▎ 摘　　要

NOVELTY - The lithium-air cell catalyst comprises perovskite lanthanum strontium cobalt oxide (LSCO) particles with a graphene composite, where the lanthanum strontium cobalt oxide particles have lanthanum strontium cobalt oxide nanoparticles with a diameter of 15-30 nm. The nanoparticles are adsorbed on surface of graphene. USE - Lithium-air cell catalyst. ADVANTAGE - The lithium-air cell catalyst ensures good catalytic performance, very high capacitance, and cane be manufactured in a simple, cost-effective and environment-friendly manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing lithium-air cell catalyst, which involves: (A) dispersing 40 mg graphite oxide in 40 ml deionized water with stirring for 1 hour to obtain a homogeneous graphene oxide solution; (B) dissolving lanthanum compound, strontium compound and a cobalt compound in deionized water uniformly to prepare an aqueous solution; (C) adding the formed aqueous solution in the obtained homogeneous graphene oxide solution with stirring to obtain a solution in a reaction vessel; (D) heating the formed solution at 140-200 degrees C for 5-20 hours to obtain a precipitate; (E) filtering and washing the formed precipitate with deionized water; (F) drying the washed precipitate; (G) adding hydrazine hydrate to perform hydrothermal reaction at 100-150 degrees C for 1-5 hours; (H) cooling the mixture at room temperature to give another precipitate; (I) washing the formed precipitate repeatedly with deionized water and ethanol; and (J) drying at 400-700 degrees C under inert atmosphere for 2-20 hours to get the finished product.