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A perovskite-type oxide,La0.8Sr0.2MnO3,was synthesized by the organic solvent sol-gel method.The desired metal cations were chelated in a solution by using citric acid as the chelating agent and absolute ethanol as the solvent.The thermal decomposition of the metal earboxylate premasor gels was studied by thermogravimetric/differential thermal analyzer (TG/DTA) and the products derived from calcining the gels were characterized by X-ray diffraction (XRD) and transmission electronic microscope (TEM).The polarization curves were acquired on an electrochemical workstation (LK98) and the discharge curves were acquired on a testing instrument of batteries (DC-5),with a constant current discharge,less than 120 mA/cm2.The results revealed that the nanometer perovskite-type powder with lesser particle size could be achieved with an organic solvent and had a better catalytic activity.