La(Sr)FeO(3) SOFC Cathodes with Marginal Copper Doping

(La0.8Sr0.2)0.98Fe0.98Cu0.02O3-d can be sintered directly onto YSZ (without the need for a protective ceria interlayer). Though subject to an extended "burn-in" period (200 h), anode-supported YSZ cells using the Cu-doped LSF achieve power densities ranging from 1.3 to 1.7 W/cm2 at 750 deg...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2004-08, Vol.87 (8), p.1471-1476
Main Authors: Simner, Steven P, Anderson, Michael D, Stevenson, Jeffry W
Format: Article
Language:English
Subjects:
Ceramics
Copper
Materials science
Online Access:Get full text
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Summary:(La0.8Sr0.2)0.98Fe0.98Cu0.02O3-d can be sintered directly onto YSZ (without the need for a protective ceria interlayer). Though subject to an extended "burn-in" period (200 h), anode-supported YSZ cells using the Cu-doped LSF achieve power densities ranging from 1.3 to 1.7 W/cm2 at 750 degrees C and 0.7 V. These cells have also demonstrated 500 h of stable performance. The results are somewhat surprising given that XRD indicates an interaction between (La0.8Sr0.2)0.98Fe0.98-Cu0.02O3-d and YSZ resulting in the formation of strontium zirconate and/or monoclinic zirconia. The amount and type of reaction product was found to be dependent on cathode and electrolyte powder precalcination temperatures. [PUBLICATION ABSTRACT]
ISSN:0002-7820
1551-2916