Liquid-Solid Reaction Method to Synthesize La_(0.7)Sr_(0.3)MnO3 Powder as Cathode for Solid Oxide Fuel Cell

摘要

La_(0.7)Sr_(0.3)MnO3 powders were prepared by liquid-solid reaction method using humidified (3 % H2O) hydrogen as fuel and ambient air as oxidant. These powders were evaluated in terms of phase structure, morphology and fuel cell performances. An electrolyte-supported solid oxide fuel cell was prepared in a conventional manner. The results showed that the formation of La_(0.7)Sr_(0.3)MnO3 perovskite phase was acquired at 1100 °C for 5 h. The particles of the powders were uniform and were about 0.1-0.3 μm. At 750 °C. the maximum power density of a single cell with La_(0.7)Sr_(0.3)MnO3 powder were 135 mW cm~(-2).