Surface Modification of a Doped BaCeO3 to Function as an Electrolyte and as an Anode for SOFCs
نویسندگان
چکیده
Dual functions of BaCe0.8Y0.2O3−a ~BCY! as an electrolyte and as an anode were improved for solid oxide fuel cell ~SOFC! applications. A porous Ce-rich phase with fluorite structure was formed with a depth of ,10 mm from the BCY surface by vaporization of BaO from the BCY surface at 1700°C. The resulting BCY surface showed enough electronic conductivity to provide electrical collection and a high electrocatalytic activity for hydrogen oxidation. A hydrogen-air fuel cell with the BCY electrolyte exhibited reasonable performances without using an anode material between 750 and 950°C. © 2005 The Electrochemical Society. @DOI: 10.1149/1.1928230# All rights reserved.
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