▎ 摘　　要

NOVELTY - Preparation of nitrogen-graphene-doped composite graphite negative electrode material involves (s1) adding nitrogen source and graphene into an organic solvent, and uniformly mixing to obtain a mixed solution (A), (s2) adding the mixed solution (A) and graphite into a mixing device, and uniformly dispersing to obtain a mixed solution (B), (s3) placing in heat treatment equipment for heat treatment or placing in carbonization equipment for direct carbonization to obtain a treated material, (s4) loading the treated material (C) into graphite equipment, and carrying out graphitization treatment in a graphitization furnace to obtain a graphitized material (D), and (s5) screening. USE - Preparation of nitrogen-graphene-doped composite graphite negative electrode material (claimed). ADVANTAGE - The method solves the defects of graphene such as low initial efficiency and low tap density by combining the nitrogen source with graphene, utilizes the advantages of graphene high electrical conductivity and high mechanical strength. The doping method of the elements effectively improve the rate performance and cycle stability of the negative electrode material, solve the problems of low ionic conductivity and high resistance of nitrogen-doped graphite of existing method and improves the rate performance and cycle stability of the negative electrode material.