▎ 摘　　要

NOVELTY - Preparation of a graphene film involves extracting graphite powder and graphite as raw material using hydrogen peroxide to obtain graphene oxide solution, centrifugally filtering the obtained solution, coating the solution on a metallic substrate, drying and solidifying the film, performing laser engraving reduction on the formed film, subjecting the film to high-temperature calcination, and separating the film from the substrate. USE - Preparation of graphene film for forming graphene super capacitor (claimed). ADVANTAGE - The method produces graphene film with high yield and low energy consumption. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of graphene super capacitor, which involves encapsulating the graphene film electrode, pouring electrolyte solution, and drying.