▎ 摘　　要

NOVELTY - Composite material comprises graphene, nano carbon-based oxide and conductive polymer, the nano carbon-based oxide is adsorbed on the surface of the graphene, the graphene is connected with the conductive polymer through the nano carbon-based oxide, the conductive polymer is nanowire structure. The composite material is surface-point-line three-dimensional structure. USE - The composite material is useful in lithium ion battery (claimed). ADVANTAGE - The composite material: is based on graphene, surface of graphene adsorbs point-shaped nano-carbon-based oxides, the point-shaped nano-carbon-based oxides are used as bridges or cross-linking agents to connect conductive polymer nanofibers and graphene together, and finally form a three-dimensional structure. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the composite material comprising stirring and dispersing the nano carbon-based oxide solution, graphene and conductive polymer precursor to form mixed solution, forming a three-electrode system with mixed solution, cathode, anode and reference electrode; subjecting mixed solution to first electrochemical reaction under first potential; subjecting the mixed solution after first electrochemical reaction to second electrochemical reaction under second potential to obtain a composite material.