Development of LSM/YSZ composite cathode for anode-supported solid oxide fuel cells

被引：60

作者：

Leng, YJ ^{[1
]}

Chan, SH ^{[1
]}

Khor, KA ^{[1
]}

Jiang, SP ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Mech & Prod Engn, Fuel Cell Strateg Res Programme, Singapore 639798, Singapore

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2004年 / 34卷 / 04期

关键词：

cathodic treatment; composite cathode; electrolyte surface grinding; LSM non-stoichiometry; solid oxide fuel cell;

D O I：

10.1023/B:JACH.0000016627.29374.24

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

This paper presents the effect of (La, Sr)MnO3 (LSM) stoichiometry on the polarization behaviour of LSM/Y2O3ZrO2 (YSZ) composite cathodes. The composite cathode made of A-site deficient (La0.85Sr0.15)(0.9)MnO3 (LSM-B) showed much lower electrode interfacial resistance and overpotential losses than that made of stoichiometric (La0.85Sr0.15)(1.0)MnO3 (LSM-A). The much poorer performance of the latter is believed to be due to the formation of resistive substances such as La2Zr2O7/SrZrO3 between LSM and YSZ phases in the composite electrode. A slight A-site deficiency (similar to0.1) was effective in inhibiting the formation of these resistive substances. A power density of similar to1 W cm(-2) at 800degreesC was achieved with an anode-supported cell using an LSM-B/YSZ composite cathode. In addition, the effects of cathodic current treatment and electrolyte surface grinding on the performance of composite cathodes were also studied.

引用

页码：409 / 415

页数：7

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