▎ 摘　　要

NOVELTY - Preparing super-thick thermally conductive graphene film comprises (a) adding chitosan into graphene oxide aqueous slurry to obtain modified graphene oxide slurry, (b) punching conical bump on the substrate, and assembling the modified graphene oxide slurry on the substrate to obtain graphene oxide film with spines, (c) laminating and pressurizing the multiple layers of graphene oxide film to form an ultra-thick graphene oxide sheet and heating for thermal reduction treatment, and (d) heating and graphitizing the graphene sheet after thermal reduction in a protective atmosphere to obtain final product. USE - The graphene film is useful for heat dissipation design of high-power electronic equipment. ADVANTAGE - The graphene film has thickness of more than 500 mu m and thermal conductivity can reach 1146 W/mK.