Modification of Composite Structure on Cobalt Free Cathode for Solid Oxide Fuel Cells

Abstract

A novel cobalt-free cathode of composite Sm0.5Sr0.15Ba0.35Fe3-δ for IT-SOFCs is developed using the solidstate reaction technique. Thermal gravimetric was carried out for monitoring the weight loss on the cathode system. In contrast, the X-ray diffraction was employed for the structure phase constructed on the model. Reduction of weight value during the calcination process was achieved to be 10.5%. Thus, a low temperature of the reduction reaction was obtained less than 920 °С. The decomposition reaction related to oxygen vacancy in the composite cathode-free cathode was begun at 410 °С. It takes the advantage in the device system for IT-SOFCs in application. The established structure of the composite cathode system was in the perovskite