Stability and reactivity of LSGM electrolytes with nickel-based ceramic cathodes

被引：17

作者：

Munnings, C. N.

Skinner, S. J.

Amow, G.

Whitfield, P. S.

Davidson, I. J.

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England

[2] Natl Res Council Canada, ICPET, Ottawa, ON K1A 0R6, Canada

来源：

JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY | 2005年 / 2卷 / 01期

关键词：

D O I：

10.1115/1.1842780

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The surface of La0.9Sr0.1Ga0.8Mg0.2O3-delta (LSGM 9182) has been examined through the use of secondary-ion mass spectrometry before and after surface modification by mechanical polishing. It was found that the cation stoichiometry varied at the surface in both cases. The effect of this change on the performance of the cathode material La2NiO4+delta was assessed through ac impedance spectroscopy of symmetrical cells prepared by depositing La2NiO4+delta on the surface of pellets of La0.9Sr0.1Ga0.8Mg0.2O3-delta. An improvement in the cathode performance of these cells at temperatures above 500 degrees C was found on electrolytes with elevated levels of strontium and magnesium at the surface.

引用

页码：34 / 37

页数：4

共 15 条

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