Characterization of Perovskite-Type Anode Materials: Sr2-xLaxFeMoO6-δ (x = 0-0.5) for SOFCs

Introduction Among various types of fuel cells, the solid oxide fuel cells (SOFCs) are promising candidate for electrical power generation device in many fields, such as power plants and home electricity–heat cogeneration systems. SOFCs convert chemical energy of a fuel gas directly into electrical energy, with great current density and transformation efficiency (more than 50%). The commonly used anode for SOFCs is Ni-YSZ cermet. However, Ni-YSZ has the disadvantages such as limited three-phase boundary reaction field and different thermal expansion coefficients between Ni and YSZ. Perovskite-type oxides have been studied for electrode of SOFCs from the view point of high catalytic activity. If they are stable under the reduced atmosphere, they will be a good candidate for the anode because of their expected oxide ion conduction and, in consequence, the reaction at the biphasic interface. Tao Wei et.al reported the anodic properties of Sr2NiMoO6-δ for SOFC. In this study, the electrochemical performance of double perovskite-type oxide Sr2-xLaxFeMoO6-δ(x=0-0.5) as an anode for SOFCs was studied.