Reaction pathway in mixed-conducting oxide electrodes investigated by using patterned thin film model electrode
Project/Area Number |
18H02067
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 36020:Energy-related chemistry
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Research Institution | Tohoku University |
Principal Investigator |
Amezawa Koji 東北大学, 多元物質科学研究所, 教授 (90263136)
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Co-Investigator(Kenkyū-buntansha) |
井口 史匡 東北大学, 工学研究科, 准教授 (00361113)
八代 圭司 東北大学, 環境科学研究科, 准教授 (20323107)
中村 崇司 東北大学, 多元物質科学研究所, 准教授 (20643232)
木村 勇太 東北大学, 多元物質科学研究所, 助教 (60774081)
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Project Period (FY) |
2018-04-01 – 2021-03-31
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Project Status |
Completed (Fiscal Year 2020)
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Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2020: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2019: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2018: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
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Keywords | 固体酸化物形燃料電池 / 空気極 / 混合導電性酸化物 / 反応経路 / パターン電極 / オペランド計測 / 電極反応 / モデル電極 |
Outline of Final Research Achievements |
In this work, the identification of reaction path in solid oxide fuel cell (SOFC) cathodes, in particular, separate evaluation of the contribution of electrode reaction through triple/double phase boundaries, were performed. For these purposes, we proposed and fabricated original model electrodes, so-called patterned thin film electrode, and performed electrochemical/spectroscopic measurements with them. As results, dominant reaction path in conventional SOFC cathodes were identified. It was found that the contribution of the reaction through triple phase boundaries were significant even in mixed ionic and electronic conducting SOFC cathodes. This finding demonstrated that a new concept considering the contribution of triple phase boundary is necessary for the design of high performance SOFC cathode. Furthermore, the proposed patterned thin film electrode was also applied to investigate the mechanism of Cr poisoning for SOFC cathodes.
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Academic Significance and Societal Importance of the Research Achievements |
本研究では,独自に開発したパターン緻密膜電極を用いることで,固体酸化物形燃料電池(SOFC)空気極における反応経路およびその分離評価を可能とする手法を確立した。これにより,混合導電性SOFC空気極における主たる反応経路が二相界面であるという従来の常識が誤りであり,SOFC高性能化のためには,三相界面反応を考慮した新たな電極設計・開発指針が必要があることを初めて示した。また,同手法が,SOFC空気極における劣化機構の解明にも適用できることを示した。これらの成果は,SOFCの高性能化,耐久性化を達成する上で,これまでに知られていなかった重要な知見であり,その学術的・社会的意義は大きい。
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Report
(4 results)
Research Products
(49 results)
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[Journal Article] Correlation between Electrode Reaction and Chromium Deposition in SOFC Cathodes2019
Author(s)
Shota Kageyama, Yusuke Shindo,Yoshinobu Fujimaki, Keita Mizuno,Yuta Kimura, Takashi Nakamura, Fumitada Iiguchi, Keiji Yashiro,Hiroo Yugami, Tatsuya Kawada, Koji Amezawa
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Journal Title
Electrochemical Society Transactions
Volume: 91
Pages: 1231-1237
Related Report
Peer Reviewed
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[Journal Article] Impact of Triple Phase Boundary Reaction in SOFC Mixed Conducting Cathodes2018
Author(s)
Keita Mizuno, Yoshinobu Fujimaki, Takashi Nakamura, Yuta Kimura, Kiyofumi Nitta, Oki Sekizawa, Yasuko Terada, Fumitada Iguchi, Keiji Yashiro, Hiroo Yugami, Tatsuya Kawada, Koji Amezawa
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Journal Title
13th European SOFC & SOE Forum 2018
Volume: 1
Pages: 68-76
Related Report
Peer Reviewed
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[Journal Article] Influence of Electrode Reaction on Cr-poisoning in SOFC MIEC Cathodes2018
Author(s)
Shota Kageyama, Yusuke Shindo, Yoshinobu Fujimaki, Keita Mizuno, Yuta Kimura,Takashi Nakamura, Fumitada Iguchi, Keiji Yashiro, Hiroo Yugami, Tatsuya Kawada, Koji Amezawa
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Journal Title
13th European SOFC & SOE Forum 2018
Volume: 1
Pages: 51-58
Related Report
Peer Reviewed
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[Presentation] Cathodic Reaction in Intermediate Temperature Fuel Cells Investigated by Using Patterned Thin Film Model Electrodes2019
Author(s)
Koji Amezawa, Keita Mizuno, Katsuya Nishidate, Takaaki Imaizumi, Yuki Shinomiya, Yuta Kimura, Takashi Nakamura, Keiji Yashiro, Oki Sekizawa, Kiyofumi Nitta, Fumitada Iguchi, Hiroo Yugami, Tatsuya Kawada
Organizer
22nd International Conference on Solid State Ionics
Related Report
Int'l Joint Research / Invited
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[Presentation] Evaluation of the electrode reaction mechanismin anLa0.6Sr0.4CoO3-δ PCFC cathode2019
Author(s)
Katsuya Nishidate, Yuki Shinomiya, Keita Mizuno, Yuta Kimura, Takashi Nakamura, Keiji Yashiro, Tatsuya Kawada, Yuichi Mikami, Shigenori Onuma, Tomohiro Kuroha, Noboru Taniguchi, Yoichiro Tsuji, Koji Amezawa
Organizer
22nd International Conference on Solid State Ionics
Related Report
Int'l Joint Research
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[Presentation] Evaluationof Factors Influencing Cr-Poisoning in SOFC Cathodes2019
Author(s)
Shota Kageyama, Yusuke Shindo,Yoshinobu Fujimaki, Keita Mizuno,Yuta Kimura, Takashi Nakamura, Fumitada Iiguchi, Keiji Yashiro,Hiroo Yugami, Tatsuya Kawada, Koji Amezawa
Organizer
22nd International Conference on Solid State Ionics
Related Report
Int'l Joint Research
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[Presentation] Correlation between Electrode Reaction and Chromium Deposition in SOFC Cathodes2019
Author(s)
Shota Kageyama, Yusuke Shindo,Yoshinobu Fujimaki, Keita Mizuno,Yuta Kimura, Takashi Nakamura, Fumitada Iiguchi, Keiji Yashiro,Hiroo Yugami, Tatsuya Kawada, Koji Amezawa
Organizer
SOFC-XVI
Related Report
Int'l Joint Research
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[Presentation] Electrochemical active sites in PCFC cathodes investigated by using patterned thin film model electrodes2019
Author(s)
Koji Amezawa, Katsuya Nishidate, Yuki Shinomiya, Keita Mizuno, Yuta Kimura, Takashi Nakamura, Keiji Yashiro, Tatsuya Kawada, Yuichi Mikami, Shigenori Onuma, Tomohiro Kuroha, and Noboru Taniguchi
Organizer
PACRIM13
Related Report
Int'l Joint Research
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[Presentation] Evaluation of the electrode reaction mechanism in PCFCs catahode by using patterned thin film model electrodes2019
Author(s)
Katsuya Nishidate, Yuki Shinomiya, Keita Mizuno, Yuta Kimura, Takashi Nakamura, Keiji Yashiro, Tatsuya Kawada, Yuichi Mikami, Shigenori Onuma, Tomohiro Kuroha, Noboru Taniguchi, Yoichiro Tsuji, and Koji Amezawa
Organizer
PACRIM13
Related Report
Int'l Joint Research
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[Presentation] Cathodic Reaction in SOFC and PCFC Investigated by Using Patternted Thin Film Model Electrode2018
Author(s)
Koji Amezawa, Keita Mizuno, Yuki Shinomiya, Yoshinobu Fujimaki, Takashi Nakamura, Yuta Kimura, Kiyofumi Nitta, Oki Sekizawa, Keiji Yashiro, Fumitada Iguchi, Hiroo Yugami, Tatsuya Kawada
Organizer
Materials Science and Technology 2018
Related Report
Int'l Joint Research / Invited
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