Degradation mechanism with impurities and life time estimation for SOFCs

T. Horita, D. H. Cho, F. Wang, M. Nishi, T. Shimonosono, H. Kishimoto, K. Yamaji, M. E. Brito, H. Yokokawa

研究成果: Conference contribution

4 被引用数 (Scopus)

抄録

The degradation of La0.6Sr0.4Co0.2Fe 0.8O3 (LSCF) cathode performance were investigated under relatively high pressures of impurities with Cr and S. AC impedance and DC currents were measured as a function of operation time. The cathode polarization rapidly increased when exposure to CrO3 and SO2 due to active sites vanishing with impurities. The distributions of Cr and S in the porous LSCF were different due to the chemical reactivity and electrochemical effects. A significant amount of SrCrO4 was deposited at the gas inlet of cathode surface region whereas small spots of SrSO4 were distributed inside the porous LSCF cathode. From the trends of polarization increase, the decrease trends and life time of cathodes were estimated for the availability of cathodes.

本文言語English
ホスト出版物のタイトルFuel Cell Seminar 2011
出版社Electrochemical Society Inc.
ページ297-304
ページ数8
1
ISBN(電子版)9781566779807
ISBN(印刷版)9781566779807
DOI
出版ステータスPublished - 2012
外部発表はい
イベント2011 Fuel Cell Seminar and Exposition - Orlando, FL, United States
継続期間: 2011 10月 312011 11月 3

出版物シリーズ

名前ECS Transactions
番号1
42
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

Other

Other2011 Fuel Cell Seminar and Exposition
国/地域United States
CityOrlando, FL
Period11/10/3111/11/3

ASJC Scopus subject areas

  • 工学一般

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