▎ 摘　　要

NOVELTY - Preparation of graphene film comprises adding graphite oxide to organic solvent, ultrasonic treating for 0.5-1 hour, adding dispersant comprising fluorine-containing sulfonated polyaryl ether ketone solution or fluorine-containing sulfonated polyaryl ether sulfone solution, ultrasonic treating for 0.5-1 hour to obtain graphene oxide suspension, adding hydrazine hydrate, reacting at 100 degrees C for 12-24 hours, filtering using microporous membrane vacuum filtration, drying cake at 40-60 degrees C, peeling off membrane and heat treating crude product in oven at 150-250 degrees C for 0.5-2 hours. USE - Method for preparing graphene film used as super capacitor and current collector of lithium-ion battery (all claimed). ADVANTAGE - The method is simple and easy to control. The graphene film with 1-10 mu m thickness is light, uniform, and strongly conductive.