▎ 摘　　要

NOVELTY - The method (100) involves freezing and drying (108) the graphene oxide slurry to form a porous graphene oxide film, using the light beam and the microwave to irradiate the porous graphene oxide film to form a porous reducing graphene oxide film. The graphene oxide is comprised of one or more layers of porous graphene oxide films. Each layer of the porous graphene oxide film is comprised of multi-layer porous graphene oxide sheet. An oxygen functional group is located between the graphene oxide sheets. USE - Method for preparing porous graphene film used in reduction-oxidation graphene electrode, capacitor e.g. supercapacitor (all claimed), battery and fuel cell. ADVANTAGE - The method enables reducing porous graphene oxide film by laser and microwave irradiation so as to realize effective large area reduction, thus realizing high performance of the super capacitor. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the process for preparing porous graphene film. (Drawing includes non-English language text) Step for preparing porous graphene film (100) Step for oxidizing graphite to produce graphite oxide (104) Step for exfoliating resulting oxidized graphite to form graphene oxide slurry (106) Step for freezing and drying the graphene oxide slurry to form a porous graphene oxide film, using the light beam and the microwave to irradiate the porous graphene oxide film to form a porous reducing graphene oxide film (108) Step for compressing porous graphene oxide film (110)