Direct current distribution measurement of an electrolyte-supported planar solid oxide fuel cell under the rib and channel by segmented electrodes

T. Koshiyama, Hironori Nakajima, T. Karimata, Tatsumi Kitahara, Kohei Ito, S. Masuda, Y. Ogura, J. Shimano

研究成果: 著書/レポートタイプへの貢献会議での発言

6 引用 (Scopus)

抄録

In the planar SOFCs, the fuel/oxidant distributions and current collecting resistance cause current and temperature distributions over the electrodes under the separator ribs and flow channels. Optimized design of the separator is hence required to improve the output power and chemical/thermo-mechanical durabilities of practical stacks. To clarify the distributions, we prepare planar cells having three segmented cathodes. Current-voltage characteristics are measured with voltage control using three electric loads to reproduce the electrode potentials of a single cell at around 800°C. We find significantly small in-plane oxygen transport rate under the cathode rib and higher current collecting resistance under the channel. Increased anode rib width gives large overpotential under the rib due to fuel starvation. Finite element modeling supports the above experimental results. We demonstrate an improved separator design of a practical stack, taking advantage of this model. Thereby ca. 17% higher maximum power is given in the finite element simulation.

元の言語英語
ホスト出版物のタイトルSolid Oxide Fuel Cells 14, SOFC 2015
出版者Electrochemical Society Inc.
ページ2217-2226
ページ数10
68
エディション1
ISBN(電子版)9781607685395
DOI
出版物ステータス出版済み - 1 1 2015
イベント14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage - Glasgow, 英国
継続期間: 7 26 20157 31 2015

その他

その他14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
英国
Glasgow
期間7/26/157/31/15

Fingerprint

Solid oxide fuel cells (SOFC)
Separators
Electrolytes
Electrodes
Cathodes
Electric loads
Channel flow
Current voltage characteristics
Oxidants
Voltage control
Anodes
Durability
Temperature distribution
Oxygen

All Science Journal Classification (ASJC) codes

  • Engineering(all)

これを引用

Koshiyama, T., Nakajima, H., Karimata, T., Kitahara, T., Ito, K., Masuda, S., ... Shimano, J. (2015). Direct current distribution measurement of an electrolyte-supported planar solid oxide fuel cell under the rib and channel by segmented electrodes. : Solid Oxide Fuel Cells 14, SOFC 2015 (1 版, 巻 68, pp. 2217-2226). Electrochemical Society Inc.. https://doi.org/10.1149/06801.2217ecst

Direct current distribution measurement of an electrolyte-supported planar solid oxide fuel cell under the rib and channel by segmented electrodes. / Koshiyama, T.; Nakajima, Hironori; Karimata, T.; Kitahara, Tatsumi; Ito, Kohei; Masuda, S.; Ogura, Y.; Shimano, J.

Solid Oxide Fuel Cells 14, SOFC 2015. 巻 68 1. 編 Electrochemical Society Inc., 2015. p. 2217-2226.

研究成果: 著書/レポートタイプへの貢献会議での発言

Koshiyama, T, Nakajima, H, Karimata, T, Kitahara, T, Ito, K, Masuda, S, Ogura, Y & Shimano, J 2015, Direct current distribution measurement of an electrolyte-supported planar solid oxide fuel cell under the rib and channel by segmented electrodes. : Solid Oxide Fuel Cells 14, SOFC 2015. 1 Edn, 巻. 68, Electrochemical Society Inc., pp. 2217-2226, 14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage, Glasgow, 英国, 7/26/15. https://doi.org/10.1149/06801.2217ecst
Koshiyama T, Nakajima H, Karimata T, Kitahara T, Ito K, Masuda S その他. Direct current distribution measurement of an electrolyte-supported planar solid oxide fuel cell under the rib and channel by segmented electrodes. : Solid Oxide Fuel Cells 14, SOFC 2015. 1 版 巻 68. Electrochemical Society Inc. 2015. p. 2217-2226 https://doi.org/10.1149/06801.2217ecst
Koshiyama, T. ; Nakajima, Hironori ; Karimata, T. ; Kitahara, Tatsumi ; Ito, Kohei ; Masuda, S. ; Ogura, Y. ; Shimano, J. / Direct current distribution measurement of an electrolyte-supported planar solid oxide fuel cell under the rib and channel by segmented electrodes. Solid Oxide Fuel Cells 14, SOFC 2015. 巻 68 1. 版 Electrochemical Society Inc., 2015. pp. 2217-2226
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AU - Koshiyama, T.

AU - Nakajima, Hironori

AU - Karimata, T.

AU - Kitahara, Tatsumi

AU - Ito, Kohei

AU - Masuda, S.

AU - Ogura, Y.

AU - Shimano, J.

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N2 - In the planar SOFCs, the fuel/oxidant distributions and current collecting resistance cause current and temperature distributions over the electrodes under the separator ribs and flow channels. Optimized design of the separator is hence required to improve the output power and chemical/thermo-mechanical durabilities of practical stacks. To clarify the distributions, we prepare planar cells having three segmented cathodes. Current-voltage characteristics are measured with voltage control using three electric loads to reproduce the electrode potentials of a single cell at around 800°C. We find significantly small in-plane oxygen transport rate under the cathode rib and higher current collecting resistance under the channel. Increased anode rib width gives large overpotential under the rib due to fuel starvation. Finite element modeling supports the above experimental results. We demonstrate an improved separator design of a practical stack, taking advantage of this model. Thereby ca. 17% higher maximum power is given in the finite element simulation.

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