▎ 摘　　要

NOVELTY - Liquid acrylonitrile oligomer solution is stirred at 80-300 degrees C for 8-72 hours, heated at 200-300 degrees C for 10 hours, to obtain polyacrylonitrile oligomer. Polyacrylonitrile oligomer and graphite are added to solvent and mixed uniformly, to obtain polyacrylonitrile oligomer-coated graphite compound. Obtained compound is dried at 180-250 degrees C for 10 hours and resultant material is calcined at 1000-3000 degrees C for 1-10 hours at gas flow rate of 0-500 mL/minute in inert atmosphere protection, to obtain graphene-coated graphite composite material. USE - Preparation of graphene-coated graphite composite material (claimed) used for anode of lithium-ion battery. ADVANTAGE - The method enables efficient preparation of graphene-coated graphite composite material having excellent electrochemical performance.