▎ 摘　　要

NOVELTY - Preparing current collector comprises providing an organic carbon source solution, providing the organic carbon source solution to the surface of the current collector substrate, thermally treating the organic carbon source solution to form a carbon source film layer, using a laser source to etch the carbon source film layer as a graphene layer, and preparing a current collector containing the graphene layer. USE - The current collector is useful in electrode pole piece of battery monomer. The battery monomer is useful in battery of electric device (all claimed). ADVANTAGE - The current collector improves the energy density of the battery monomer and conductivity of the current collector, and improves the multiplying power performance of the batteries monomer. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: current collector; preparing electrode pole piece; and an electrode pole piece. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart of the method for preparing current collector (Drawing includes non-English language text).