Correlation of thermal properties and electrical conductivity of La0.7Sr0.3Cu0.2Fe0.8O3-δ material for solid oxide fuel cells

被引：11

作者：

Wackerl, Juergen ^{[1
]}

Koppitz, Thomas ^{[1
]}

Peck, Dong-Hyun ^{[2
]}

Woo, Sang-Kuk ^{[2
]}

Markus, Torsten ^{[1
]}

机构：

[1] Forschungszentrum Julich, Julich, Germany

[2] KIER, Taejon, South Korea

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2009年 / 39卷 / 08期

关键词：

Cathode; Oxygen stoichiometry; Mixed conductor; SOFC; Perovskite; SOFC CATHODES; OXYGEN NONSTOICHIOMETRY; HIGH-TEMPERATURES; TRANSPORT; PEROVSKITES; MECHANISMS; EXPANSION; FERRITE;

D O I：

10.1007/s10800-009-9790-9

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A copper-doped ferrite with the chemical composition La0.7Sr0.3Cu0.2Fe0.8O3-delta (LaSrCuFe) was prepared using the classical ceramics method starting from the oxides. The linear thermal expansion coefficient in air was measured in the temperature range between 550 and 1,250 K to be between 10 x 10(-6) and 15 x 10(-6) K-1. The electrical conductivity in air was found to be higher than 100 S cm(-1) for temperatures lower than 1,100 K. A change of oxygen stoichiometry was found above 650 K in an atmosphere of 20 vol% oxygen with argon. This change can be correlated with the electrical conductivity.

引用

页码：1243 / 1249

页数：7

共 27 条

[1] Factors governing oxygen reduction in solid oxide fuel cell cathodes [J].