▎ 摘　　要

NOVELTY - The graphene comprises a current collector and a cathode slurry layer, where the cathode slurry layer is located at one side of the current collector. The other side of current collector is covered with graphene film. The current collector is provided with a through hole. The surface of graphene film is provided with a convex point. The convex point is located in through hole. The inner wall of convex point and through hole are attached. USE - Used as copper foil graphene. ADVANTAGE - The graphene: solves the problem of forming dead lithium on back surface of current collector; has excellent conductivity and thermal conductivity; is excellent for improving performance of battery; also has easier lithium-ion barrier; and avoids the condition that the lithium-ion passes through the through-hole and is deposited on back surface of current collector, so as to reduce the reduction of battery capacity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a preparation method of copper foil graphene. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic structural diagram of the section of graphene copper foil electrode where the current collector is a section view structure.