Conductivity of SrCrO4 and Its Influence on Deterioration of Electrochemical Performance of Cathodes in Solid Oxide Fuel Cells

SrCrO4 crystallizes in monoclinic space group P21/n and under static air exhibits a low total conductivity (1.8 x 10-4 Ohm-1 x cm-1 at 800 oC). Composites fabricated from La0.58Sr0.4Co0.2Fe0.8O3 perovskite and SrCrO4 remain two phases after heating at 900 oC for a short period of time. Model experim...

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Bibliographic Details
Published in:ECS transactions 2014, Vol.59 (1), p.327-332
Main Authors: Liu, Wei, Konysheva, Elena Yu
Format: Article
Language:English
Online Access:Get full text
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Summary:SrCrO4 crystallizes in monoclinic space group P21/n and under static air exhibits a low total conductivity (1.8 x 10-4 Ohm-1 x cm-1 at 800 oC). Composites fabricated from La0.58Sr0.4Co0.2Fe0.8O3 perovskite and SrCrO4 remain two phases after heating at 900 oC for a short period of time. Model experiments were carried out to identify an influence of current load on the stability of SrCrO4 surface layer and redistribution of chromium between the surface and volume of cathode, thereby giving insight in to the mechanism of Cr-poisoning of Co-containing perovskite cathodes.
ISSN:1938-5862
1938-6737
DOI:10.1149/05901.0327ecst