▎ 摘　　要

NOVELTY - The collector has a metal foil material whose surface is provided with a convex structure and a high-molecular film layer. The surface of the metal foil is covered with a high molecular film layer covering a portion of the surface. The high molecular membrane layer is formed with a chain network structure. The metal foil materials are made of metal foil. The convex structure comprises graphitized carbon, the first metal, the second metal, organic polymer, and hybrid organic polymer. The polymer film layer has a porous structure. USE - Current collector for electrode sheet used secondary battery e.g. lithium ion battery used in electric device (all claimed). ADVANTAGE - The Current collector realizes the reduction of the thickness of the current collector on the basis of ensuring the mechanical performance of the ultra-thin current collector that satisfies the electric core production process requirement, so as to reduce the mass ratio of the current collector in the electric core structure, thus improving the endurance performance of the battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a preparation method for the current collector; (2) an electrode sheet; (3) a secondary battery; (4) an electric device. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the current collector. 10Convex structure 20Chain network structure 100Current collector