▎ 摘　　要

NOVELTY - Graphene supercapacitor electrode material comprises graphene structure which is a foamed three-dimensional structure. USE - Graphene supercapacitor electrode material. ADVANTAGE - The graphene supercapacitor electrode material is prepared in simple and eco-friendly manner, and suitable for batch production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene supercapacitor electrode material, which involves: (A) stripping graphite by Hummers method to obtain pure oxide graphene-ethanol dispersion; (B) cleaning foamed magnesium and performing ultrasonic dispersion to obtain foamed magnesium oxide on which the graphene oxide is deposited; (C) putting the sample in the vacuum quartz tube for direct thermal reduction to obtain the graphene/foam magnesium composite material; and (D) immersing the sample in etchant and drying.