▎ 摘　　要

NOVELTY - Preparing hard carbon/graphene composite anode material comprises e.g. placing source of organic carbon in corundum, placing crucible in a tube resistance furnace under inert gas atmosphere, stabilizing organic carbon source for a certain period of time and carrying out dehydration reaction between molecules, adding sheet layered graphene treated, organic carbon source into organic solvent, stirring, dispersing, adding mixed solution of sodium meta aluminate and sodium hydroxide, aging, adding polytetrafluoroethylene as substrate into high temperature reaction kettle and then ultrasonicating. USE - The material is useful for lithium battery (claimed). ADVANTAGE - The material has large electrode capacity and excellent stability. DETAILED DESCRIPTION - Preparing hard carbon/graphene composite anode material comprises (i) placing source of organic carbon in corundum, placing crucible in a tube resistance furnace under inert gas atmosphere, stabilizing organic carbon source for a certain period of time and carrying out dehydration reaction between molecules, (ii) adding sheet layered graphene treated in step (i), organic carbon source into organic solvent, stirring, dispersing, adding mixed solution of sodium meta aluminate and sodium hydroxide, aging for 1-2 hours at room temperature, adding polytetrafluoroethylene as substrate into high temperature reaction kettle, ultrasonicating for a certain time, raising temperature to room temperature, preserving heat for a certain time, swelling, filtering organic carbon source and drying using methanol solution to obtain graphene/hard carbon precursor, and (iii) mixing precursor obtained in step (ii) with nano-spherical metal powder in a V-type mixer, adding into corundum under gas atmosphere, heating tube furnace at high temperature, carrying out thermal decomposition of hard carbon precursors, forming spherical hard carbon on the surface of nano-metal powder and then sandwiching between layered graphene to obtain final product.