▎ 摘　　要

NOVELTY - Preparing flexible self-supporting three-dimensional porous graphene film comprises e.g. dispersing high molecular polymer as template with graphene oxide in solvent uniformly, and vacuum-filtering into film, performing high temperature heat treatment under inert atmosphere to obtain final product, where high molecular polymer is polyvinyl alcohol, polyethylene glycol, polymethyl methacrylate, polystyrene and polyvinylpyrrolidone;, (i) arranging graphene oxide into aqueous solution having concentration of 0.5-10 mg/ml, (ii) dispersing polymer in deionized water at concentration of 5-50 mg/ml, (iii) mixing solution (ii) and (i), stirring and sonicating to disperse polymer and graphene oxide, (iv) vacuum-filtering mixed solution (iii) into film and drying to obtain composite film of graphene oxide and high molecular polymer, and (v) heating graphene oxide and polymer composite film at 400-1000 degrees C under inert gas protection and heat-treating for 2-8 hours. USE - The porous graphene film is useful in flexible supercapacitors, flexible batteries, microelectronics, ion adsorption and membrane separation. ADVANTAGE - The porous graphene film has controllable pore shape, size and porosity, molecular weight and amount of high-molecular polymer template. DETAILED DESCRIPTION - Preparing flexible self-supporting three-dimensional porous graphene film comprises dispersing high molecular polymer as template with graphene oxide in solvent uniformly, and vacuum-filtering into film, performing high temperature heat treatment under inert atmosphere to obtain final product, where high molecular polymer is polyvinyl alcohol, polyethylene glycol, polymethyl methacrylate, polystyrene and polyvinylpyrrolidone; and molecular weight of high molecular polymer is 5,000-100,000, (i) arranging graphene oxide into aqueous solution having concentration of 0.5-10 mg/ml, (ii) dispersing polymer in deionized water at concentration of 5-50 mg/ml, (iii) mixing solution (ii) and (i), stirring and sonicating to disperse polymer and graphene oxide, (iv) vacuum-filtering mixed solution (iii) into film and drying to obtain composite film of graphene oxide and high molecular polymer, and (v) heating graphene oxide and polymer composite film at 400-1000 degrees C under inert gas protection and heat-treating for 2-8 hours. An INDEPENDENT CLAIM is also included for flexible self-supporting three-dimensional porous graphene film obtained by above method, where graphene film has honeycomb three-dimensional network porous structure and excellent flexibility, thickness of the membrane can be controlled in the range of 5-100 mu m, pore size is 2-100 nm, and specific surface area is 300-1600 m2/g.