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Study on the Perovskite-type Oxide Cathodes in Proton-conducting SOFC

Published online by Cambridge University Press:  26 February 2011

Hidenori Yahiro ,
Hiroyuki Yamaura  and
Makiko Asamoto
Hidenori Yahiro
Affiliation:
hyahiro@eng.ehime-u.ac.jp, Graduate School of Science and Engineering, Ehime University, Department of Materials Science and Biotechnology, 3 Bunkyo-cho, Matsuyama, 790-8577, Japan, +81-89-927-9929, +81-89-927-9946
Hiroyuki Yamaura
Affiliation:
yamaura@eng.ehime-u.ac.jp, Graduate School of Science and Engineering, Ehime University, Department of Materials Science and Biotechnology, 3 Bunkyo-cho, Matsuyama, 790-8577, Japan
Makiko Asamoto
Affiliation:
macky_0526@hotmail.com, Graduate School of Science and Engineering, Ehime University, Department of Materials Science and Biotechnology, 3 Bunkyo-cho, Matsuyama, 790-8577, Japan
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Abstract

The cathode performances of perovskite-type oxide electrodes were investigated in the H2-O2 fuel cell with proton-conducting electrolyte. Among the perovskite-type oxides tested in the present study, La1-xSrxFeO3(LSFO) showed the best cathode performance. The cathode performances of LSFO depended on the Sr content and the heat-treatment temperature prior to electrochemical measurements. The cathode reactions of both LSFO and Pt electrodes are discussed briefly based on the cathode overpotentials measured as a function of oxygen partial pressure. Finally, the structure and the electrical conductivity of the proton-conducting ceramic film fabricated on LSFO electrode substrate are presented.

Keywords

ionic conductorelectrical propertiesthin film
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 972: Symposium AA – Solid-State Ionics—2006 , 2006 , 0972-AA01-06
Copyright
Copyright © Materials Research Society 2007

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