Comparison of Sr-doped and Sr-free La1-xSrxMn0.5Cr0.5O3±δ SOFC Anodes

被引：29

作者：

Deleebeeck, L. ^{[1
]}

Fournier, J. L. ^{[1
]}

Birss, V. ^{[1
]}

机构：

[1] Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada

来源：

SOLID STATE IONICS | 2010年 / 181卷 / 25-26期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Solid oxide fuel cells; Anodes; Hydrogen oxidation; LSCM; Mixed ionic and electronic conductors; Perovskites La1-xSrxMn1-yCryO3 +/-delta; GDC; Conductivity; METHANE OXIDATION; ELECTROCHEMICAL PROPERTIES; OXYGEN NONSTOICHIOMETRY; ELECTRICAL-PROPERTIES; DEFECT STRUCTURE; COMPOSITE ANODE; OXIDE; CONDUCTIVITY; PERFORMANCE; TEMPERATURE;

D O I：

10.1016/j.ssi.2010.05.027

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Single phase La1-xSrxMn0.5Cr0.5O3 +/-delta (LSMC, x(Sr)= 0 and 0.2) and composite LSMC:Gd-doped ceria (GDC) mixed ionic and electronic conducting anodes were studied in half-cell and full-cell electrochemical configurations using humidified fuel environments at 700 to 800 degrees C. We demonstrate here that the removal of Sr from La1-xSrxMn0.5Cr0.5O3 +/-delta improves both the thermo-chemical stability and the electronic conductivity of these materials in a humidified H-2 environment, while also enhancing their H-2 oxidation activity, when operating at 700 and 800 degrees C. It is also shown that the addition of 50:50 wt.% GDC: LaMr(0.5)Cr(0.5)O(3 +/-delta) results in the retention of all of these benefits, as compared to a mixture of GDC with the Sr-containing La0.8Sr0.2Mn0.5Cr0.5O3 +/-delta (x(Sr)= 0.2) oxide. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1229 / 1237

页数：9

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