▎ 摘　　要

NOVELTY - A graphene-cobaltous stannate-cobaltosic oxide composite cathode material preparation method involves dissolving cobaltosic oxide/graphene composite material in solution containing tin nitrate, cobaltous hydroxide and deionized water to obtain composite material suspension. Hexadecyl trimethyl ammonium bromide surfactant, ethylene glycol and deionized water are mixed to obtain mixed solution. The suspension is added to the mixed solution and stirred to obtain a precipitate. The precipitate is washed and processed in a reactor to obtain a dried precursor followed by sintering. USE - Method for preparing graphene-cobaltous stannate-cobaltosic oxide composite cathode material that is utilized in a lithium ion battery. ADVANTAGE - The cathode material is stable in structure, and provides high capacity, electricity conductivity and circulation stability to the lithium ion battery. DETAILED DESCRIPTION - A graphene-cobaltous stannate-cobaltosic oxide composite cathode material preparation method involves preparing a cobaltosic oxide/graphene composite material and dissolving composite material in a solution containing tin nitrate, cobaltous hydroxide and deionized water to obtain composite material suspension. Hexadecyl trimethyl ammonium bromide surfactant, ethylene glycol and deionized water are mixed to obtain a mixed solution. The composite material suspension is added to the mixed solution and uniformly stirred to obtain a precipitate. The precipitate is washed using deionized water and absolute ethyl alcohol in a centrifugalizing mode, and the washed precipitate is processed in a stainless steel reactor to obtain a dried precursor. The precursor is sintered at 800-850 degrees C for 4-6 hours to obtain the composite cathode material.