▎ 摘　　要

NOVELTY - Preparing modified graphene composite graphite anode material comprises (1) adding silane coupling agent and graphene material, mixing in a ratio of 0.01-0.2:1 in a solvent N-methylpyrrolidone to obtain a mixture A, (2) maintaining mixture A at a temperature of 20-90 degrees C, stirring for 1-2 hours and filtering to obtain a mixture B, (3) centrifugally separating the mixture B to obtain a modified graphene material, (4) mixing the modified graphene material and the graphite anode material according to a ratio of 1:4-30, adding a solvent to prepare a mixed solution containing 5-25% solid, (5) centrifuging the mixed solution containing 5-25% solid, drying solid to obtain a modified graphene composite graphite anode material. USE - The method is useful for preparing modified graphene composite graphite anode material. ADVANTAGE - The material has better conductivity and mechanical strength and prolong the service life of the battery.