La(Sr)FeO3 SOFC Cathodes with Marginal Copper Doping

Journal Article · Sun Aug 01 04:00:00 EDT 2004 · Journal of the American Ceramic Society (Online)

DOI:https://doi.org/10.1111/j.1551-2916.2004.01471.x· OSTI ID:15020870

Simner, Steve P. ^[1]; Anderson, Michael D. ^[1]; Stevenson, Jeffry W. ^[1]

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1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Abstract (La_0.8Sr_0.2)_0.98Fe_0.98Cu_0.02O_3-δ 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 (La_0.8Sr_0.2)_0.98Fe_0.98Cu_0.02O_3-δ 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.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 15020870
• Report Number(s): PNNL-SA--41287; AA2530000
• Journal Information: Journal of the American Ceramic Society (Online), Journal Name: Journal of the American Ceramic Society (Online) Journal Issue: 8 Vol. 87; ISSN 1551-2916
• Publisher: American Ceramic Society
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
CATHODES
COPPER
ELECTROLYTES
LSFCu-YSZ
Cu doping
SOFC cathodes
PERFORMANCE
SOLID OXIDE FUEL CELLS
STRONTIUM
X-RAY DIFFRACTION
ZIRCONATES
yttria-stabilized zirconia