A Highly Conductive Oxide Anode for Solid Oxide Fuel Cells

Abstract

Ceramic anodes comprising infiltrated in porous ytttria-stabilized zirconia were investigated. Upon reduction at , the electronically insulating phase transformed to , which has a bulk electronic conductivity of under fuel cell conditions. An anode conductivity of was achieved with a low loading of of the total anode. The infiltrated composite is dimensionally stable upon redox cycling, and a Pd catalyst was required to achieve good fuel cell performance. Fuel cell performance with methane was lower than with hydrogen. This lower methane performance could be due to coking.