Evaluation and optimization of SrCo0.9Ta0.1O3-δ perovskite as cathode for solid oxide fuel cells

被引：30

作者：

Zhou, Qingjun ^{[1
]}

Wei, Tong ^{[1
]}

Shi, Yihua ^{[1
]}

Guo, Songqing ^{[1
]}

Li, Yan ^{[1
]}

Su, Jingxin ^{[1
]}

Ren, Huan ^{[2
]}

Zhu, Yin ^{[1
]}

机构：

[1] Civil Aviat Univ China, Coll Sci, Tianjin 300300, Peoples R China

[2] Shenyang Metrol Testing Inst, Shenyang 110179, Peoples R China

来源：

CURRENT APPLIED PHYSICS | 2012年 / 12卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Solid oxide fuel cells; Electrical conductivity; Thermal expansion coefficient; Impedance spectroscopy; COMPOSITE CATHODE; TRANSPORT-PROPERTIES; OXYGEN PERMEABILITY; POTENTIAL CATHODE; STABILITY; PERFORMANCE; MEMBRANES;

D O I：

10.1016/j.cap.2012.01.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The SrCo0.9Ta0.1O3-delta (SCT) perovskite-type oxide is synthesized by the conventional solid state reaction method and examined as an alternative cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs). The electrical conductivity of SCT sample reaches 250-152 S cm(-1) in the temperature range 600-800 degrees C. SCT exhibits good chemical compatibility with the intermediate-temperature electrolyte material Sm0.2Ce0.8O1.9 (SDC). The average thermal expansion coefficient of SCT is 21.4 x 10(-6) K-1. The cathode area specific resistance (ASR) of SCT is only 0.095 Omega cm(2) at 750 degrees C and it decreases to 0.068 Omega cm(2) when SDC is added to form a SCT-SDC composite cathode. The results indicate that the SCT can be a promising alternative cathode material for IT-SOFCs. (C) 2012 Elsevier B. V. All rights reserved.

引用

页码：1092 / 1095

页数：4

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