▎ 摘　　要

NOVELTY - Preparing modified three dimensional graphene foam involves adding cyclohexane solution and polystyrene solution to 5-14 mg/mL solution of graphene oxide with stirring at 3000-6000 revolutions/minute followed by addition of sodium dodecyl sulfate and stirring is continued for 5-20 minutes to obtain a uniform mixed solution. The mixed solution is frozen in liquid nitrogen to obtain polystyrene modified graphene hydrogel which is lyophilized to obtain a polyphenylene ethylene-modified three-dimensional graphene airgel. USE - Method for preparing modified three dimensional graphene foam (claimed). ADVANTAGE - The method enables to prepare polyphenylene modified three-dimensional graphene foam in a simple and easy manner suitable for large-scale production. The product has a honeycomb shape structure with excellent electrochemical property. DETAILED DESCRIPTION - Preparing modified three dimensional graphene foam involves adding cyclohexane solution and polystyrene solution to 5-14 mg/mL solution of graphene oxide with stirring at 3000-6000 revolutions/minute followed by addition of sodium dodecyl sulfate and stirring is continued for 5-20 minutes to obtain a uniform mixed solution. The mixed solution is frozen in liquid nitrogen to obtain polystyrene modified graphene hydrogel which is lyophilized to obtain a polyphenylene ethylene-modified three-dimensional graphene airgel which under protective atmosphere of argon gas is annealed at 200 degrees C for 1-2 hours to obtain polyphenylene modified three-dimensional graphene foam.