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

T. Koshiyama, H. Nakajima, T. Karimata, T. Kitahara, K. Ito, S. Masuda, Y. Ogura, J. Shimano

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

9 被引用数 (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.

本文言語英語
ホスト出版物のタイトルSolid Oxide Fuel Cells 14, SOFC 2015
編集者S. C. Singhal, K. Eguchi
出版社Electrochemical Society Inc.
ページ2217-2226
ページ数10
1
ISBN(電子版)9781623322717
DOI
出版ステータス出版済み - 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月 26 20157月 31 2015

出版物シリーズ

名前ECS Transactions
番号1
68
ISSN(印刷版)1938-6737
ISSN(電子版)1938-5862

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
国/地域英国
CityGlasgow
Period7/26/157/31/15

!!!All Science Journal Classification (ASJC) codes

  • 工学(全般)

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