The effect of reduction atmosphere on the LaGaO3-based solid oxide fuel cell

被引：4
|
作者：
Yi, JY [1 ]
Choi, GM [1 ]
机构：
[1] Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 790784, South Korea
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2005年 / 25卷 / 12期
关键词：
electrical conductivity; fuel cells; perovskites; ionic conductivity; LaGaO3;
D O I：
10.1016/j.jeurceramsoc.2005.03.118
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Chemical stability of La0.9Sr0.1Ga0.8Mg0.2O3 (LSGM) as an electrolyte for solid oxide fuel cells (SOFCs) was investigated. At low oxygen-partial pressure (0.003 atm), the LSGM electrolyte partly decomposed due to the development of high overpotentials, and thus the induced reduction atmosphere near cathode. The morphology of LSGM grain near cathode changed due to the formation of new phases. The main decomposition phases were La2O3, La(OH)(3) and LaSrGaO4. The polarization conductance increased due to the microstructural change in LSM and thus the increase in the specific area of the LSM electrode. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2655 / 2659
页数：5
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