▎ 摘　　要

NOVELTY - Method for preparing graphene composite material, involves (a) crushing the raw materials, adding coating agent and binder to crushed raw materials, uniformly mixing and performing stepwise constant-temperature heat treatment to obtain coarse material, and (b) shaping the coarse material and sieving to obtain the composite material, where the raw material comprises natural graphite microspheres and artificial graphite microspheres, and the graphitization degree of raw material is more than 90%. USE - The composite material is used in lithium battery and negative electrode material of lithium ion battery (all claimed). ADVANTAGE - The method is simple, and the obtained composite material has high-rate, high capacity and high compaction density, and is economical, stable in product quality and suitable for large-scale batch production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a negative electrode material of lithium ion battery comprising carbon material and graphene composite material prepared by above method.