Electrical properties and sulfur tolerance of La0.75Sr0.25Cr1-xMnxO3 under anodic conditions

被引：171

作者：

Zha, SW ^{[1
]}

Tsang, P ^{[1
]}

Cheng, Z ^{[1
]}

Liu, ML ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2005年 / 178卷 / 06期

基金：

美国国家科学基金会;

关键词：

La0.75Sr0.25Cr1-xMnxO3; electrical properties; chemical stability; solid oxide fuel cell; sulfur-tolerant anode;

D O I：

10.1016/j.jssc.2005.03.027

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Complex metal oxides with composition of La0.75Sr0.25Cr1-xMnxO3 (x = 0.4, 0.5, 0.6) (LSCM) have been synthesized and examined as anode materials for solid oxide fuel cells (SOFCs). LSCM compositions show excellent tolerance to both reduction and oxidation but the crystal structure transforms from hexagonal in air to orthorhombic in H-2. The volume change associated with this phase transformation is only about 1%, thus having little effect on other properties. The total electrical conductivity increases with the content of Mn, whereas the resistance to Sulfur poisoning increases with the content of Cr. Fuel cells using LSCM as the anode show very good performance when pure hydrogen is used as the fuel. However, they do not appear to be stable in fuels containing 10% of H2S. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：1844 / 1850

页数：7

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