▎ 摘　　要

NOVELTY - The method involves preparing oxidation graphene dispersion liquid. The graphene dispersion liquid is added with calcium chloride and glucose and stirred to completely dissolve. Carbon-di-oxide gas is introduced into the graphene dispersion liquid. A carbon film coating is annealed to obtain a reducing graphene-calcium carbon composite thin film to obtain a hydrochloric acid, and remove calcium carbon particle. A carbon film is used for performing three-dimensional porous graphene thin film hydro-thermal reaction to obtain a composite thin film. USE - Porous graphene-manganese-di oxide composite thin film preparation method. ADVANTAGE - The method enables improving stability of a super capacitor electrode material. DESCRIPTION OF DRAWING(S) - The drawing shows a photographic view of a composite film.