Preparation, chemical stability and electrochemical properties of LSCF-CBO composite cathodes

Zhao  H; Huo  LH; Sun  LPYu  LJGao  SZhao  JG

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Preparation, chemical stability and electrochemical properties of LSCF-CBO composite cathodes

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La0.6Sr0.4Co0.2Fe0.8O3-Ce0.7Bi0.3O2 (LSCF-CBO) composite electrode has been prepared by polymer-gel method. SEM results showed that the composite electrode formed good contact with Ce0.9Gd0.1O2-delta (CGO) electrolyte after sintering at 900degreesC for 2h. AC impedance spectroscopy and dc polarization measurements were used to study the composite electrode performances in different atmospheres. The (p(O2))(1/2) relationship of R-p (polarization resistance) with oxygen partial pressure has been observed, which indicated that the oxygen adsorption/desorption process was the reaction rate limiting step. The polarization resistance decreased with increasing CBO contents. The optimum value of 35 vol. CBO in LSCF resulted in 0.16 Omega cm(2) area specific resistivity (ASR) at 706degreesC in air, which indicated that the LSCF-CBO composite electrode was a promising cathode material in ITSOFC. (C) 2004 Elsevier B.V. All rights reserved.

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《Materials Chemistry and Physics》 |2004年第1期|160-166|共7页
作者
Zhao H; Huo LH; Sun LPYu LJGao SZhao JG;
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作者单位

Heilongjiang Univ, Coll Chem & Chem Technol, Harbin 150080, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类工程材料学;
关键词
ceramics; electrochemical techniques; electrochemical properties; CERAMIC FUEL-CELLS; IMPEDANCE SPECTROSCOPY; ELECTRODE-KINETICS; REACTION MODEL; ZIRCONIA; PERFORMANCE; ROUTE;

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Preparation, chemical stability and electrochemical properties of LSCF-CBO composite cathodes

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