Synthesis and characterization of La0.6Sr0.4Co0.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ

被引：61
|
作者：
Ried, P. [1 ]
Holtappels, P. [1 ]
Wichser, A. [2 ]
Ulrich, A. [2 ]
Graule, T. [1 ]
机构：
[1] Empa, Swiss Fed Labs Mat Testing & Res, Lab High Performance Ceram, CH-8600 Dubendorf, Switzerland
[2] Analyt Chem Lab, CH-8600 Dubendorf, Switzerland
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2008年 / 155卷 / 10期
关键词：
D O I：
10.1149/1.2960873
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
This study compares the electrical transport and the oxygen exchange properties of two mixed conducting materials between 600 and 800 degrees C, namely La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) and Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF). Both materials were synthesized by spray pyrolysis and characterized by the electrical conductivity relaxation technique. LSCF has the higher electrical conductivity (257-412 S cm(-1) between 450 and 900 degrees C), while BSCF shows faster oxygen exchange kinetics and diffusion. The expansion of both materials between 600 and 800 degrees C (BSCF = 27.3 ppm/K, LSCF = 15.5 ppm/K below 700 degrees C up to 27.5 ppm/K at T > 800 degrees C) does not match with the common electrolytes for solid oxide fuel cells. (C) 2008 The Electrochemical Society.
引用
收藏
页码：B1029 / B1035
页数：7
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