▎ 摘　　要

NOVELTY - A lithium ion battery carbon-coated graphene composite anode material is prepared by taking tea slag, drying at 20-25oC, crushing, sieving into 40-80 mesh, obtaining solid material, taking graphene oxide or graphene, dispersing in 0.1-1 M sulfuric acid, adding solid material, stirring at 0-5 degrees C for 4-6 hours, drying, grinding, pumping protective gas comprising argon, nitrogen, helium or hydrogen, carrying out high temperature heat reduction and carbonizing reaction at 250-950oC for 0.2-20 hours, and cooling. USE - Method for preparing lithium ion battery carbon-coated graphene composite anode material (claimed). ADVANTAGE - The material has high magnification rate and long service life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for application of lithium ion battery carbon-coated graphene composite anode material comprising coating with graphene polyvinylidene fluoride and carbon black, adding Super-P polyvinylidene fluoride, stirring, coating film on copper foil surface, drying, and punching.