Contribution of triple-phase boundary reaction in cathodic reaction of solid oxide fuel cell

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

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

The cathodic reaction of a solid oxide fuel cell (SOFC) was investigated by 18O/16O isotope exchange with/without polarization and isotopic distribution analysis by second ion mass spectroscopy. In order to elucidate the contribution of triple phase boundary (TPB) reaction while eliminating the influence of the electrode microstructure, a patterned thin film electrode was used as a model cathode. La0.6Sr0.4CoO3-δ was chosen as a model material exhibiting mixed ionic and electronic conduction. A slight increase in the 18O ratio was observed within 20 μm from the electrode/electrolyte interface under a constant cathodic polarization of 220 mV at 973 K in 1 bar of P(O2). Such an increase in the 18O ratio was considered to be caused by the electrochemical oxygen incorporation. The contribution of the TPB reaction to the total cathode reaction was not clearly observed at least in applied experimental conditions.

本文言語English
ホスト出版物のタイトルECS Transactions
編集者T. Kawada, S. C. Singhal
出版社Electrochemical Society Inc.
ページ847-853
ページ数7
1
ISBN(電子版)9781607685395
DOI
出版ステータスPublished - 2017 5 30
イベント15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 - Hollywood, United States
継続期間: 2017 7 232017 7 28

出版物シリーズ

名前ECS Transactions
番号1
78
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

Other

Other15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017
CountryUnited States
CityHollywood
Period17/7/2317/7/28

ASJC Scopus subject areas

  • Engineering(all)

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