Abstract (La0.8Sr0.2)0.98Fe0.98Cu0.02O3-? can be sintered directly onto YSZ (without the need for a protective ceria interlayer to prevent inter-diffusion). Though subject to an extended “burn-in” period (~200 hours), anode-supported YSZ cells utilizing the Cu-doped LSF achieve power densities ranging from 1.3-1.7 W/cm2 at 750ºC and 0.7V. These cells have also demonstrated 500 hours of stable performance. The results are somewhat surprising given that XRD indicates an interaction between (La0.8Sr0.2)0.98Fe0.98Cu0.02O3-? 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 pre-calcination temperatures.
Revised: June 15, 2011 |
Published: August 1, 2004
Citation
Simner S.P., M.D. Anderson, and J.W. Stevenson. 2004.La(Sr)FeO3 SOFC Cathodes with Marginal Copper Doping.Journal of the American Ceramic Society 87, no. 8:1471-1476.PNNL-SA-41287.