro, Koji Amezawa, Hiroo Yugami, Toshiyuki Hashida, Junichiro Mizusaki, Tatsuya Kawada

Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A　77　(780)　1357-1366　2011

DOI： 10.1299/kikaia.77.1357 　

ISSN： 0387-5008
Mechanical Properties of Ce0.9Gd0.1O2-delta at High Temperatures under Controlled Atmospheres

Takuto Kushi, Kazuhisa Sato, Atsushi Unemoto, Koji Amezawa, Tatsuya Kawada

SOLID OXIDE FUEL CELLS 12 (SOFC XII)　35　(1)　1145-1149　2011

DOI： 10.1149/1.3570096 　

ISSN： 1938-5862
J0802-4-2 Investigation of Mechanical Properties of SOFC Electrolytes at High Temperature

KUSHI Takuto, WATANABE Satoshi, SATO Kazuhisa, IGUCHI Fumitada, UNEMOTO Atsushi, AMEZAWA Koji, HASHIDA Toshiyuki, YUGAMI Hiroo, KAWADA Tatsuya

2010　(7)　231-232　2010/09/04
Publisher: The Japan Society of Mechanical Engineers

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Elastic modulus of typical electrolyte materials for solid oxide fuel cells, (Gd_2O_3)_<0.05>(CeO_2)_<0.9>, (Y_20_3)_<0.08>(Zr0_2)_<0.92>, La_<0.8>Sr_<0.2>Ga_<0.8>Mg_<0.15>Co_<0.05>O_<3-δ>, were evaluated by resonance method, small punch test and 4 point bending test. The measurements were carried out from room temperature to 1273 K under p(O_2)=10^<-4> atm. Elastic modulus of (Y_20_3)_<0.08>(Zr0_2)_<0.92> and La_<0.8>Sr_<0.2>Ga_<0.8>Mg_<0.15>Cp_<0.05>O_<3-δ> drastically decreased in the temperature range between 573 K and 873 K in resonance method. Similar dependencies were seen in 4 point bending test and small punch test. It was found that that elastic modulus by dynamic (resonance method) shows similar temperature dependency as those by static (small punch and 4 point bending tests) measurement techniques, although its absolute values were slightly different. It was demonstrated that the dynamic measurement technique is very useful for evaluating mechanical properties of SOFC materials as well as static measurement techniques.
固体酸化物形燃料電池(SOFC)の電極反応

雨澤浩史, 伊奈稔哲, 折笠有基, 宇根本篤, 井口史匡, 谷田肇, 宇留賀朋哉, 湯上浩雄, 川田達也, 内本喜晴

応用物理学会学術講演会講演予稿集(CD-ROM)　71st　2010
高速時間分解その場XAS測定を用いたSOFCカソード反応の解析

雨澤浩史, 伊奈稔哲, 折笠有基, 宇根本篤, 宇留賀朋哉, 谷田肇, 川田達也, 内本喜晴

固体イオニクス討論会講演要旨集　36th　2010
その場X線吸収分光法を用いたイオン導電性材料の局所・電子構造解析

雨澤浩史, 宇根本篤, 井口史匡, 湯上浩雄, 川田達也, 伊奈稔哲, 折笠有基, 福塚友和, 谷田肇, 内本喜晴, 山田淳夫, 寺田靖子, 宇留賀朋哉

資源・素材　2010　(2)　2010

ISSN： 0919-7915
X線吸収分光法を用いた固体酸化物形燃料電池における電極反応のその場測定

雨澤浩史, 折笠有基, 伊奈稔哲, 宇根本篤, 井口史匡, 谷田肇, 宇留賀朋哉, 寺田靖子, 湯上浩雄, 川田達也, 内本喜晴

化学系学協会東北大会プログラムおよび講演予稿集　2010　2010
EVALUATION OF MECHANICAL PROPERTIES OF SOFC COMPONENTS BY NANO-INDENTATION TESTS

Hideaki Ito, Kazuhisa Sato, Atsushi Unemoto, Koji Amezawa, Tatsuya Kawada

PROCEEDINGS OF THE ASME 8TH INTERNATIONAL CONFERENCE ON FUEL CELL SCIENCE, ENGINEERING, AND TECHNOLOGY 2010, VOL 2　2　381-385　2010

DOI： 10.1115/FuelCell2010-33158 　
The Electronic and Local Structure Analysis of the Electrolyte/Electrode Interface of Intermediate-Temperature SOFC by Depth Resolved XAFS

中尾孝之, 伊奈稔哲, 折笠有基, 福塚友和, 寺田靖子, 谷田肇, 宇留賀朋哉, 高垣昌史, 豊川秀訓, 雨澤浩史, 川田達也, 嶺重温, 内本喜晴

固体イオニクス討論会講演要旨集　35th　122-123　2009/12/07
Electronic and local structures of Nd2NiO4 epitaxial thin film studied by depth-resolved XAFS measurements

雨澤浩史, 伊奈稔哲, 折笠有基, 福塚友和, 山田淳夫, 宇根本篤, 高垣昌史, 宇留賀朋哉, 谷田肇, 豊川秀訓, 寺田靖子, 川田達也, 内本喜晴

固体イオニクス討論会講演要旨集　35th　128-129　2009/12/07
深さ分解XAFS測定による中温作動型SOFCの電極/電解質界面の解析

福塚友和, 中尾孝之, 折笠有基, 伊奈稔哲, 寺田靖子, 谷田肇, 宇留賀朋哉, 高垣昌史, 豊川秀訓, 雨澤浩史, 川田達也, 嶺重温, 内本喜晴

電池討論会講演要旨集　50th　499　2009/11/30
Nd₂NiO_4+δ配向性単結晶薄膜の深さ分解XAFS測定

雨澤浩史, 折笠有基, 伊奈稔哲, 福塚友和, 山田淳夫, 高垣昌史, 宇留賀朋哉, 谷田肇, 豊川秀訓, 寺田靖子, 川田達也, 内本喜晴

電気化学会大会講演要旨集　76th　313　2009/03/29
Potential distribution in a ZrO₂-based solid electrolyte studied by in-situ micro x-ray absorption spectroscopy

雨澤浩史, 伊奈稔哲, 折笠有基, 宇根本篤, 渡邉秀貴, 井口史匡, 福塚友和, 川田達也, 寺田靖子, 湯上浩雄, 内本喜晴

固体イオニクス討論会講演要旨集　35th　2009
Surface reaction and transport kinetics of hydrogen through palladium-based membranes under gas co-existing with hydrogen atmospheres

Atsushi Unemoto, Nobuyuki Hirai, Atsushi Kaimai, Kazuhisa Sato, Takanori Otake, Keiji Yashiro, Junichiro Mizusaki, Tatsuya Kawada, Tatsuya Tsuneki, Yoshinori Shirasaki, Yoshu Ota, Isamu Yasuda

International Journal of Nuclear Hydrogen Production and Applications　2　(1)　55-68　2009
Deformation and fracture characteristics of zirconia and ceria-based electrolytes for SOFCs under reducing atmospheres

T. Hashida, K. Sato, Y. Takeyama, T. Kawada, J. Mizusaki

ECS Transactions　25　(2)　1565-1572　2009

DOI： 10.1149/1.3205692 　

ISSN： 1938-5862 1938-6737
Depth-resolved XAFS measurements of Nd2NiO4+.DELTA. epitaxial thin films

雨澤浩史, 折笠有基, 伊奈稔哲, 福塚友和, 山田淳夫, 高垣昌史, 宇留賀朋哉, 谷田肇, 豊川秀訓, 寺田靖子, 川田達也, 内本喜晴

固体イオニクス討論会講演要旨集　34th　101-102　2008/12/03
GS0606 Effects of reducing treatment on mechanical properties of SOFC components

TAKEYAMA Yohei, SATO Kazuhisa, KAWADA Tatsuya, HASHIDA Toshiyuki, MIZUSAKI Junichiro

2008　"GS0606-1"-"GS0606-2"　2008/09/16
Publisher: The Japan Society of Mechanical Engineers
ランタンコバルト酸化物カソード材料のin situマイクロXAFS測定

雨澤浩史, 佐瀬摩耶, 渡邉秀貴, 宇根本篤, 川田達也, 折笠有基, 青木潤珠, 福塚友和, 内本喜晴, 寺田靖子

電気化学会大会講演要旨集　75th　2008
Effect of chemically-induced expansion on damage of solid oxide fuel cell

Kazuhisa Sato, Keiji Yashiro, Toshiyuki Hashida, Tatsuya Kawada, Hiroo Yugami, Junichiro Mizusaki

Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A　74　68-74　2008/01/01

ISSN： 0387-5008
X-ray absorption spectroscopic studies on electronic structure in La 0.6Sr0.4Co0.8Fe0.2O 3-δ perovskite-type oxides

Yuki Orikasa, Toshiaki Ina, Tomokazu Fukutsuka, Koji Amezawa, Tatsuya Kawada, Yoshiharu Uchimoto

ECS Transactions　13　(26)　201-205　2008

DOI： 10.1149/1.3050392 　

ISSN： 1938-5862 1938-6737
The design concept for high-temperature photo-electronic devices using SrTiO3

F. Horikiri, K. Sato, K. Yashiro, T. Kawada, J. Mizusaki

ECS Transactions　16　(51)　459-469　2008

DOI： 10.1149/1.3242262 　

ISSN： 1938-5862 1938-6737
Carbon deposition and electrochemical reaction of anode for SOFC in methane containing atmosphere

Keiji Yashiro, Mitsunari Takase, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

ECS Transactions　16　(51)　213-218　2008

DOI： 10.1149/1.3242236 　

ISSN： 1938-5862 1938-6737
The barrier formation mechanism on SrTiO3 for high-temperature photo-electronic devices

F. Horikiri, T. Ichikawa, K. Sato, K. Yashiro, T. Kawada, J. Mizusaki

ECS Transactions　16　(51)　451-458　2008

DOI： 10.1149/1.3242261 　

ISSN： 1938-5862 1938-6737
Investigation on Electronic and Local Structures in SOFC Oxide Cathodes by In Situ Micro XAFS Measurements

雨澤浩史, 宇根本篤, 佐瀬摩耶, 川田達也, 折笠有基, 内本喜晴, 寺田靖子

固体イオニクス討論会講演要旨集　33rd　2007
SOFCカソード材料のin situマイクロXAFS測定

雨澤浩史, 宇根本篤, 川田達也, 折笠有基, 内本喜晴, 寺田靖子

電気化学秋季大会講演要旨集　2007　2007
Effects of Co-existing Gas with Hydrogen on Surface Reaction Rate of Palladium-Silver Membranes for Hydrogen Separation

Atsushi UNEMOTO, Atsushi KAIMAI, Kazuhisa SATO, Takanori OTAKE, Keiji YASHIRO, Junichiro MIZUSAKI, Tatsuya KAWADA, Tatsuya TSUNEKI, Yoshinori SHIRASAKI, Yoshu OTA, Isamu YASUDA

水素エネルギーシステム　32　(2)　34-39　2007
ELECTROCHEMICAL CHARACTARIZATION AND IDENTIFICATION OF REACTION SITES IN OXIDE ANODES

T. Nakamura, K. Yashiro, A. Kaimai, T. Otake, K. Sato, G. J. Park, T. Kawada, J. Mizusaki

ADVANCES IN SOLID OXIDE FUEL CELLS II　27　(4)　193-198　2007

ISSN： 0196-6219
Studies of Oxygen Exchange on Thin-Film La0.6Sr0.4CoO3-delta Using Nonlinear Electrochemical Impedance Spectroscopy (NLEIS)

Jamie R. Wilson, Maya Sase, Tatsuya Kawada, Stuart B. Adler

SOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2　7　(1)　1089-1096　2007

DOI： 10.1149/1.2729206 　

ISSN： 1938-5862
Hydrogen permeability of palladium alloy membrane at high temperatures in the impurity gases co-existing atmospheres

A. Unemoto, A. Kaimai, T. Otake, K. Yashiro, T. Kawada, J. Mizusaki, T. Tsuneki, I. Yasuda

16th World Hydrogen Energy Conference 2006, WHEC 2006　4　3113-3121　2006/12/01
高温電気化学in situ XAFS測定装置の開発 (1)-高温電極の過電圧とXAFS測定

川田達也, 開米篤志, 雨澤浩史, 内本喜晴, 寺田靖子

電気化学秋季大会講演要旨集　2006　2006
Electrode Performance and Reaction Sites of Mixed Conducting Oxide Anode

T.Nakamura, K.Yashiro, A.Kaimai, T.Otake, K.Sato, G.J.Park, T.Kawada, J. Mizusaki

7th European Solid Oxide Fuell Cell Forum　2006
Electrical Conductivity and Defect Structure of Perovskite Oxide La0.9Ca0.1(Cr, Al)O3

Keiji Yashiro, Mamoru Hasegawa, Eiki Niwa, Kazuhisa Sato, Atsushi Kaimai, Takanori Otake, Tatsuya Kawada, Junichiro MIzusaki

7th European Solid Oxide Fuell Cell Forum (CD-ROM)　P809-　2006
Fast¹⁸O Incorporation Paths along the Hetero Phase Boundary with (La, Sr)₂CoO₄

M.Sase, F.Hermes, K.Yashiro, T.Otake, A.Kaimai, T.Kawada, J.Mizusaki, N.Sakai, K.Yamaji, H.Yokokawa

Proceedings of the 7th Euro Solid Oxide Fuel Cell Forum　B0666-　2006
Electronic structure of proton conducting BaCe0.90Y0.10O3-delta

T Higuchi, T Tsukamoto, H Matsumoto, T Shimura, K Yashiro, Kawada, T, J Mizusaki, S Shin, T Hattori

SOLID STATE IONICS　176　(39-40)　2967-2970　2005/12

DOI： 10.1016/j.ssi.2005.09.032 　

ISSN： 0167-2738

eISSN： 1872-7689
Resistance of (La, Sr)CoO<inf>3</inf>/ YSZ interface with a ceriainterlayer

T. Kawada, D. Ueno, M. Sase, K. Yashiro, T. Otake, A. Kaimai, J. Mizusaki

Proceedings - Electrochemical Society　PV 2005-07　1695-1702　2005/12/01
Temperature distribution analysis of air preheating in a honeycomb SOFC

Zhenwei Wang, Akira Toriyama, Yohtaro Yamazaki, Junichiro Mizusaki, Tatsuya Kawada, Tatsumi Ishihara

Proceedings - Electrochemical Society　PV 2005-07　876-884　2005/12/01
Electrochemical performance of oxide anode materials and catalytic effect of current collector

Keiji Yashiro, Takashi Nakamura, Atsushi Kaimai, Takanori Otake, Tatsuya Kawada, Junichiro Mizusaki

Proceedings - Electrochemical Society　PV 2005-07　1369-1375　2005/12/01
Evaluation of elastic property of (CeO 2) 1-x(YO 1.5)x ceramics

Kazuhisa Sato, Toshiyuki Hashida, Ken Suzuki, Hiroo Yugami, Tatsuya Kawada, Junichiro Mizusaki

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　52　(11)　840-844　2005/11

DOI： 10.2497/jjspm.52.840 　

ISSN： 0532-8799
Evaluation of fracture behavior of (CeO 2) 1-x(SmO 1.5) x based solid oxide fuel cell laminates

Kazuhisa Sato, Toshiyuki Hashida, Keiji Yashiro, Hiroo Yugami, Tatsuya Kawada, Junichiro Mizusaki

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　52　(11)　836-839　2005/11

DOI： 10.2497/jjspm.52.836 　

ISSN： 0532-8799
213 Fracture Behavior of Ceria-based SOFCs under Simulated Operating Conditions

OMURA Hajime, SATO Kazuhisa, HASHIDA Toshiyuki, YUGAMI Hiroo, YASHIRO Keiji, KAWADA Tatsuya, MIZUSAKI Junichiro

2005　(40)　76-77　2005/03/15
Publisher: The Japan Society of Mechanical Engineers
214 Prediction of Elastic Modulus of Ceria based Ceramic Composites for SOFCs by Molecular Dynamics

SATO Kazuhisa, SUZUKI Ken, HASHIDA Toshiyuki, YUGAMI Hiroo, KAWADA Tatsuya, MIZUSAKI Junichiro

2005　(40)　78-79　2005/03/15
Publisher: The Japan Society of Mechanical Engineers
CaF₂から真空中へのF^-イオンの放出特性

酒井孝明, 開米篤志, 大竹隆憲, 八代圭司, 川田達也, 水崎純一郎, 西岡将輝

電気化学会大会講演要旨集　72nd　2005
Emission Characteristics of F^- ions into Vacuum from Fluoride Ionic Conductor

酒井孝明, 開米篤志, 大竹孝憲, 八代圭司, 川田達也, 水崎純一郎, 西岡将輝

固体イオニクス討論会講演要旨集　31st　2005
Mechanical Damage Evaluation of Solid Oxide Fuel Cells under Simulated Operationing Conditions

Kazuhisa Sato, Toshiyuki Hashida, Keiji Yashiro, Hiroo Yugami, Tatsuya Kawada, Junichiro Mizusaki

Journal of Ceramic Society of Japan　113　(1320)　562-564　2005

DOI： 10.2109/jcersj.113.562 　

ISSN： 0914-5400 1882-1022
Oxygen Reduction Kinectics on Oxide Electrodes

Tatsuya Kawada, Maya Sase, Keiji Yashiro, Takanori Otake, Atsushi Kaimai, Junichiro Mizusaki

Solid State Electrochemistry, Proceedings of 26th Risoe International Symposiumon Materials Science, S. Linderoth et al. (Eds.)　2005
Mixed protonic-electronic conduction properties of SrZr0.9-xY0.1RuxO3-alpha

H Matsumoto, T Shimura, T Higuchi, T Otake, Y Sasaki, K Yashiro, A Kaimai, T Kawada, J Mizusaki

ELECTROCHEMISTRY　72　(12)　861-864　2004/12

ISSN： 1344-3542
Development of performance evaluation testing method for SOFC

K. Sato, H. Omura, T. Hashida, K. Yashiro, T. Kawada, J. Mizusaki, H. Yugami, A. Atkinson

Proceedings - Electrochemical Society　PV 2004-16　170-176　2004/12/01
High temperature photovoltaic effect at the interface of ITO / Nb doped SrTiO3

Fumimasa Horikiri, Tomoyuki Ichikawa, Atsushi Kaimai, Keiji Yashiro, Hiroshige Matsumoto, Tatsuya Kawada, Junichiro Mizusaki

Proceedings - Electrochemical Society　PV 2004-16　203-209　2004/12/01
Microscopic observation of SOFC anodes under operation with hydrocarbon fuels

Tatsuya Kawada, Keiji Yashiro, Tomoaki Taura, Kenichiro Takeda, Atsushi Kaimai, Hiroshige Matsumoto, Junichiro Mizusaki, H. Yugami

Fuel Cell Science, Engineering and Technology - 2004　53-59　2004/09/13
Electronic structure of protonic conductor BaCe0.90Y0.10O3-delta probed by soft-X-ray spectroscopy

T Higuchi, H Matsumoto, T Shimura, K Yashiro, T Kawada, J Mizusaki, S Shin, T Tsukamoto

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS　43　(6A)　L731-L734　2004/06

DOI： 10.1143/JJAP.43.L731 　

ISSN： 0021-4922
New in situ characterization of SOFC electrode

T Kawada, K Yashiro

ELECTROCHEMISTRY　72　(5)　343-348　2004/05

ISSN： 1344-3542
DEFECT STRUCTURE AND OXYGEN DIFFUSIVITY OF DONOR DOPED CERIA

Keiji Yashiro, Takeo Suzuki, Mamoru Hasegawa, Atsushi Kaimai, Hiroshige Matsumoto, Tatsuya Kawada, Junichiro Mizusaki, Teruhisa Horita, Harumi Yokokawa

Electrochemical Society Proceedings　PV2004　(25)　210-217　2004
Solid Oxide Fuel Cells with a zirconia electrolyte

Junichiro Mizusaki, Tatsuya Kawada, Keiji Yashiro

FC report　21　168-174　2003/04
Electrical properties of the surface layer formed on the Nb-doped SrTiO3 single crystal

LQ Han, N Iizawa, Y Chiba, T Yoneta, A Kaimai, K Yashiro, H Yugami, Y Nigara, T Kawada, J Mizusaki

CERAMIC INTERFACES: PROPERTIES AND APPLICATIONS V　253　29-41　2003

ISSN： 1013-9826
Oxygen transport at the hetero interfaces of electrochemical ceramic devices

T Horita, K Yamaji, N Sakai, T Kato, T Kawada, H Yokokawa

CERAMIC INTERFACES: PROPERTIES AND APPLICATIONS V　253　179-196　2003

ISSN： 1013-9826
Emission characteristics of O- ions from a bare surface of yttria-stabilized zirconia (YSZ) at elevated temperatures

Y Fujiwara, A Kaimai, JO Hong, K Yashiro, Y Nigara, T Kawada, J Mizusaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS　41　(6A)　L657-L659　2002/06

DOI： 10.1143/JJAP.41.L657 　

ISSN： 0021-4922
Application of Novel SIMS Technique for Imaging the Active Sites of Oxygen Reduction at the SOFC Cathode/Electrolyte Interfaces

Teruhisa Horita, Katsuhiko Yamaji, Natsuko Sakai, Yueping Xiong, Harumi Yokokawa, Tatsuya Kawada

IONICS　8　(1-2)　108-117　2002/01

DOI： 10.1007/BF02377760 　

ISSN： 0947-7047
Application of SOFC to Electric Vehicles

T. Kawada

Bulletin of the Ceramic Society of Japan　36　489-492　2001/04
Property of (La, Ca) CrO3 for interconnection in solid oxide fuel cell (Part 2) - Durability

Haruo Nishiyama, Masanobu Aizawa, Natsuko Sakai, Harumi Yokokawa, Tatsuya Kawada, Masayuki Dokiya

Journal of the Ceramic Society of Japan　109　(1270)　527-534　2001
Publisher: Ceramic Society of Japan
DOI： 10.2109/jcersj.109.1270_527 　

ISSN： 0914-5400
Oxygen Permeation Mechanism in Lanthanum Chromites, La <inf>1-x</inf>Ca <inf>x</inf>CrO <inf>3-δ</inf>

Natsuko Sakai, Katsuhiko Yamaji, Teruhisa Horita, Harumi Yokokawa, Tatsuya Kawada, Masayuki Dokiya

Busshitu Kogaku Kogyo Gijutsu Kenkyusho Hokoku/Journal of the National Institute of Materials and Chemical Research　8　77-87　2000/12/01

ISSN： 0919-7087
特別講演協奏反応場での特異化学ポテンシャルの解明とガスセンシングへの展開

水崎純一郎, 八代圭司, 川田達也

Proceedings of the Chemical Sensor Symposium　31　88-90　2000/09
Publisher: 電気化学会化学センサ研究会
Concept and technology of SOFC for electric vehicles

J Van herle, R Ihringer, NM Sammes, G Tompsett, K Kendall, K Yamada, C Wen, T Kawada, M Ihara, J Mizusaki

SOLID STATE IONICS　132　(3-4)　333-342　2000/07

ISSN： 0167-2738
Influence of the coexisting gases on the electrochemical reaction rates between 873 and 1173 K in a CH4-H2O/Pt/YSZ system

S Onuma, A Kaimai, K Kawamura, Y Nigara, T Kawada, J Mizusaki, H Tagawa

SOLID STATE IONICS　132　(3-4)　309-331　2000/07

ISSN： 0167-2738
Nonstoichiometry of Zr0.164Ce0.654Y0.182O1.91-delta

T Otake, H Yugami, K Kawamura, Y Nigara, T Kawada, J Mizusaki

ELECTROCHEMISTRY　68　(6)　451-454　2000/06

ISSN： 1344-3542
Techiniques in Electrochemical Measurement, Potential Measurement (Reference Electrode:SOlid Electrolyte)

Tatsuya Kawada

Electrochemistry　68　666-670　2000/04
CO sensing mechanism with chemical potential shifting on Au/YSZ interface

Keiji Yashiro, Masakazu Kudo, Hiroki Matsumoto, Atsushi Kaimai, Yutaka Nigara, Tatsuya Kawada, Junichiro Mizusaki, Kenichi Kawamura

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　47　(9)　1026-1031　2000
Publisher: Funtai Funmatsu Yakin Kyokai
DOI： 10.2497/jjspm.47.1026 　

ISSN： 0532-8799
金/安定化ジルコニア系での一酸化炭素を含む非平衡ガスの電極反応

水崎純一郎, 川田達也, 開米篤志

Proceedings of the Chemical Sensor Symposium　(28)　22-24　1999/03
Publisher: 電気化学協会化学センサ研究会
High temperature transport properties at metal/SrTiO3 interfaces

T Kawada, N Iizawa, M Tomida, A Kaimai, K Kawamura, Y Nigara, J Mizusaki

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY　19　(6-7)　687-691　1999

ISSN： 0955-2219
Hydrogen permeability in (CeO2)(0.9)(CaO)(0.1) at high temperatures

Y Nigara, J Mizusaki, K Kawamura, T Kawada, M Ishigame

SOLID STATE IONICS　113　347-354　1998/12

ISSN： 0167-2738
Electrochemical oxidation in a CH4-H2O system at the interface of a Pt electrode and Y2O3-stabilized ZrO2 electrolyte II. The rates of electrochemical reactions taking place in parallel

S Onuma, A Kaimai, K Kawamura, Y Nigara, T Kawada, J Mizusaki, H Inaba, H Tagawa

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　145　(9)　3117-3122　1998/09

ISSN： 0013-4651
Oxygen surface exchange of Y0.2Ce0.8O2-x under reducing atmosphere

T Horita, K Yamaji, N Sakai, M Ishikawa, H Yokokawa, T Kawada, M Dokiya

ELECTROCHEMICAL AND SOLID STATE LETTERS　1　(1)　4-6　1998/07

ISSN： 1099-0062
High temperature transport properties in SrTiO3 under an oxygen potential gradient

T Kawada, T Watanabe, A Kaimai, K Kawamura, Y Nigara, J Mizusaki

SOLID STATE IONICS　108　(1-4)　391-402　1998/05

ISSN： 0167-2738
Electrochemical oxidation in a CH4-H2O system at the interface of a Pt electrode and Y2O3-stabilized ZrO2 electrolyte: I. Determination of the predominant reaction process

Shigenori Onuma, Atsushi Kaimai, Ken-Ichi Kawamura, Yutaka Nigara, Tatsuya Kawada, Junichiro Mizusaki, Hideaki Inaba, Hiroaki Tagawa

Journal of the Electrochemical Society　145　(3)　920-925　1998
Publisher: Electrochemical Society Inc.
DOI： 10.1149/1.1838367 　

ISSN： 0013-4651
Electric properties of [(ZrO2)0.8(CeO2)0.2] 0.9(CaO)0.1 solid solution

Ken-Ichi Kawamura, Kensuke Watanabe, Yutaka Nigara, Atsushi Kaimai, Tatsuya Kawada, Junichiro Mizusaki

Journal of the Electrochemical Society　145　(7)　2552-2558　1998
Publisher: Electrochemical Society Inc.
DOI： 10.1149/1.1838678 　

ISSN： 0013-4651
Active sites imaging for oxygen reduction at the La0.9Sr0.1MnO3-x/yttria-stabilized zirconia interface by secondary-ion mass spectrometry

Teruhisa Horita, Katsuhiko Yamaji, Masahiko Ishikawa, Natsuko Sakai, Harumi Yokokawa, Tatsuya Kawada, Tohru Kato

Journal of the Electrochemical Society　145　(9)　3196-3202　1998
Publisher: Electrochemical Soc Inc
DOI： 10.1149/1.1838786 　

ISSN： 0013-4651
Novel oxygen sensor based on a metal-metal oxide scale system

Ken-Ich Kawamura, Atsushi Kaimai, Yutaka Nigara, Tatsuya Kawada, Junichiro Mizusaki

Journal of Electroceramics　2　(3)　151-156　1998
Publisher: Kluwer Academic Publishers
DOI： 10.1023/A:1009991331051 　

ISSN： 1385-3449
Ceria-Zirconia Composite Electrolyte for Solid Oxide Fuel Cells

Teruhisa Horita, Natsuko Sakai, Harumi Yokokawa, Masayuki Dokiya, Tatsuya Kawada, Jan Van Herle, Kazutaka Sasaki

Journal of Electroceramics　1　155-164　1997/12/01

ISSN： 1385-3449
Materials and characterization of solid oxide fuel cell

T Kawada, H Yokokawa

ELECTRICAL PROPERTIES OF OXIDE MATERIALS　125-1　187-248　1997

ISSN： 1013-9826
Materials and characterization of solid oxide fuel cell

T Kawada, H Yokokawa

ELECTRICAL PROPERTIES OF OXIDE MATERIALS　125-1　187-248　1997

ISSN： 1013-9826
Fabrication of planar solid oxide fuel cell by composite plate process

Rak Hyun Song, Teruhisa Horita, Natsuko Sakai, Tatsuya Kawada, Harumi Yokokawa, Masayuki Dokiya

Denki Kagaku　64　614-619　1996/12/01

ISSN： 0366-9297
Fabrication of planar solid oxide fuel cell by composite plate process

Rak Hyun Song, Teruhisa Horita, Natsuko Sakai, Tatsuya Kawada, Harumi Yokokawa, Masayuki Dokiya

Electrochemistry　64　614-619　1996/12/01

ISSN： 1344-3542
The solid electrolyte membranes and the system to produce hydrogen from thermally decomposed water by solar energy

NIGARA Y., WATANABE K., KAWAMURA K., KAWADA T., MIZUSAKI J., ISHIGAME M.

1996　189-192　1996/10/27
CHEMICAL-POTENTIAL DIAGRAMS FOR FE-CR-LI-K-C-O SYSTEM - THERMODYNAMIC ANALYSIS ON REACTION PROFILES BETWEEN ALLOYS AND ALKALI CARBONATES

H YOKOKAWA, N SAKAI, T KAWADA, M DOKIYA, K OTA

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　140　(12)　3565-3577　1993/12

DOI： 10.1149/1.2221127 　

ISSN： 0013-4651
Effect of preparation method on chemical stability of sinterable calcium doped lanthanum chromites

Natsuko Sakai, Tatsuya Kawada, Harumi Yokokawa, Masayuki Dokiya

Journal of the Ceramic Society of Japan. International ed.　101　1164-1169　1993/11/01

ISSN： 0912-9200
Liquid‐Phase‐Assisted Sintering of Calcium‐Doped Lanthanum Chromites

Natsuko Sakai, Tatsuya Kawada, Harumi Yokokawa, Masayuki Dokiya, Isao Kojima

Journal of the American Ceramic Society　76　(3)　609-616　1993

DOI： 10.1111/j.1151-2916.1993.tb03649.x 　

ISSN： 1551-2916 0002-7820
Oxygen permeation modelling of La1-yCayCrO3-δ

Bart A. van Hassel, Tatsuya Kawada, Natsuko Sakai, Harumi Yokokawa, Masayuki Dokiya

Solid State Ionics　66　(1-2)　41-47　1993

DOI： 10.1016/0167-2738(93)90026-Y 　

ISSN： 0167-2738
Effect of preparation method on chemical; stability of sinterable calcium doped lanthanum chromites

Natsuko Sakai, Tatsuya Kawada, Harumi Yokokawa, Masayuki Dokiya

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan　101　(1179)　1195-1200　1993

DOI： 10.2109/jcersj.101.1195 　

ISSN： 0914-5400
Oxygen permeation modelling of perovskites

Bart A. van Hassel, Tatsuya Kawada, Natsuko Sakai, Harumi Yokokawa, Masayuki Dokiya, Henny J.M. Bouwmeester

Solid State Ionics　66　(3-4)　295-305　1993

DOI： 10.1016/0167-2738(93)90419-4 　

ISSN： 0167-2738
Comment using chemical equilibria calculation on discussion about 'synthesis of titanium nitride whiskers from potassium fluorotitanate (IV)

Harumi Yokokawa, Natsuko Sakai, Tatsuya Kawada, Masayuki Dokiya

Journal of the Ceramic Society of Japan. International ed.　100　979-981　1992/07/01

ISSN： 0912-9200
Reaction between solid oxide fuel cell materials

Tatsuya Kawada, Natsuko Sakai, Harumi Yokokawa, Masayuki Dokiya, Iwao Anzai

Solid State Ionics　50　(3-4)　189-196　1992

DOI： 10.1016/0167-2738(92)90218-E 　

ISSN： 0167-2738
Fabrication of a planar solid oxide fuel cell by tape-casting and co-firing method

Tatsuya Kawada, Natsuko Sakai, Harumi Yokokawa, Masayuki Dokiya, Iwao Anzai

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan　100　(1162)　847-850　1992

DOI： 10.2109/jcersj.100.847 　

ISSN： 0914-5400
Electrical properties of transition-metal-doped YSZ

T. Kawada, N. Sakai, H. Yokokawa, M. Dokiya

Solid State Ionics　53-56　(1)　418-425　1992

DOI： 10.1016/0167-2738(92)90409-I 　

ISSN： 0167-2738
CHEMICAL-POTENTIAL DIAGRAM OF AL-TI-C SYSTEM - AL4C3 FORMATION ON TIC FORMED IN AL-TI LIQUIDS CONTAINING CARBON

H YOKOKAWA, N SAKAI, T KAWADA, M DOKIYA

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　22　(12)　3075-3076　1991/12

DOI： 10.1007/BF02650270 　

ISSN： 0360-2133
Thermodynamic stability of perovskites and related compounds in some alkaline earth-transition metal-oxygen systems

Harumi Yokokawa, Natsuko Sakai, Tatsuya Kawada, Masayuki Dokiya

Journal of Solid State Chemistry　94　(1)　106-120　1991

DOI： 10.1016/0022-4596(91)90225-7 　

ISSN： 1095-726X 0022-4596
Chemical Thermodynamic Considerations in Sintering of LaCrO3-Based Perovskites

Harumi Yokokawa, Natsuko Sakai, Tatsuya Kawada, Masayuki Dokiya

Journal of the Electrochemical Society　138　(4)　1018-1027　1991

DOI： 10.1149/1.2085708 　

ISSN： 1945-7111 0013-4651
Thermodynamic Analysis of Reaction Profiles Between LaMO3(M=Ni, Co, Mn) and ZrO2

Harumi Yokokawa, Natsuko Sakai, Tatsuya Kawada, Masayuki Dokiya

Journal of the Electrochemical Society　138　(9)　2719-2727　1991

DOI： 10.1149/1.2086043 　

ISSN： 1945-7111 0013-4651
CHARACTERISTICS OF SLURRY-COATED NICKEL ZIRCONIA CERMET ANODES FOR SOLID OXIDE FUEL-CELLS

T KAWADA, N SAKAI, H YOKOKAWA, M DOKIYA, M MORI, T IWATA

JOURNAL OF THE ELECTROCHEMICAL SOCIETY　137　(10)　3042-3047　1990/10

DOI： 10.1149/1.2086156 　

ISSN： 0013-4651
SINTERABILITY AND ELECTRICAL-CONDUCTIVITY OF CALCIUM-DOPED LANTHANUM CHROMITES

N SAKAI, T KAWADA, H YOKOKAWA, M DOKIYA, T IWATA

JOURNAL OF MATERIALS SCIENCE　25　(10)　4531-4534　1990/10

DOI： 10.1007/BF00581119 　

ISSN： 0022-2461

eISSN： 1573-4803
Generalized Electrochemical Potential Diagrams for Complex Aqueous (M-X-H-O-e−) Systems

Harumi Yokokawa, Natsuko Sakai, Tatsuya Kawada, Masayuki Dokiya

Journal of the Electrochemical Society　137　(2)　388-398　1990

DOI： 10.1149/1.2086451 　

ISSN： 1945-7111 0013-4651
Chemical Potential Diagrams for Rare Earth‐Transition Metal‐Oxygen Systems: I, Ln‐V‐O and Ln‐Mn‐O System

Harumi Yokokawa, Natsuko Sakai, Tatsuya Kawada, Masayuki Dokiy

Journal of the American Ceramic Society　73　(3)　649-658　1990

DOI： 10.1111/j.1151-2916.1990.tb06567.x 　

ISSN： 1551-2916 0002-7820
Fabrication of a planar solid oxide fuel cell

M. Dokiya, N. Sakai, T. Kawada, H. Yokokawa, T. Iwata, M. Mori

Proceedings of the Intersociety Energy Conversion Engineering Conference　3　1547-1551　1989/12/01

ISSN： 0146-955X
THERMODYNAMIC REGULARITIES IN PEROVSKITE AND K2NIF4 COMPOUNDS

H YOKOKAWA, T KAWADA, M DOKIYA

JOURNAL OF THE AMERICAN CERAMIC SOCIETY　72　(1)　152-153　1989/01

DOI： 10.1111/j.1151-2916.1989.tb05971.x 　

ISSN： 0002-7820
Construction of Chemical Potential Diagrams for Metal‐Metal‐Nonmetal Systems: Applications to the Decomposition of Double Oxides

Harumi Yokokawa, Tatsuya Kawada, Masayuki Dokiya

Journal of the American Ceramic Society　72　(11)　2104-2110　1989

DOI： 10.1111/j.1151-2916.1989.tb06039.x 　

ISSN： 1551-2916 0002-7820
金属-酸素-硫黄系の一般的化学ポテンシャル図

横川晴美, 川田達也, 土器屋正之

電気化学および工業物理化学　56　(9)　p751-756　1988/09
Publisher: 電気化学会
ISSN： 1344-3542
Ionic conductivity of montmorillonite/alkali salt mixtures

Tatsuya Kawada, Harumi Yokokawa, Masayuki Dokiya

Solid State Ionics　28-30　(1)　210-213　1988

DOI： 10.1016/S0167-2738(88)80035-3 　

ISSN： 0167-2738

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Books and Other Publications 10

High-temperature Solid Oxide Fuel Cells for the 21st Century, 2nd Edition

Tatsuya Kawada, Teruhisa Horita, Kevin Kendall, Michaela Kendall ed

Elsevier　2015/11/16
Topical Themes in Energy and Resources

Tatsuya Kawada, Yasumitsu Tanaka, Michael Norton, Yu-You Li

Springer　2015/01/01
Fuel Cells and Hydrogen Energy Perovskite Oxide for Solid Oxide Fuel Cells

Tatsuya Kawada

Springer　2009/04
Handbook of Fuel Cells, Fundamentals, Technology and Applications, Vol.6, Advances in Electrocatalysis, Materials, Diagnostics and Durability: Part 2

T. Kawada

John Wiley and Sons, Ltd.　2009
新材料・新素材シリーズナノイオニクスー最新技術とその展望ー

川田達也

シーエムシー出版　2008/04
固体酸化物形燃料電池（SOFC）の開発と展望

川田達也

シーエムシー出版　2005/10/31
反応場制御による新しい材料プロセッシング－協奏増幅を利用した材料創成－

Junichiro Mizusaki, Tatsuya Kawada, Keiji Yashiro

IPC　2004/04
Handbook of Fuel Cells, Fundamentals, Technologies and Applications, Volume 4

Tatsuya Kawada, Junichiro Mizusaki

John Wiley & Sons, Ltd.　2003/04
Solid State Electrochemistry- Introduction to Experimental Methods

T. Kawada

Published by Koudansya Scientific　2001/04
電気化学便覧第5版

川田達也

2000

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Presentations 168

Mechanical Properties of Electrolyte Materials at Elevated Temperatures International-presentation

Satoshi Watanabe, Tomohiro Kori, Kazuhisa Sato, Keiji Yashiro, Toshiyuki Hashida, Tatsuya Kawada

5th Asian SOFC Symposium　2018/08/07
Chemo-mechanical Properties of SOFC Materials and their Impact on Reliability International-presentation Invited

KAWADA Tatsuya

12th International Conference on Ceramics Materials for Energy and Environmental Applications (CMCEE2018)　2018/07/22
Chemo-Mechanical Stress and Its Impact on the Stability and Reliability of Solid Oxide Fuel Cells International-presentation Invited

KAWADA Tatsuya

233rd Meeting of the Electrochemical Society　2018/05/13
Electrode Engineering Based on Observation of Gas-Solid Interfaces International-presentation Invited

Tatsuya Kawada, Keiji Yashiro, Shin-ichi Hashimoto, Takashi Nakamura, Koji Amezawa, Katsuhiko Yamaji, Haruo Kishimoto, Katherine Develos-Bagarinao, Teruhisa Horita, Hiroki Muroyama, Toshiaki Matsui, Jun Kubota, Shogo Miyoshi

2016 Asian SOFC Symposium　2016/09/04
Investigation of Mechanical Propertiers of Materials for Siumulating SOFC Transient Behaviors International-presentation

T. Kawada, S. Watanabe, Y. Kimura, K. Sato, K. Yashiro, F. Iguchi, S. Hashimoto, T. Hashida, K. Terada, K. Amezawa, H. Yugami

MODVAL13 SYMPOSIUM FOR FUEL CELL AND BATTERY MODELING AND EXPERIMENTAL VALIDATION　2016/03/22
固体酸化物形燃料電池用電極の評価法の進歩と理解

第41回固体イオニクス討論会　2015/11/25
Effect of Chemomechanical Coupling on Defect Equilibrium and Transport in Solid State Ionic Devices International-presentation

Tatsuya Kawada, Yuta Kimura, Yuki Gonoi, Keiji Yashiro, Shin-ichi Hashimoto, Koji Amezawa

20th International Conference on Solid State Ionics　2015/06/14
Compositional and Mechanical Stabilities of (La,Sr)(Co,Fe)O3-δ Cathode under SOFC Operation International-presentation

M.-Y. Oh, H. Watanabe, Y. Kimura, Y. Fujimaki, T. Masumitsu, S. Watanabe, S. Hashimoto, K. Amezawa

221st The Electrochemical Society Meeting　2012/05/06
Surface Modification of (La,Sr)CoO3 for High Performance SOFC Cathode International-presentation

Toshiya Tairako, Kazuki Nagao, Mi-Young Oh, Atsushi Unemoto, Koji Amezawa

Materials Science & Technology 2010 Conference and Exhibition (MS&T2010)　2010/10/17
SOFCの信頼性・耐久性に関する基礎研究について

大阪科学技術センター燃料電池部会・FCH基盤技術懇談会『最新のSOFC開発状況』　2010/09/29
Oxygen transport in high temperature electrodes for solid oxide fuel cells International-presentation

Koji Amezawa, Atsushi Unemoto, Yoshiharu Uchimoto

4th International Conference on the Science and Technology for Advanced Ceramics (STAC-4)　2010/06/21
From Electrochemical to Mechanical Modeling of SOFC under Operation International-presentation

M. Kurumatani, K. Terada, S. Watanabe, S. Hashimoto, T. Sakamoto, A. Unemoto, K. Sato, F. Iguchi, K. Yashiro, K. Amezawa, M. Kubo, H. Yugami, T. Hashida, J. Mizusaki

7th Symposium on Fuel Cell Modelling and Experimental Validation (MODVAL7)　2010/03/23
Evaluation of degradation modes of a SOFC electrode by impedance spectroscopy International-presentation

Tatsuya Kawada, Hidetaka Watanabe, Kazuki Nagao, Atsushi Unemoto, Koji Amezawa

Materials Sciences & Technology 2009 Conference & Exhibition　2009/10/25
Investigation of High Temperature Elastic Modulus and Internal Friction of SOFC Electrolytes Using Resonance Method International-presentation

Takuto Kushi, Kazuhisa Sato, Atsushi Unemoto, Koji Amezawa, Tatsuya Kawada

11th International Symposium on Solid Oxide Fuel Cells　2009/10/04
Electrochemical Analysis on Degradsation in Ni-GDC Cermet Anode for SOFC International-presentation

Hidetaka Watanabe, Atsushi Unemoto, Koji Amezawa, Tatsuya Kawada

11th International Symposium on Solid Oxide Fuel Cells　2009/10/04
Investigation on Oxygen Potential Distribution in a ZrO2-Based Solid Electrolyte by Using In-Situ Micro XAS Technique International-presentation

K. Amezawa, T. Ina, Y. Orikasa, A. Unemoto, H. Watanabe, F. Iguchi, Y. Terada, T. Fukutsuka, T. Kawada, H. Yugami, Y. Uchimoto

11th International Symposium on Solid Oxide Fuel Cells　2009/10/04
Classification of Mechanical Failures in SOFC and Strategy for Evaluation of the Operational Margins International-presentation

T. Kawada, S. Watanabe, S. Hashimoto, T. Sakamoto, A. Unemoto, M. Kurumatani, K. Sato, F. Iguchi, K. Yashiro, K. Amezawa, K. Terada, M. Kubo, H. Yugami, T. Hashida, J. Mizusaki

11th International Symposium on Solid Oxide Fuel Cells　2009/10/04
Deformation and Fracture Characteristics of Zirconia and Ceria-Based Electrolytes for SOFCs under Reducing Atmospheres International-presentation

Toshiyuki Hashida, Kazuhisa Sato, Yohei Takeyama, Tatsuya Kawada, Junichiro Mizusaki

11th International Symposium on Solid Oxide Fuel Cells　2009/10/04
固体酸化物形燃料電池開発の研究開発動向と信頼性・耐久性向上への取り組み

川田達也

日本機械学会2009年度年次大会　2009/09/13
ナノインテ_ンテーション法によるSOFC電極／電解質界面の機械的特性評価

伊藤英彬, 佐藤一永, 宇根本篤, 雨澤浩史, 川田達也

日本機械学会2009年度年次大会　2009/09/13
SOFC構成セラミックスの機械的特性に及ほ_す酸素ホ_テンシャルの影響に関する研究

武山陽平, 佐藤一永, 川田達也, 橋田俊之, 水崎純一郎

日本機械学会2009年度年次大会　2009/09/13
共振法によるSOFC電解質材料の機械的特性評価

櫛拓人, 佐藤一永, 宇根本篤, 雨澤浩史, 川田達也

日本機械学会2009年度年次大会　2009/09/13
擬三元系酸化物LaFeO3-SrFeO3-SrZrO3におけるフ_ロトン導電特性評価

宇根本篤, 開米篤志, 佐藤一永, 八代圭司, 松本広重, 水崎純一郎, 雨澤浩史, 川田達也

2009年電気化学秋季大会　2009/09/10
Ni-GDCサーメット燃料極の微細構造と有効反応場，劣化モート_の関係

渡邉秀貴, 宇根本篤, 雨澤浩史, 川田達也

2009年電気化学秋季大会　2009/09/10
ランタン系ウルトラリン酸(La,Sr)P5O14におけるフ_ロトン導電特性評価

宇根本篤, 雨澤浩史, 川田達也

2009年電気化学秋季大会　2009/09/10
希土類混合オルトホウ酸塩におけるフ_ロトン・電子混合導電性の制御

高橋勇人, 宇根本篤, 雨澤浩史, 川田達也

2009年電気化学秋季大会　2009/09/10
Defect Chemical Approach to the Research on Integrity of Interfaces in SOFC International-presentation

T. Kawada, H. Watanabe, A. Unemoto, K. Sato, K. Amezawa, M. Kurumatani, K. Terada

The 6th Petite Workshop on Defect Chemical Nature of Energy Materials　2009/09/06
Control of Mixed Proton and Electron Hole Conductivity by Mixing Rare-Earth Ortho-Borates International-presentation

Hayato Takahashi, Atsushi Unemoto, Koji Amezawa, Tatsuya Kawada

17th International Conference on Solid State Ionics　2009/06/28
Nanoprotonics in platinum-containing perovskite-type oxides International-presentation

H. Matsumoto, Y. Furuya, T. Tanji, K. Amezawa, T. Kawada, Y. Uchimoto, R. Tokunaga, T. Sakai, T. Ishihara

17th International Conference on Solid State Ionics　2009/06/28
Depth-Resolved In-Situ XAFS Measurements of Nd2NiO4+d Epitaxial Thin Films International-presentation

K. Amezawa, Y. Orikasa, T. Ina, T. Fukutsuka, A. Yamada, T. Uruga, H. Tanida, M. Takagaki, H. Toyokawa, Y. Terada, T. Kawada, Y. Uchimoto

17th International Conference on Solid State Ionics　2009/06/28
Electrode Reaction Mechanism of LSCF and LSM Studied by In Situ Electrochemical XAS International-presentation

Y. Orikasa, T. Nakao, T. Fukutsuka, A. Mineshige, K. Amezawa, T. Kawada, Y. Uchimoto

17th International Conference on Solid State Ionics　2009/06/28
フ_ロトン伝導性ヘ_ロフ_スカイト中への白金ナノ粒子分散の効果

徳永隆司, 松本広重, 丹司敬義, 雨澤浩史, 川田達也, 内本喜晴, 酒井孝明, 石原達己

電気化学会第76回大会　2009/03/29
応力場における高温導電性酸化物の導電率・セ_ーヘ_ック係数と不定比性

辺見大輔, 岩本力俊, 平井信行, 佐瀬麻耶, 宇根本篤, 中村崇司, 堀切文正, 森義浩, 佐藤一永, 川田達也, 八代圭司, 水崎純一郎

電気化学会第76回大会　2009/03/29
Nd2NiO4+d配向性単結晶薄膜の深さ分解XAFS測定

雨澤浩史, 折笠有基, 伊奈稔哲, 福塚友和, 山田淳夫, 高垣昌史, 宇留賀朋哉, 谷田肇, 豊川秀訓, 寺田靖子, 川田達也, 内本喜晴

電気化学会第76回大会　2009/03/29
その場電気化学XASを用いたLSCF/YDCモテ_ル電極における電極反応律速過程の解明

折笠有基, 伊奈稔哲, 中尾孝之, 福塚友和, 嶺重温, 雨澤浩史, 川田達也, 内本喜晴

電気化学会第76回大会　2009/03/29
La-Sr-Co-O系緻密電極の組成と酸素表面交換速度

長尾憲樹, 宇根本篤, 雨澤浩史, Andrew T. DeMartini, Stuart, B. Adler, 川田達也

電気化学会第76回大会　2009/03/29
Niサーメット電極の有効反応場解明と初期劣化現象

渡邉秀貴, 宇根本篤, 雨澤浩史, 川田達也

電気化学会第76回大会　2009/03/29
高温電気化学テ_ハ_イス解析のためのin situ XAFS測定技術の開発

雨澤浩史, 折笠有基, 伊奈稔哲, 福塚友和, 川田達也, 内本喜晴

第26回PFシンホ_シ_ウム　2009/03/24
In-situ XAFS測定による固体酸化物形燃料電池の空気極反応機構の解明

伊奈哲稔, 折笠有基, 福塚友和, 雨澤浩史, 川田達也, 内本喜晴

第26回PFシンホ_シ_ウム　2009/03/24
SOFCの開発と信頼性・耐久性に関する研究の動向

川田達也

第51回固体イオニクス研究会　2009/03/19
Surface Modification of (La,Sr)CoO3 for High Performance SOFC Cathode International-presentation

Koji Amezawa, Tatsuya Kawada, Atsushi Unemoto, Maya Sase, Kazuki Nagao, Toshiya Tairako, Yuki Orikasa, Yoshiharu Uchimoto, Yasuko Terada

Engineering Conferences International: Nonstoichiometric Compounds　2009/03/08
格子間酸素を導電種とするLn2NiO4 (Ln=La, Nd)の点欠陥構造に与える因子

伊奈哲稔, 中尾孝之, 折笠有基, 福塚友和, 嶺重温, 雨澤浩史, 川田達也, 内本喜晴

固体化学の新しい指針を探る研究会：若手研究者による研究発表会　2009/03/06
Depth-Resolved In-Situ X-Ray Absorption Spectroscopy Measurements of Nd2NiO4+d Epitaxial Thin Films International-presentation

K. Amezawa, Y. Orikasa, T. Ina, T. Fukutsuka, A. Yamada, T. Uruga, H. Toyokawa, Y. Terada, T. Kawada, Y. Uchimoto

214th Electrochemical Society Meeting　2008/10/12
SOFC Cathodic Reaction on La0.6Sr0.4CoO3-d Studied by In-Situ Electrochemical XAS International-presentation

Y. Orikasa, T. Ina, T. Fukutsuka, Y. Uchimoto, K. Amezawa, T. Kawada

214th Electrochemical Society Meeting　2008/10/12
Nonlinear analysis of the oxygen surface reaction and thermodynamic behavior of La1-xSrxCoO3-delta International-presentation

Andrew T. DeMartini, Atsushi Unemoto, Tatsuya Kawada, Stuart B. Adler

214th Electrochemical Society Meeting　2008/10/12
Electrochemical and Electronic Properties of Oxide Hetero-Junction of (La,Sr)CoO3 and (La,Sr)2CoO4 International-presentation

T. Kawada, M. Sase, T. Tairako, K. Amezawa, Y. Orikasa, T. Ina, Y. Uchimoto, Y. Terada

214th Electrochemical Society Meeting　2008/10/12
Carbon Deposition and Electrochemical Reaction of Anode for SOFC in Methane Containing Atmosphere International-presentation

K. Yashiro, M. Takase, K. Sato, T. Kawada, J. Mizusaki

214th Electrochemical Society Meeting　2008/10/12
Electronic properties and oxygen nonstoichiometry of mixed-conducting oxide La1-xSrxCoO3-delta thin films at high temperature International-presentation

Daisuke Henmi, Katsutoshi Iwamoto, Nobuyuki Hirai, Maya Sase, Atsushi Unemoto, Takashi Nakamura, Fumimasa Horikiri, Yoshihiro Mori, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

214th Electrochemical Society Meeting　2008/10/12
Electronic and Local Structures of Ln2NiO4+d (Ln=La, Nd) Bulk and Thin Film International-presentation

T. Ina, Y. Orikasa, T. Fukutsuka, Y. Uchimoto, K. Amezawa, T. Kawada, A. Yamada

214th Electrochemical Society Meeting　2008/10/12
Relationship between the reaction area and chemical capacitance in Ni-GDC cermet anode for SOFC International-presentation

Hidetaka Watanabe, Takashi Nakamura, Atsushi Unemoto, Maya Sase, Koji Amezawa, Tatsuya Kawada

214th Electrochemical Society Meeting　2008/10/12
The Barrier Formation Mechanism on SrTiO3 for High-Temperature Photo-Electro Devices International-presentation

F. Horikiri, T. Ichikawa, K. Sato, K. Yashiro, T. Kawada, J. Mizusaki

214th Electrochemical Society Meeting　2008/10/12
The Design Concept for High-Temperature Photo-Electro Devices Using SrTiO3 International-presentation

F. Horikiri, K. Sato, K. Yashiro, T. Kawada, J. Mizusaki

214th Electrochemical Society Meeting　2008/10/12
Effect of surface modification on the properties of (La,Sr)CoO3 electrode International-presentation

Tatsuya Kawada, Maya Sase, Koji Amezawa, Hidetaka Watanabe, Atsushi Unemoto, Yoshiharu Uchimoto

Materials Science & Technology 2008 Conference and Exhibition　2008/10/05
Proton and mixed proton-electron conduction in acceptor-doped oxoacid salts International-presentation

Koji Amezawa, Naoto Kitamura, Atsushi Unemoto, Tatsuya Kawada

14th International Conference on Solid State Protonic Conductors　2008/09/07
Electronic and Local Structures of La1-xSrxCoO3-delta Studied by In-Situ Micro XAFS Measurements International-presentation

K. Amezawa, A. Unemoto, M. Sase, T. Kawada, Y. Orikasa, H. Aoki, T. Ina, T. Fukutsuka, Y. Uchimoto, Y. Terada

213th Electrochemical Society Meeting　2008/05/18
Proton-Electron Mixed Conduction Properties in (Ce,Sr)PO4 International-presentation

A. Unemoto, N. Kitamura, K. Amezawa, T. Kawada

213th Electrochemical Society Meeting　2008/05/18
X-Ray Absorption Spectroscopic Studies on Electrical and Local Structures in La0.6Sr0.4Co0.8Fe0.2O3-delta Perovskite-Type Oxides International-presentation

Yuki Orikasa, Toshiaki Ina, Hiroyoshi Aoki, Tomokazu Fukutsuka, Yoshiharu Uchimoto, Koji Amezawa, Tatsuya Kawada

213th Electrochemical Society Meeting　2008/05/18
Relationship between Defect Structures and Electrochemical Properties of (La,Sr)2NiO4 International-presentation

Toshiaki Ina, Hiroyoshi Aoki, Yuki Orikasa, Tomokazu Fukutsuka, Yoshiharu Uchimoto, Koji Amezawa, Tatsuya Kawada

213th Electrochemical Society Meeting　2008/05/18
SOFCの信頼性向上のための評価手法と材料設計

川田達也, 渡邊秀貴, 宇根本篤, 佐瀬摩耶, 雨澤浩史, 中村崇司, 佐藤一永, 八代圭司, 水崎純一郎, 橋田俊之, 湯上浩雄

第16回SOFC研究発表会　2007/12/20
(La,Sr)2NiO4の欠陥構造およひ_その電気化学酸素還元反応特性

伊奈稔哲, 青木潤珠, 折笠有基, 内本喜晴, 雨澤浩史, 川田達也

第16回SOFC研究発表会　2007/12/20
ランタン遷移金属酸化物カソート_材料のヘテロ界面における酸素表面交換反応

佐瀬摩耶, 宇根本篤, 雨澤浩史, 川田達也, Florian Helmes, 佐藤一永, 八代圭司, 水崎純一郎

第16回SOFC研究発表会　2007/12/20
ランタン遷移金属酸化物カソート_材料のin situマイクロXAFS測定

雨澤浩史, 宇根本篤, 佐瀬摩耶, 川田達也, 折笠有基, 内本喜晴, 寺田靖子

第16回SOFC研究発表会　2007/12/20
ヘ_ロフ_スカイト型酸化物(La,Sr)(Co,Fe)O3の電極反応機構の解明

折笠有基, 青木潤珠, 伊奈稔哲, 内本喜晴, 雨澤浩史, 川田達也

第16回SOFC研究発表会　2007/12/20
固体酸化物燃料電池の電極反応へのその場測定の適用

八代圭司, 平井信行, 高瀬光成, 中川洋一, 佐藤一永, 水崎純一郎, 川田達也

第16回SOFC研究発表会　2007/12/20
イットリア安定化シ_ルコニアハ_ルク材料におけるひす_みと導電率の関係

佐藤一永, 鳴海涼, 鈴木研, 八代圭司, 井口史匡, 川田達也, 湯上浩雄, 橋田俊之, 水崎純一郎

第16回SOFC研究発表会　2007/12/20
その場偏光変調赤外反射分光法の開発とその高温カ_ス電極反応機構解明への展開

平井信行, 佐藤一永, 八代圭司, 水崎純一郎, 川田達也

第16回SOFC研究発表会　2007/12/20
SOFCの機械的損傷のその場観察

佐藤一永, 八代圭司, 橋田俊之, 川田達也, 湯上浩雄, 水崎純一郎, 福井健一, 沼尾正行

第16回SOFC研究発表会　2007/12/20
Bサイト混合系ヘ_ロフ_スカイト型酸化物LaCrO3の欠陥構造解析

大石昌嗣, 八代圭司, 佐藤一永, 川田達也, 水崎純一郎

第16回SOFC研究発表会　2007/12/20
(La,Sr)CoO3/(La,Sr)2CoO4へテロ界面における酸素表面交換反応促進

佐瀬摩耶, F. Helmes, 雨澤浩史, 川田達也, 佐藤一永, 八代圭司, 水崎純一郎, 酒井夏子, 山地克彦, 堀田照久, 横川晴美

第33回固体イオニクス討論会　2007/12/06
XAFSを用いたSOFC正極材料(La,Sr)(Co,Fe)O3の電極反応機構の解明

折笠有基, 青木潤珠, 伊奈稔哲, 内本喜晴, 雨澤浩史, 川田達也

第33回固体イオニクス討論会　2007/12/06
La2-xSrxCoO4の電子・局所構造と電気化学特性

青木潤珠, 伊奈稔哲, 折笠有基, 内本喜晴, 雨澤浩史, 川田達也

第33回固体イオニクス討論会　2007/12/06
SOFC正極材料(La,Sr)2NiO4の欠陥構造と電極反応機構の関係

伊奈稔哲, 青木潤珠, 折笠有基, 内本喜晴, 雨澤浩史, 川田達也

第33回固体イオニクス討論会　2007/12/06
その場マイクロXAFS測定によるSOFCカソート_材料の電子・局所構造解析

雨澤浩史, 宇根本篤, 佐瀬摩耶, 川田達也, 折笠有基, 内本喜晴, 寺田靖子

第33回固体イオニクス討論会　2007/12/06
高温導電性酸化物YSZハ_ルク体におけるひす_みと導電率の関係

佐藤一永, 鳴海涼, 鈴木研, 八代圭司, 井口史匡, 川田達也, 湯上浩雄, 橋田俊之, 水崎純一郎

第33回固体イオニクス討論会　2007/12/06
ヘ_ロフ_スカイト型フ_ロトン導電性酸化物の緩和現象と欠陥平衡

阿子島聡志, 大石昌嗣, 工藤孝夫, 佐藤一永, 八代圭司, 川田達也, 水崎純一郎

第33回固体イオニクス討論会　2007/12/06
Ｂサイト混合系ヘ_ロフ_スカイト型酸化物LaCrO3の酸素不定比性と欠陥構造

大石昌嗣, 八代圭司, 佐藤一永, 川田達也, 水崎純一郎

第33回固体イオニクス討論会　2007/12/06
希土類コハ_ルト系ヘ_ロフ_スカイト酸化物の電極特性の解明

折笠有基, 青木潤珠, 伊奈稔哲, 内本喜晴, 雨澤浩史, 川田達也

第48回電池討論会　2007/10/13
アラコ_ナイト型希土類オルトホウ酸塩LnBO3（Ln=La, Ce, Pr, Nd）における電気伝導

雨澤浩史, 宇根本篤, 川田達也, 高橋信之, 山田淳一, 柳原明日輝, 北村尚斗, 内本喜晴

平成19年度希土類若手研究発表会　2007/10/11
セリウムリン酸塩のフ_ロトン−電子混合伝導特性

宇根本篤, 北村尚斗, 雨澤浩史, 川田達也

平成19年度希土類若手研究発表会　2007/10/11
The Numerical Estimation of the Conductivity of Donor-Doped Strontium Titanate International-presentation

F. Horikiri, E. Niwa, K. Sato, K. Yashiro, T. Kawada, J. Mizusaki

21st Century COE Program Fourth International Conference on Flow Dynamics　2007/09/26
Electrical Conductivity and Defect Concentration of BaCe0.9M0.1O3-δd (M=Y, Yb, Tb, and Nd) International-presentation

M. Oishi, S.Akoshima, K.Yashiro, K.Sato, T.Kawada, J.Mizusaki

21st Century COE Program Fourth International Conference on Flow Dynamics　2007/09/26
Enhancement of 18O Surface Exchange on the Hetero Phase Interface of(La,Sr)CoO3/(La,Sr)2CoO4 International-presentation

M. Sase, F. Helmes, K. Yashiro, K. Sato, J. Mizusaki, T. Kawada, N. Sakai, K. Yamaji, T. Horita, H. Yokokawa

21st Century COE Program Fourth International Conference on Flow Dynamics　2007/09/26
Experimental Determination of Oxygen Flow Pathway in the Microstructure of Solid Oxide Fuel Cell Electrodes International-presentation

Tatsuya Kawada, Atushi Unemoto, Koji Amezawa, Keiji Yashiro, Takashi Nakamura, Maya Sase, Masakazu Kudo, Atsushi Kaimai, Kazuhisa Sato, Junichiro Mizusaki, Teruhisa Horita, Natsuko Sakai, Katsuhiko Yamaji, Harumi Yokokawa

21st Century COE Program Fourth International Conference on Flow Dynamics　2007/09/26
Investigation on SOFC Cathodic Reaction by In Situ X-Ray Absorption Spectroscopy International-presentation

Koji Amezawa, Atsushi Unemoto, Tatsuya Kawada, Maya Sase, Atsushi Kaimai, Kazuhisa Sato, Keiji Yashiro, Junichiro Mizusaki, Muneaki Rai, Yuki Orikasa, Yoshiharu Uchimoto

21st Century COE Program Fourth International Conference on Flow Dynamics　2007/09/26
Mixed Proton-Electron-Conducting Membrane for Hydrogen Separation International-presentation

H. Matsumoto, T. Shimura, T. Higuchi, T. Otake, Y. Sasaki, K. Yashiro, T. Kawada, J. Mizusaki, T. Ishihara

21st Century COE Program Fourth International Conference on Flow Dynamics　2007/09/26
Reaction Zone in a Mixed Conducting Oxide Anode for Solid Oxide Fuel Cell International-presentation

T. Nakamura, K. Yashiro, K. Sato, T. Kawada, J. Mizusaki

21st Century COE Program Fourth International Conference on Flow Dynamics　2007/09/26
In situ Fracture Observation of Solid Oxide Fuel Cells Gas Seal International-presentation

K. Sato, S. Kyotani, K. Yashiro, T. Kawada, T. Hashida, J. Mizusaki

5th International Workshop on WATER DYNAMICS　2007/09/25
XAFSによるLa2-xSrxCoO4系酸化物の電子・局所構造解析

青木潤珠, 伊奈稔哲, 折笠有基, 内本喜晴, 雨澤浩史, 川田達也

2007年電気化学会秋季大会　2007/09/19
高温フ_ロトン導電体の緩和現象と欠陥平衡

阿子島聡志, 大石昌嗣, 工藤孝夫, 八代圭司, 佐藤一永, 川田達也, 水崎純一郎

2007年電気化学会秋季大会　2007/09/19
La2-xSrxNiO4+dの電子・局所構造解析およひ_電極特性の評価

伊奈稔哲, 青木潤珠, 折笠有基, 雨澤浩史, 内本喜晴, 川田達也

2007年電気化学会秋季大会　2007/09/19
SOFCカソート_材料のin situマイクロXAFS測定

雨澤浩史, 宇根本篤, 川田達也, 折笠有基, 内本喜晴, 寺田靖子

2007年電気化学会秋季大会　2007/09/19
電圧印加時におけるフ_ロトン伝導性酸化物SrZr0.9Y0.1O3-deltaて_の物質輸送とホ_テンシャル分布

宇根本篤, 工藤孝夫, 大竹隆徳, 佐藤一永, 八代圭司, 松本広重, 水崎純一郎, 雨澤浩史, 川田達也

2007年電気化学会秋季大会　2007/09/19
Oxygen Nonstoichiometry of B-site Doped LaCrO3 Perovskite-type Oxides International-presentation

M. Oishi, K. Sato, K. Yashiro, T. Kawada, J. Mizusaki

Materials Science & Technology 2007 Conference & Exhibition　2007/09/16
In situ Micro XAFS Measurements of SOFC Cathode Materials International-presentation

K. Amezawa, A. Unemoto, T. Kawada, Y. Orikasa, Y. Uchimoto

The 3rd Summer Seminar on Nanoionics　2007/09/06
In situ High Temperature X-Ray Absorption Spectroscopic Study on Oxygen Reduction at (La,Sr)CoO3/GDC Hetero Interface International-presentation

Y. Orikasa, H. Aoki, Y. Uchimoto, K. Amezawa, T. Kawada

The 3rd Summer Seminar on Nanoionics　2007/09/06
Enhancement of Oxygen Surface Exchange on the Hetero Phase Interface of (La,Sr)CoO3-delta International-presentation

M. Sase, F. Helmes, K. Yashiro, K. Sato, J. Mizusaki, A. Unemoto, K. Amezawa, T. Kawada, N. Sakai, K. Yamaji, T. Horita, H. Yokokawa

The 3rd Summer Seminar on Nanoionics　2007/09/06
Redistributions of Hydrogen and Oxygen Chemical Potentials across Sr(Zr,Y)O3 Electrolyte by Application of Direct Current International-presentation

Atsushi Unemoto, Koji Amezawa, Tatsuya Kawada, Hiroshige Matsumoto, Takao Kudo, Takanori Otake, Kazuhisa Sato, Keiji Yashiro, Junichiro Mizusaki

The 3rd Summer Seminar on Nanoionics　2007/09/06
Investigation of the ratio of negative ions and electrons in emission current from solid ionic conductors International-presentation

Takaaki Sakai, Masateru Nishioka, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

The 3rd Summer Seminar on Nanoionics　2007/09/06
Conductivity of YSZ under Uniaxial Pressure Conditions International-presentation

K. Sato, R. Narumi, K. Yashiro, T. Kawada, T. Hashida, J. Mizusaki

The 3rd Summer Seminar on Nanoionics　2007/09/06
Determination and Optimization of Reaction Sites of High Temperature Electrodes International-presentation

Tatsuya Kawada

International Conference on Electroceramcis　2007/07/31
DEFECT EQUILIBRIUM AND ELECTRON TRANSPORT IN THE BULK OF SINGLE CRYSTAL SrTi1-xNbxO3(x=0.01,0.001,0.0002) International-presentation

Fumimasa Horikiri, Naofumi Iizawa, LiQun Han, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

16th International Conference on Solid State Ionics　2007/07/01
DETERMINATION OF THE REACTION AREA IN GADOLINIA-DOPED CERIA ANODE FOR SOFC BY ELECTROCHEMICAL MEASUREMENTS International-presentation

Takashi Nakamura, Keiji Yashiro, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

16th International Conference on Solid State Ionics　2007/07/01
ELECTRIC TRANSPORTATION PROPERTIES OF POLY-CRYSTALLINE Sr2Nb2O7 MATERIALS International-presentation

Liqun Han, Fumimasa Horikiri, Naofumi Iizawa, Kazuhisa Sato, Keiji Yashiro, Yutaka Nigara, Tatsuya Kawada, Junichiro Mizusaki

16th International Conference on Solid State Ionics　2007/07/01
HYDROGEN PERMEABILITY AND ELECTRICAL PROPERTIES IN OXIDE COMPOSITES International-presentation

A. Unemoto, A. Kaimai, K. Sato, K. Yashiro, H. Matsumoto, J. Mizusaki, T. Kawada

16th International Conference on Solid State Ionics　2007/07/01
IN-SITU OBSERVATION OF Ni/ZIRCONIA ANODE FOR SOFC UNDER HYDROCARBON ATMOSPHERE International-presentation

M. Takase, K. Yashiro, K. Sato, T. Kawada, J. Mizusaki

16th International Conference on Solid State Ionics　2007/07/01
OXYGEN NONSTOICHIOMETRY AND DEFECT STRUCTURE OF THE PEROVSKITE-TYPE OXIDES BaCe0.9M0.1O3-δ(M=Y,Yb,Nd,Tb,and Sm International-presentation

Masatsugu Oishi, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

16th International Conference on Solid State Ionics　2007/07/01
SLOW RELAXATION KINETICS OF Sr(Zr,Y)O3 IN WET ATMOSPHERE International-presentation

Takao Kudo, Hiroshige Matsumoto, Keiji Yashiro, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

16th International Conference on Solid State Ionics　2007/07/01
ELECTRIC AND LOCAL STRUCTURE OF La1-xSrxCoO3 STUDIED BY X-RAY ABSORPTION SPECTROSCOPY International-presentation

Yuki Orikasa, Muneaki Rai, Koji Amezawa, Yoshiharu Uchimoto, Tatsuya Kawada

16th International Conference on Solid State Ionics　2007/07/01
ELECTRONIC AND LOCAL STRUCTURE ANALYSIS OF LANTHANUM NICKELATE HAVING K2NiF4 STRUCTURE AND THEIR ELECTROCHIMICAL PROPERTIES International-presentation

Toshiaki Ina, Muneaki Rai, Koji Amezawa, Yoshiharu Uchimoto, Tatsuya Kawada

16th International Conference on Solid State Ionics　2007/07/01
Electrical Properties of Nb-Doped SrTiO3 Ceramics with Excess TiO2 for Anodes and Interconnects of SOFCs International-presentation

Fumimasa Horikiri, Li Qun Han, Naofumi Iizawa, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

10th International Symposium on Solid Oxide Fuel Cells　2007/06/03
Electrochemical Behaviors of Mixed Conducting Oxide Anode for SOFC International-presentation

Takashi Nakamura, Tsuneyuki Kobayasi, Keiji Yashiro, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

10th International Symposium on Solid Oxide Fuel Cells　2007/06/03
Electrode Performance at Hetero-interface of Perovskite-related Oxides, (La,Sr)CoO3-delta&delta/(La,Sr)2CoO4-delta International-presentation

K. Yashiro, T. Nakamura, M. Sase, F. Hermes, K. Sato, T. Kawada, J. Mizusaki

10th International Symposium on Solid Oxide Fuel Cells　2007/06/03
Microstructural Changes of Ni/YSZ Cermet under Repeated Redox Reaction in Environmental Scanning Electron Microscope(ESEM) International-presentation

Y. Nakagawa, K.Yashiro, K.Sato, T.Kawada, J.Mizusaki

10th International Symposium on Solid Oxide Fuel Cells　2007/06/03
Promotion of Oxygen Surface Reaction at the Hetero-Interface of (La,Sr)CoO3/(La,Sr)2CoO4 International-presentation

M. Sase, F. Hermes, T. Nakamura, K. Yashiro, K. Sato, J. Mizusaki, T. Kawada, N. Sakai, K. Yamaji, T. Horita, H. Yokokawa

10th International Symposium on Solid Oxide Fuel Cells　2007/06/03
Reliability Evaluation of SOFC under Simulated Operating Condition International-presentation

K. Sato, N. Imanaka, K. Fukui, M. Numao, S. Kyotani, K. Yashiro, T. Kawada, T. Hashida, J. Mizusaki

10th International Symposium on Solid Oxide Fuel Cells　2007/06/03
Surface Reaction and Transport Kinetics of Hydrogen through Palladium-based Membranes under Co-existing Gas with Hydrogen Atmospheres International-presentation

A. Unemoto, N. Hirai, A. Kaimai, K. Sazto, T. Otake, K. Yashiro, J. Mizusaki, T. Kawada, T. Tsuneki, Y. Shirasaki, Y. Ota, I. Yasuda

5th International Conference on Hydrogen Economy and Hydrogen Treatment of Materials (HTM-2007)　2007/05/21
固体酸化物燃料電池の実用化に向けた最近の取組み

川田達也

電気化学会第74回大会　2007/03/29
(1-y)(SrZrO3)-y(SrFeO3-delta)系複合酸化物の水素透過能及ひ_導電特性

宇根本篤, 開米篤志, 佐藤一永, 八代圭司, 松本広重, 水崎純一郎, 川田達也

電気化学会第74回大会　2007/03/29
ESEM を用いたSOFCアノート_の高温酸化還元サイクルに伴う微細構造変化のその場観察

中川洋一, 八代圭司, 佐藤一永, 川田達也, 水崎純一郎

電気化学会第74回大会　2007/03/29
SOFC用酸化物燃料電極の物性と電気化学的特長

中村崇司, 小林庸幸, 八代圭司, 佐藤一永, 川田達也, 水崎純一郎

電気化学会第74回大会　2007/03/29
ヘ_ロフ_スカイト型酸化物La0.75Sr0.25Cr0.5Mn0.5O3-deltaの酸素不定比性と欠陥構造

大石昌嗣, 佐藤一永, 八代圭司, 川田達也, 水崎純一郎

電気化学会第74回大会　2007/03/29
La2NiO4の電子・局所構造解析およひ_電極特性の評価

伊奈稔哲, 耒順秋, 雨澤浩史, 内本喜晴, 川田達也

電気化学会第74回大会　2007/03/29
固体イオン導電体を用いた負イオン源の熱イオン放出特性とそのメカニス_ム

酒井孝明, 藤原幸雄, 佐藤一永, 八代圭司, 川田達也, 水崎純一郎

第54回応用物理学関係連合講演会　2007/03/27
Design of high temperature interfaces in solid oxide fuel cells International-presentation

Tatsuya Kawada

The 4th International Symposium on Mechanical Science Based on Nanotechnology　2007/02/22
カソート_過電圧／反応経路の解明と新材料開発への展開

川田達也, 佐瀬麻耶, 宇根本篤, 開米篤志, F.Hermes, 佐藤一永, 八代圭司, 水崎純一郎, 雨澤浩史, 耒順秋, 北村尚斗, 内本喜晴, 寺田靖子, 酒井夏子, 山地克彦, 堀田照久, 横川晴美

第15回SOFC研究発表会　2006/12/05
環境制御型走査型電子顕微鏡（ESEM）を用いたSOFCアノート_材料の微細構造変化のリアルタイム観察

中川洋一, 八代圭司, 佐藤一永, 川田達也, 水崎純一郎

第15回SOFC研究発表会　2006/12/05
酸化物・コンホ_シ_ット電極の反応場とPEN三層膜の機械損傷に関するその場計測と解析法の展開

水崎純一郎, 八代圭司, 佐藤一永, 川田達也, 橋田俊之

第15回SOFC研究発表会　2006/12/05
酸化物アノート_Ce0.9Gd0.1O1.95における電極反応解析による電極反応場同定

中村崇司, 八代圭司, 佐藤一永, 開米篤志, 大竹隆憲, 朴吉在, 川田達也, 水崎純一郎

第15回SOFC研究発表会　2006/12/05
自己組織化マッヒ_ンク_手法を用いたSOFCの損傷可視化に関する研究

佐藤一永, 今中規景, 福井健一, 八代圭司, 沼尾正行, 川田達也, 湯上浩雄, 橋田俊之, 水崎純一郎

第15回SOFC研究発表会　2006/12/05
SOFCアノート_界面に於ける炭素析出・燃焼過程の直接観察

高瀬光成, 田浦知明, 八代圭司, 佐藤一永, 川田達也, 水崎純一郎

第15回SOFC研究発表会　2006/12/05
その場偏光変調赤外反射分光計測法による高温カ_ス電極反応場の解明

平井信行, 佐藤一永, 八代圭司, 川田達也, 水崎純一郎

第15回SOFC研究発表会　2006/12/05
X線吸収分光法によるSOFCカソート_用ヘ_ロフ_スカイト型酸化物の電子・局所構造解析

耒順秋, 北村尚斗, 雨澤浩史, 内本喜晴, 冨井洋一, 川田達也, 水崎純一郎, 酒井夏子

第32回固体イオニクス討論会　2006/11/27
その場X線吸収分光法によるSOFC酸素還元反応の解析

雨澤浩史, 耒順秋, 北村尚斗, 内本喜晴, 冨井洋一, 佐瀬麻耶, 開米篤志, 佐藤一永, 川田達也

第32回固体イオニクス討論会　2006/11/27
固体イオン導電体からの負イオン放出の印加電圧依存性

酒井孝明, 藤原達雄, 八代圭司, 佐藤一永, 川田達也, 水崎純一郎

第32回固体イオニクス討論会　2006/11/27
高温電気化学in situ XAFS測定によるSOFC酸化物カソート_の反応機構解析

雨澤浩史, 耒順秋, 北村尚斗, 内本喜晴, 冨井洋一, 佐瀬摩耶, 開米篤志, 佐藤一永, 川田達也

第47回電池討論会　2006/11/20
Effect of Mechanical Load on the Ionic Conductivity of YSZ International-presentation

K. Sato, R. Narumi, K. Yashiro, T. Kawada, H. Yugami, T. Hashida, J. Mizusaki

The 5th Petite Workshop on Defect Chemical Nature of Advanced Materials　2006/11/17
Promotion of Gas-Solid Oxygen Exchange Reaction at a Hetero-junction of La-Sr-Co-oxides International-presentation

T. Kawada, M. Sase, F. Hermes, A. Kaimai, A. Unemoto, K. Sato, K. Yashiro, J. Mizusaki, N. Sakai, T. Horita, K. Yamaji, H. Yokokawa, M. Rai, K. Kitamura, K. Amezawa, Y. Uchimoto, Y. Terada

The 5th Petite Workshop on Defect Chemical Nature of Advanced Materials　2006/11/17
Effect of Mechanical Load on the Electrical Property of Yttria-Stabilized Zirconia International-presentation

K. Sato, R. Narumi, K. Yashiro, T. Kawada, H. Yugami, T. Hashida, J. Mizusaki

The 16th Iketani Conference (Masuko Symposium)　2006/11/12
Evaluation of Surface Reaction of Hydrogen on a Palladium-Silver Membrane Under Co-Existence of H2O, CO, CO2 or CH4 International-presentation

A. Unemoto, N. Hirai, A. Kaimai, K. Sato, T. Otake, K. Yashiro, J.Mizusaki, T. Kawada, T. Tsuneki, Y. Shirasaki

The 16th Iketani Conference (Masuko Symposium)　2006/11/12
Experimental Approach to the Dynamic Behaviors of High Temperature Electrodes International-presentation

T. Kawada, M. Sase, H. Hosoi, K. Yashiro, K. Sato, J. Mizusaki, N. Sakai, T. Horita, K. Yamaji, H. Yokokawa, M. Rai, K. Kitamura, K. Amezawa, Y. Uchimoto

The 16th Iketani Conference (Masuko Symposium)　2006/11/12
A New Method for Evaluating Degradation of Solid Oxide Fuel Cell under Operating Conditions by Combining the Electrochemical Measuement with Non-Destructive Test International-presentation

Kazuhisa Sato, Shintaro Kyotani, Toshiyuki Hashida, Hirokazu Moriya, Tatsuya Kawada, Keiji Yashiro, Takashi Nakamura, Hiroo Yugami, Junichiro Mizusaki

Asian Symposium on Materials and Processing 2006　2006/11/08
The Oxygen Nonstoichiometry of doped BaCeO3 perovskite-type Oxides International-presentation

M. Oishi, K. Sato, K. Yashiro, T. Kawada, J. Mizusaki

Third International Conference on Flow Dynamics　2006/11/07
The Performance of SrTiO3 Schottky Cell at High-Temperatures and it''s Relationship to Substrate Orientation International-presentation

F. Horikiri, K. Sato, K. Yashiro, T. Kawada, J. Mizusaki

Third International Conference on Flow Dynamics　2006/11/07
Electronic and Local Structures of La1-xSrxCoO3 Studied by X-Ray Absorption Spectroscopy International-presentation

M. Rai, K. Amezawa, Y. Uchimoto, Y. Tomii, T. Kawada, J. Mizusaki

210th Electrochemical Society Meeting　2006/10/29
X-Ray Absorption Spectroscopic Studies on Electronic and Local Structures of La1-xSrxMnO3 International-presentation

H. Aoki, M. Rai, N. Kitamura, K. Amezawa, Y. Uchimoto, Y. Tomii, T. Kawada, J. Mizusaki

210th Electrochemical Society Meeting　2006/10/29
Mass Transport and Carrier Distribution in Sr(Zr,Y)O3 under Current Flow International-presentation

Tatsuya Kawada, Takao Kudo, Hiroshige Matsumoto, Takanori Otake, Keiji Yashiro, Junichiro Mizusaki

Materials Science and Technology 2006 Conference and Exhibition　2006/10/15
Co系ヘ_ロフ_スカイト関連化合物へテロ界面における電極反応

八代圭司, 中村崇司, F.Hermes, 佐瀬摩耶, 佐藤一永, 川田達也, 水崎純一郎

電気化学会秋季大会　2006/09/14
XAFSによるランタンコハ_ルタイト系ヘ_ロフ_スカイト型酸化物の電子・局所構造解析

耒順秋, 北村尚斗, 雨澤浩史, 内本喜晴, 冨井洋一, 川田達也, 水崎純一郎, 酒井夏子

電気化学会秋季大会　2006/09/14
XAFSによるランタンマンカ_ナイト系ヘ_ロフ_スカイト型酸化物の電子・局所構造解析

青木潤珠, 耒順秋, 北村尚斗, 雨澤浩史, 内本喜晴, 冨井洋一, 川田達也, 水崎純一郎, 酒井夏子

電気化学会秋季大会　2006/09/14
イットリア安定化シ_ルコニアの電気特性に及ほ_す力学的負荷の影響に関する研究

鳴海涼, 佐藤一永, 橋田俊之, 川田達也, 八代圭司, 湯上浩雄, 水崎純一郎

電気化学会秋季大会　2006/09/14
セリア系酸化物燃料電極の性能評価と電極反応場同定

中村崇司, 八代圭司, 開米篤志, 大竹隆憲, 佐藤一永, 朴吉在, 川田達也, 水崎純一郎

電気化学会秋季大会　2006/09/14
高温電気化学 in situ XAFS測定装置の開発(1) - 高温電極の過電圧とXAFS測定

川田達也, 開米篤志, 雨澤浩史, 内本喜晴, 寺田靖子

電気化学会秋季大会　2006/09/14
高温電気化学 in situ XAFS測定装置の開発(2) - SOFC酸化物カソート_の反応機構解析への応用

耒順秋, 北村尚斗, 雨澤浩史, 内本喜晴, 冨井洋一, 佐瀬摩耶, 開米篤志, 佐藤一永, 川田達也

電気化学会秋季大会　2006/09/14
Investigation of cathodic reaction in SOFC by in situ XAFS measurements International-presentation

Muneaki Rai, Naoto Kitamura, Koji Amezawa, Yoshiharu Uchimoto, Yoichi Tomii, Maya Sase, Atsushi Kaimai, Kazuhisa Sato, Tatsuya Kawada

The 2nd Summer Seminar on Nanoionics　2006/09/11
Characteristics of Damage and Fracture Process of Solid Oxide Fuel Cells under Simulated Operating Conditions by using AE Method International-presentation

K. Sato, T. Hashida, H. Yugami, K. Yashiro, T. Kawada, J. Mizusaki

The 18th International Acoustic Emission Symposium　2006/07/25
Chemical Capacitance of Oxide Anodes for Solid Oxide Fuel Cells International-presentation

T. Nakamura, K. Yashiro, K. Sato, T. Kawada, J. Mizusaki

Faraday Discussion 134 Atomic Transport and Defect Phenomena in Solids　2006/07/10
Defect structure of A site- and B site-doped lanthanum chromites International-presentation

Keiji Yashiro, Mamoru Hasegawa, Masatsugu Oishi, Kazuhisa Sato, Atsushi Kaimai, Takanori Otake, Tatsuya Kawada, Junichiro Mizusaki

Faraday Discussion 134 Atomic Transport and Defect Phenomena in Solids　2006/07/10
Electrical Conductivity and Defect Structure of Perovskite Oxide La0.9Ca0.1(Cr,Al)O3 International-presentation

K. Yashiro, M. Hasegawa, E. Niwa, K. Sato, A. Kaimai, T. Otake, T. Kawada, J. Mizusaki

7th European SOFC Forum (FUEL CELL FROUM 2006)　2006/07/03
Electrode Performance and Reaction Sites of Mixed Conducting Oxide Anode International-presentation

T. Nakamura, K. Yashiro, A. Kaimai, T. Otake, K. Sato, G. J. Park, T. Kawada, J. Mizusaki

7th European SOFC Forum (FUEL CELL FROUM 2006)　2006/07/03
Fast 18O Incorporation Paths along the Hetero Phase Boundary with (La,Sr)CoO3/(La,Sr)2CoO4 International-presentation

M. Sase, F. Hermes, K. Yashiro, T. Otake, A. Kaimai, T. Kawada, J. Mizusaki, N. Sakai, K. Yamaji, T. Horita, H. Yokokawa

7th European SOFC Forum (FUEL CELL FROUM 2006)　2006/07/03
Hydrogen Permeability of Palladium Alloy Membrane at High Temperature in the Impurity Gas Co-existing Atmospheres International-presentation

A. Unemoto, A. Kaimai, T. Otake, K. Yashiro, T. Kawada, J. Mizusaki

16th World Hydrogen Energy Conference　2006/06/13
Characterization of Oxide Anode Materials for SOFC International-presentation

T. Kawada, T. Nakamura, K. Yashiro, G.-J. Park, K. Sato, T. Otake, A. Kaimai, J. Mizusaki

CIMTEC2006　2006/06/05
Microscopic observation of oxygen reaction pathway on high temperature electrode materials International-presentation

Tatsuya Kawada, nbsp, Maya Sase, Masakazu Kudo, Keiji Yashiro, Kazuhisa Sato, Junichiro Mizusaki, Natsuko Sakai, Teruhisa Horita, Katsuhiko Yamaji, Harumi Yokokawa

European Material Research Society　2006/05/29
Active parts for CH4 decomposition and electrochemical oxidation at metal/oxide interfaces by isotope labeling-secondary ion mass spectrometry International-presentation

Teruhisa Horita, Haruo Kishimoto, Katsuhiko Yamaji, Natsuko Sakai, Yueping Xiong, Manuel Brito, Harumi Yokokawa, Muneaki Rai, Koji Amezawa, Yoshiharu Uchimoto

European Material Research Society　2006/05/29
ハ_ラシ_ウム系水素透過膜の表面反応へ及ほ_す不純物カ_スの影響

宇根本篤, 開米篤志, 大竹隆憲, 八代圭司, 川田達也, 水崎純一郎

電気化学会第73回大会　2006/04/01
フ_ロトン導電性酸化物／金属界面における導電特性

松本広重, 古谷佳久, 石原達己, 井坂真也, 大竹隆憲, 八代圭司, 川田達也, 水崎純一郎, 丹司敬義

電気化学会第73回大会　2006/04/01
Electrochemical Characterization and Dsign of Reaction Sites in Oxide Anodes International-presentation

T. Nakamura, K. Yashiro, K. Sato, T. Otake, A. Kaimai, T. Kawada, J. Mizusaki

The 30th International Conference & Exposition on Advanced Ceramics & Composites　2006/01/22
Nb-doped SrTiO3-based high-temperature devices

F. Horikiri, A. Kaimai, T. Otake, K, Yashiro,T. Kawada, J. Mizusaki

第44回セラミックス基礎科学討論会　2006/01/19

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Industrial Property Rights 1

固体イオン導電体を用いた負イオンビイーム生成方法及びその方法を利用した負イオンビーム生成装置

川田達也, 水崎純一郎, 二唐裕, 藤原幸雄

特許第4253813号

Property Type: Patent

Research Projects 20

メンブレンリフォーマによる水素製造 Competitive

2005/04 - Present
固体酸化物燃料電池材料の研究 Competitive

1986/04 - Present
Integrated Fuel Cell System Aboard Spacecraft And Applications

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Japan Aerospace EXploration Agency

2018/04/01 - 2023/03/31
Development of equivalent circuit analysis method for multi-carrier-conductor/electrode systems

Kawada Tatsuya

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2019/04/01 - 2022/03/31

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Transport properties of proton-conducting oxides, which are expected as electrolytes for high efficiency fuel cells, are affected by the mobile holes and oxide ions. An equivalent circuit model was proposed to enable simple evaluation of their behaviors using a general-purpose circuit simulator. A surrogate model with the gas-solid exchange resistances of hydrogen, water vapor, and oxygen as parameters was developed for a fast search for combinations of electrode resistances that reproduce the experimental results. Transport constants which are necessary for the calculation were measured, and the calculated results were experimentally verified.
Electrode reaction mechanism analysis using hetero junction boundary length control between ionic conductors.

Shin-ichi Hashimoto, AMEZAWA KOJI, IGUCHI FUMITADA, NAKAMURA TAKASHI, KAWADA Tatsuya

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2013/04/01 - 2016/03/31

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Recently, composite SOFC (solid state fuel cells) cathodes between the mixed conducting oxides and electrolyte materials are widely examined due to the expectation of reaction site enhancement on triple phase boundary, However, evaluation of quantitative reactivity at triple phase boundary and the detail analysis of reaction process were not enough examined for the mix conducting cathodes. In this study, pattern electrode formation technologies is established to give a quantitative evaluation of activity at triple phase boundary by controlling of the triple phase boundary length and electrode area. As the results, it was found out that interfacial conductivity of La0.6Sr0.4CoO3-d(LSC) cathode on a CeO2 based oxide ionic conductor depended on the area specific triple phase boundary length below 873K. Additionally, it was also discovered that cathodic reaction sites of LSC cathode on a proton conducting electrolyte were mainly triple phase boundaries.
Effect of mechanical stress on defect equilibrium of nonstoichiometric oxides

KAWADA Tatsuya

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Tohoku University

2012/04/01 - 2014/03/31

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This research aimed at experimental quantification of the effect of mechanical stress on the defect equilibrium of oxide materials, (La,Sr)CoO3, (La,Sr)(Co,Fe)O3, (La,Sr)FeO3, La2NiO4, nd LaMnO3 were selected as the model materials. A YSZ ball was indented onto the sample surfaces and the potential between the electrodes placed on YSZ and on the sample were measured as a function of time. With the materials with oxygen deficient nonstoichiometry, the potential showed sudden decrease upon loading, and increased upon its release. During the load was kept constant, the potential decayed to the original value with a time constant equivalent to that of oxygen vacancy diffusion. The effect of the stress on the chemical potential was quantified from the emf shift. It was consistent with the thermodynamic calculation based on the chemical expansion coefficient of the corresponding materials.
In situ evaluation of potential distribution in high temperature electrochemical devices

AMEZAWA Koji, KAWADA Tatsuya, IGUCHI Fumitada, HASHIMOTO Shin-ichi, YASHIRO Keiji, UNEMOTO Atsushi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2010 - 2012

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The chemical potential distribution of the reactive atomic species in high temperature electrochemical devices, such as the oxygen chemical potential in solid oxide fuel cells (SOFCs), was experimentally evaluated under device operating conditions. As results, we succeeded for the first time to clarify the oxygen potential distribution and the effective reaction area in the SOFC mixed-conducting porous cathode. Influences of such a chemical potential distribution on the device performance and durability were also investigated from the thermodynamic and kinetic points of view, taking the SOFC porous cathode as a model case.
Design Methodology of Thin Electrytes for the Development of Intermediate Temperature SOFCs

HASHIDA Toshiyuki, MIZUSAKI Junichro, YUGAMI Hiroo, KAWADA Tatsuya, SATO Kazuhisa

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2006 - 2008
Dynamic Measurement of High Temperature Solid Surface for Investigation of nano-NEMCA Effects

KAWADA Tatsuya

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research on Priority Areas

Institution: Tohoku University

2004 - 2008
高温ナノイオニクスの新展開

山口周, 尾山由紀子, 水崎純一郎, 河村純一, 湯上浩雄, 川田達也

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(C)

Institution: 東京大学

2004 - 2004

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本研究は,ナノイオニクス現象を利用し,バルク体では達成できないはるかに高い性能を有するナノイオニクス固体ならびにナノイオニクス素子を開発するために必要となる学理の探求とこれを利用した新規な固体電気化学デバイスの開発を展開することを目的として,当該分野の研究をいくつかの研究グループからなる組織により急速に括組織的に研究を展開させるための特定領域研究の策定を目的としたものである.そのために,下記の4研究項目について特定領域研究として提案するための研究計画・組織,具体的な諸項目について検討を行った.(○はグループリーダ) 1.ナノイオニクス基礎特性の解明と設計(○丸山,下条,丹司) 2.ナノイオニクス高速イオン移動固体の設計と創製(○湯上,河村,森) 3.ナノイオニクスヘテロジャンクションを利用した新規電極設計とその創製(○山口,川田,日比野,内本,尾山) 4.ナノイオニクス固体素子を利用した新規デバイスの開発(○水崎,三浦,寺部) 具体的な検討項目は,(1)各担当項目に関する現象論とその学理に関する現状,(2)当該トピックスに関する国内外における研究動向を調査し,研究トピックスの現状,研究動向,ならびに将来の展望をまとめた.また2回(東京)の研究連絡会を開催し,研究分担者ごとの調査方針を確認するとともに,各研究領域における問題設定の妥当性,今後考慮すべきトピックスをまとめた.
Defect Equilibrium of Perovskite-type and Related Oxides in a Thin Film or a Micro Device

MIZUSAKI Junichiro, YASHIRO Keiji, KAWADA Tatsuya, MATSUMOTO Hiroshige

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Tohoku University

2001 - 2004

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1.Oxygen nonstoichiometry in a (La, Sr)CoO3 film on a (Ce, Gd)O2 substrate was investigated. Instead of using a thermogravimetry, a new electrochemical technique was developed. The electrochemical impedance was measured for the thin film using the (Ce, Gd)O2 substrate as an electrolyte. Since the rate determining step was surface reaction, the high frequency ac current measured the quantity of oxygen which is transported between the film and the electrolyte. The frequency response of the impedance gave the oxygen nonstoichiometry change. Several (La, Sr)CoO3 films of various Sr content were evaluated.. Enthalpy of oxygen vacancy formation was found to be larger for the films than for the bulk. This implies that the film shows smaller oxygen vacancy concentration than expected from the reported data for the bulk. Effect of grain size and the type of substrate on the vacancy formation enthalpy was investigated to find no clear evidence. 2.Several separate topics were investigated on the relation between microstructure and nonstoichiometry of perovskites. (1)The reason of oxygen excess nonstoichiometry of LaMnO3 was confirmed to be the formation of cation vacancy. A sever change of microstructure was observed on the surface of LaMnO3 due to the formation and annihilation of cation vacancies. (2)A slow cation diffusion in an n-type SrTiO3 was found to limit the cation equilibration to a thin layer around the surface. Several unique functions, such as high temperature rectification function, were found to originate from the existence of the surface layer. (3)Microscopic fluctuation of composition in (La, Ca)(Cr, Al)O3 solid solution was found to affect its macroscopic oxygen nonstoichiometry. Quantitative representation of the oxygen nonstoichiometry was developed including the local composition fluctuation.
The basic research and development of micro solid oxide fuel cells

Offer Organization: NEDO

2000/11 - 2003/03
Ion Dynamics at Interfaces on Nano-structured Ion Conducting Artificial Lattices

YUGAMI Hiroo, KAWADA Tatsuya, SETA Noriko, TSUREKAWA Sadahiro, YAMAGUCHI Sadae

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2000 - 2002

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High temperature energy conversion systems for example solid oxide fuel cells (SOFC) etc have great potentials for high efficiency energy systems. However, there are several points of problems for practical application in wide application fields. In this study, the interface properties of solid state electrolyte materials is controlled by fabricating the artificial superlattice structures. Furthermore, the interface of ceramics of electrical conducting materials is also investigated by Kelvin probe force microscopy, in order to clear the relationship between the grain boundary natures and electrical conductivity. The following results are obtained; (1) Nano-structured perovskite-type proton conducting thin films have been fabricated by SF_6 fast atom beam etching, with an ordered anodic porous alumina membrane as a lithographic mask. 100 and 500 nm period hexagonal structures are patterned on laser ablation deposited SrCeO_3 film on MgO (110) substrate. It is found from x-ray diffraction analysis that the lattice constant a, which is perpendicular to the substrate surface, decreases with decreasing periodicity of the nano-structure. The optical transmission and reflection spectra show typical features of surface-relief grating structures. (2) Surface potential of individual grain boundaries of Nb-doped SrTiO_3 which has been considered a candidate of anode material of SOFC are evaluated by Kelvin probe force microscopy, without contacting to sample. Systematically investigation of the relationship between surface potential and grain boundary character, it is found that the surface potential at random boundary is quite different from other gain boundary types.
mICROANALYSIS OF dEPOSITION AND ELECTROCHEMICAL oXIDATION OF cARBON ON AN eLECTROCHEMICAL SYSTEM UNDER hYDROCARBON gASES

KAWADA Tatsuya, YASHIRO Keiji, NIGARA Yutaka, YUGAMI Hiroo, MIZUSAKI Junichiro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: TOHOKU UNIVERSITY

2000 - 2001

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In-situ Raman microscope analysis was performed to investigate carbon deposition and its electrochemical oxidation on a fuel electrode of a solid oxide fuel cell, and the following results were obtained. 1. We have developed a sample heating stage that was specially designed for high temperature electrochemical testing under optical microscope and Raman microscope. Two separate chambers were installed into the stage, which enabled a sample electrolyte pellet to be placed under fuel gas and air. By using the heating stage, it was possible to investigate observe carbon deposition processes at electrode/electrolyte system under a thermodynamically controlled atmospheres. 2. Electrochemical oxidation process of methane was investigated by combined electrochemical measurements and gas analysis. It was found that oxidation of methane proceeds not directly but via local steam reforming processes on the electrode. 3. Platinum and nickel model electrodes were fabricated on yttria stabilized zirconia electrolyte pellets. Microscopic observation of the carbon deposition, as well as the characterization of the deposited carbon were performed under methane and liquid petroleum gasses (LPG, n-butane). In the case of platinum electrode under LPG, two Raman bands called 'D-band' and 'G-band' were observed indicating the deposition of disordered carbon and graphite, respectively. The deposition of carbon can be observed also by optical microscope as color change of electrode surface. Optical microscope observation revealed that the carbon is deposited not uniformly on the electrode but expands gradually from the position where the first carbon is deposited. On the other hand, on a nickel electrode under methane fuel, only graphite was found by Raman spectroscopy. The deposited graphite was hard to be removed by electrochemical pumping of oxygen through the electrolyte.
化学ポテンシャル勾配下におけるセラミックス複酸化物の腐食分解

水崎純一郎, 河村憲一, 二唐裕, 川田達也, 八代圭司

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 萌芽的研究

Institution: 東北大学

1999 - 2001

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ペロブスカイト型ABO_3,スピネル型AB_2O_4等の複酸化物が元の酸化物AO_2,BO等から生成する生成自由エネルギーは金属の酸化等に比べて極めて小さい.従って,複酸化物を挟んで化学ポテンシャル差が与えられると,熱力学的にはこの複酸化物は容易に元の単純酸化物に分離する筈である.この分離はイオン移動を伴うため,この現象がどの程度起こるかはイオンの拡散がどの程度起こるかによって決まると考えられる.本研究では固体酸化物燃料電池材料であるペロブスカイト型酸化物LaMnO_3,YCrO_3などをモデル物質として取り上げ,この腐食分解現象を実証し,理論との関連を示すことを目指した. 昨年度までに理論計算により,広い範囲で固溶体形成する系では1000℃以上でも腐食分解が起こるまでの時間は観測可能範囲の時間を超えること,ペロブスカイト型酸化物の様に二種の金属イオンが異なる結晶学的位置を占める系では,SIMSで観測できる程度の腐食分解の兆候は数百時間で起こり得ることなどが示され,LaMnO_3についての直流印可の下での実験でその実証が行われた. 本年度は酸素ポテンシャル勾配下での実験をLaMnO_3,La_<0.7>Sr_<0.3>MnO_3について進めた.前者はLa/Mn比に0.9-1.0にわたる不定比組成幅があり,その安定範囲が酸素分圧によって変わるためにMn酸化物析出が起こることが判り,酸素ポテンシャル勾配下での腐食分解を明確に実証することが困難であると結論された.後者では,酸素ポテンシャル勾配を与えた後の試料表面に,ポテンシャル勾配の方向に依らず酸化ランタンが析出する予想外の結果が出た.LaMnO_3中のLaの拡散がMn拡散より著しく速い場合,腐食分解で析出した酸化マンガンは移動してきたランタンと反応してペロブスカイト相に戻るのに対して,析出した酸化ランタンは取り残されてしまうことが原因と考えられる.
Developmert of Scanning Chemical Potertial Microscope

KAWADA Tatsuya, NIGARA Yutaka, KAWAMURA Kenichi, YASHIRO Keiji, MIZUSAKI Junichiro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

1999 - 2000

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The objective of this research has been to develop a "scanning chemical potential microscope" that measures the chemical potential profiles on catalysts or electrodes in order to investigate the reaction kinetics. In this research project, we have invented an oxygen potential probe, and applied it for the investigation of gas electrode reaction on a solid oxide electrolyte. (1)The concept of Porous Oxygen Sensor (POS), was developed. Stabilized zirconia or ceria was sintered into a porous pellet, and put on a sample surface. Oxygen potential on the sample surface was measured against a Pt reference electrode that was applied on the other side of POS by a potentiometric method. (2) The POS method was successfully applied to the kinetic study of oxygen incorporation reaction through a mixed ionic / electronic conductor electrode. The overvoltage for the two surface reaction processes were determined by using POS. (3) Kinetic model and the parameters obtained by POS were quite reasonable, proving that POS method is usable for a quantitative analysis. (4) POS microprobes were fabricated by coating zirconia powders on Pt based metal wires. The topologically identical structure with normal POS was realized in a micrometer space. A commercial probe for micro thermal analysis was used as a fine Pt-Rh probe base. It was coated with YSZ in two methods, i.e. slurry coating and thermal decomposition of metal organic precursors. By the latter method, a fine probe with lateral resolution higher than one micron was fabricated. (5) Sample heating stage was fabricated for the in-situ measurements of YSZ based electrolyte. It was installed on an atomic force micro probe scanner, and operated at 700 ℃. (6) Space resolved analysis of surface oxygen potential was successfully performed on a LaMnO3 based electrode.
ON THE POSSIBILITY OF VACANCY FORMATION ON THE B-SITE, THE FRAMEWORK, OF PEROVSKITE-TYPE OXIDES

MIZUSAKI Junchiro, KAWAMURA Kenichi, NIGARA Yutaka, KAWADA Tatsuya, YASHIRO Keiji

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: TOHOKU UNIVERSITY

1998 - 2000

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In the perovskite-type oxides, ABO_3, oxygen vacancies are easily formed while metal vacancies are not. Particularly, B-site vacancy is considered hardly exists because they are closely linked each other via oxygen ions to form a rigid crystal structure. LaMnO_3-based perovskite-type oxides are known to display metal deficient nonstoichiometry under oxygen rich atmospheres. The defect structure related to this nonstoichiometry has been a big unsolved problem. Neutron and X-ray diffraction studies could not reveal the position of defects whether on A-site only or on both A- and B-site. Moreover, there is no clear experimental evidence whether the predominant defect is oxygen interstitial or metal vacancy. This project aims to clarify the nature of defects in the perovskite-type oxides with particular focus on the metal deficient nonstoichiometry of LaMnO_3. Measurements were made on volume variation of dense LaMnO_3 with the variation of oxygen partial pressure between 0.0001 and 1 atm by a dilatometer. A sample of 15 mm in length expands with oxidation and contracts with reduction for 10 〜 20 μm in 10 days. A high temperature XRD analysis gives the change of lattice volume in the inverse direction. This result infers the predominant defect of metal deficient LaMnO_3 as metal vacancy. Since the diffusion of ions proceeds via vacancy, the diffusivity of A- and B-site ions are measured to compare the defect concentration of both sites. As an example of oxygen deficient perovskite-type oxides, YCrO_3 was selected and impurity diffusion coefficient of La on A-site and Mn on B-site were measured. Unexpectedly, the diffusion coefficient of La and Mn was essentially the same, suggesting that the concentration of vacancy on A- and B-site are the same. As to the metal deficient LaMnO_3, impurity difusion on B-site was found smaller than that on A-site by several orders of magnitude. In the metal deficient LaMnO_3, vacancies are predominantly formed on A-site.
高温機能性酸化物の欠陥・界面化学と新機能設計

山口周, 丸山俊夫, 栗田典明, 武津典彦, 川田達也, 水崎純一郎

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(C)

Institution: 名古屋工業大学

1999 - 1999

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不定比酸化物とこれに接触した電子構造の異なる物質間の不連続界面の特異な化学的機能発現が最近注目を集めている.その基礎的概念の構築と材料設計・プロセス解析等への応用の早急な展開を図るため,この領域の新進気鋭の研究者からなるグループを形成し,国内外の研究者による国際共同研究を企画することを目的として,以下の研究会を開催した. (1)国内ワークショップ:平成11年10月に東京で分担者および関連の研究者(2名)による研究会を開いた.参加者は個別の研究の進展状況を発表するとともに,関連分野の調査の進め方について議論した. (2)国際ワークショップ:平成11年11月に仙台において,海外から8名,国内から11名の研究者を本研究費により招聘し,各研究者の個別の研究テーマの進捗状況,今後の共同研究の進め方について議論を行った.また,このワークショップの成果を公開するとともに関連分野の新たなシーズを収集するために,一般参加者による研究紹介(ポスター:12件)も行った.ワークショップでは4日間にわたって集中的な議論が行われ,幅広い分野にわたる参加者による充実した議論と将来の共同研究のためのネットワークが形成された. 海外招聘者:J.Maier(ドイツ:マックスプランク固体科学研究所),M.Martin(ドイツ:ダルムシュタット工大),T.Norby(ノルウエー:オスロ大),H.I.Yoo(韓国:ソウル大),Y.H.Han(韓国:成均館大),J.H.Lee(韓国:韓国科技研),G.M.Choi(韓国:浦項科技大),Y.C.Chung(韓国:漢陽大) 国内招聘者:脇原将孝(東工大),服部武志,湯上浩雄(東北大),志村哲生(名大),稲熊宣之(学習院大),橋本拓也(日大),小林清,酒井夏子,横川晴美(工技院物質研),樋口透(東理大),安田勇(東京ガス)
混合導電性半導体のショットキー接合とイオン/電子輸送

川田達也

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 奨励研究(A)

Institution: 東北大学

1998 - 1999

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SrTiO3にNbを0.02mol%ドープした系について、導電率の酸素分圧依存性を詳細に解析し、酸化還元平衡定数,電子の易動度などの物性値を算出することができた。この系では,電子濃度は通常,ドープしたNbの量でほぼ決定されるが,高温,還元雰囲気で酸素空孔の生成によりキャリア濃度が増大することが分かった。これらの異なる起源のキャリアはどちらも同様の易動度を示した。また,より高温では荷電子帯からの熱励起によるキャリアの生成も見られた。ここからバンドギャップを算出すると約3.2eV程度であった。さらに,酸素同位体拡散の実験を行い,酸素の同位体拡散定数を得た。これらを総合的に解析し,この系の酸素イオン空孔濃度および酸化物イオン導電率を酸素分圧の関数として見積もった。また,上記試料の単結晶と白金との界面でのSchottky障壁の形成について,I-V測定,およびC-V測定を行った。この結果,600℃までの挙動は,emissionモデルと拡散モデルの中間的な挙動として記述できることがわかった。このとき,C-V法によって障壁高さを求めたところ,約1.2eV前後となった。また,この障壁高さは平衡酸素分圧の変化に伴って可逆的に変化した。この原因がSrTi(Nb)O3表面近傍の酸素空孔等に起因するものか,あるいは白金側の表面の酸化還元に起因するものかは明らかになっていない。この試料に大きな電圧を印可すると,場合によって,電流値が非常に長い緩和時間をもって変化する現象がみられた。これは試料内部での酸素空孔分布の変化とそれに伴う表面近傍の電子状態の変化を反映すると考えられる。
自動車排ガス制御用高温作動一酸化窒素センサーの開発

水崎純一郎, 河村憲一, 二唐裕, 川田達也

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(A)

Institution: 東北大学

1996 - 1998

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高温燃焼で生成する微量酸化窒素は800℃程度以下の排ガス中では非平衡であり,触媒の表面では二酸化窒素は強力な酸化剤,一酸化窒素は分解反応経路により酸化剤にも還元剤にも働き,分解して平衡化する。これらの分子が触媒上に次々と供給され定常的に分解するとき,触媒はその分解時に酸化窒素から解放される強力な酸化力(あるいは還元力)に包まれ,気相中の酸素ガス圧に比べて極めて高い(あるいは低い)酸素圧下にあるのと同じ状態になると考えられる。この仮説が正しいならば,その触媒となっている酸化物バルクの物性変化を利用した高温作動する窒素酸化物センサーができる筈である。この仮説を検証するため,微量窒素酸化物ガス中でのコバルト系ペロブスカイト型酸化物緻密焼結体の不定比酸素量の変化を高温微重量天秤を用いて精密計測した.その結果,酸化物中の酸素の濃度は平衡酸素圧から予想される値を遥かに越え,導入した二酸化窒素の分圧より約1桁高い酸素ガスと平衡の時の濃度になることが実証された。たとえば,500ppmの二酸化窒素は700℃で1%の酸素ガスに相当する酸化力を示し,酸化物中の不定比酸素量がそれに対応して増加する.これは,酸化物触媒の機能の本質を端的に明らかにしたものでもあり,触媒研究においても極めて重大な発見である。これと並行して,銅系,鉄系,チタン系のペロブスカイト型酸化物の導電率が酸素を含む気流中の微量窒素酸化物によつて平衡値から大きく変化することを明らかにした。特に単結晶チタン駿ストロンチウムは,微量二酸化窒素により数十気圧の酸素との平衡状態に相当する導電率を示し,種々の計測から,これが本研究で提起した原理によるものであることを明らかにした。本研究で発想した原理に基づく―酸化窒素による導電率変化はチタン酸ストロンチウム単結晶で明瞭に確認されが,一般に一酸化窒素の還元効果は極めて弱いことが明らかになった.

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Social Activities 15

SOFC研究会第4回基礎セミナー

2010/11/03 - 2010/11/04

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SOFCの電気化学・測定法
電気化学会関西支部第40回電気化学講習会「みんなで考える"交流インピーダンス法 -帰ってきた"みんなで考える交流法」

2010/11/01 - 2010/11/02

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交流法固体酸化物形燃料電池
科学者の卵講演会

2010/11/13 -

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講演「明日のエネルギーを変える？ ”電池”の技術」
電気化学会関東支部第46回学際領域セミナー「ナノイオニクスがひらくエネルギーデバイスの未来」

2010/11/05 -

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固体電解質上の気固相反応とその応用の可能性
角館高校への出張講義（東北産業活性化センター主催）

2009/11/20 -

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進化し続ける燃料電池〜エネルギーを無駄無く使う方法〜
秋田高校「学部学科ガイダンス」

2009/06/24 -

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出張講義
パシフィックノースウェスト国立研究所セミナー

2003/10/29 -

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講演
ワシントン大学化学工学科セミナー

2003/10/28 -

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講演"Oxygen Reduction Kinetics on Perovskite Type Oxide Electrodes at Elevated Temperatures"
SOFC研究会

2003/06/13 -

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SOFC国際シンポジウム報告
CREST公開シンポジウム「電気化学エネルギー変換界面」

2003/02/07 -

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講演
SOFC研究会

2003/01/29 -

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US-EU Workshop報告
リアライズセミナー（サイペック（株））

2003/01/28 -

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講演「ポータブル固体酸化物燃料電池の可能性」
出前授業

2002/04 -

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高校へ出向いて講義
技術情報協会セミナー

2001/11/26 -

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講演「固体酸化物燃料電池における低温作動化技術と自動車への応用」
固体電気化学実験法入門

1995/12 -

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固体化学の指針を探る研究会主催講習会

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Other 3

固体酸化物形燃料電池等実用化推進技術開発／固体酸化物形燃料電池の耐久性迅速評価に関する基礎研究

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セル構造体の解析
実環境計測に基づく高温電極の界面領域エンジニアリング

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固体酸化物形燃料電池（SOFC）による超高効率発電／コジェネレーションは，再生可能エネルギーの不安定性を補いつつ低炭素で自律可能なエネルギーシステムを構築するための重要なツールである。本格的普及のためには，コストの削減と耐久性・効率の向上を同時に満たすことが必要であり，基礎に立ち帰ったブレークスルーが必要になる。特に重要なのが電極のエンジニアリングである。SOFCのガス電極は，電極と電解質の単純な界面としてではなく，三次元的な広がりを持つ「界面領域」として捉えたエンジニアリングが必要である。そこで本研究では，SOFC動作環境下の界面ナノ，ミクロ，マクロ領域に適用可能な「その場」計測法を開発するとともに，これらを統合した評価プロセスを構築することによって，界面領域エンジニアリングを可能にすることを目的とする。具体的には，界面領域の挙動を，①ナノ領域での化学種の挙動と電子状態，②ミクロ領域での物質輸送と微細構造・組成，そして③これらの結果として現れるマクロ挙動，のマルチスケールで捉え，各スケールでの挙動を実環境下またはそれに近い環境で測定する手法を開発・整備し，これらの計測手法を直接的・間接的に連携させて総合的な評価スキームを構築することを目指す。
固体酸化物形燃料電池システム要素技術開発事業／耐久性・信頼性向上に関する基礎研究／機械的解析による劣化機構の解明、加速試験方法の確立

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固体酸化物形燃料電池の機械的損傷を伴う劣化の発生機構を解明し、各種セルの短期・長期信頼性を評価する手法を提案する。このために、まず、スタック開発各社との情報交換、実セル試験片の解析、または単セルやスタックへのＡＥ法適用による共同実験を必要に応じて実施し、実機で生じる機械的劣化現象とそれを引き起こす負荷（=劣化因子）との対応関係を解明する。抽出した劣化現象を抽象化して再現する模擬セルを設計・試作し、各劣化因子に対する負荷加速試験法（過負荷試験法）を確立する。得られた結果を、各種の実セルの信頼性評価と劣化対策に繋げるためのスキームを確立する。これらの項目の実施に必要な機械的損傷のその場検出などの実験手法、及び、セルの微構造や動的な内部化学ポテンシャル変化を考慮したシミュレーション手法は未だ確立しておらず、上記の項目の実施に並行してこれらの開発を進める。さらに、各材料の物性データ・機械特性データを調査・取得して、上記の解析を進めるための基盤として整備する。