▎ 摘　　要

NOVELTY - A graphene-based supercapacitor electrode material preparing method involves dispersing graphene oxide and surfactant in deionized water to obtain an oxidized graphene solution and surfactant solution. Carbon nanotube, activated carbon and surfactant solution is added into graphene solution. The mixed solution is dispersed in a ball mill to wet-mill by adding nitrogen-containing compound and the washing is repeated after the reaction is finished, and freeze-drying is carried out. Freeze-dried mixture is carried out under heat treatment. USE - Method for preparing graphene-based supercapacitor electrode material. ADVANTAGE - The method enables preparing with high capacity, excellent electrochemical energy performance, high yield and better circulation stability, in simple manner. DETAILED DESCRIPTION - A graphene-based supercapacitor electrode material preparing method involves dispersing graphene oxide and surfactant in deionized water to obtain an oxidized graphene solution in a concentration of 2-5 mg/mL and surfactant solution in a concentration of 1.5-5 mg/mL. Carbon nanotube and activated carbon and surfactant solution is added into graphene solution, where the mass ratio of the oxidized graphene to the carbon nanotube is 3-4:1, the mass ratio of the activated carbon to the graphene oxide is 1:2-4. The mixed solution is dispersed in a ball mill to wet-mill by adding nitrogen-containing compound at 110-180 degrees C for 6-16 hours and the washing is repeated after the reaction is finished, and freeze-drying is carried out, the mass ratio of the nitrogen-containing compound and graphene oxide is 1.34-1.66:1. The freeze-dried mixture is carried out under heat treatment at 450-600 degrees C for 2-4 hours to obtain a three-dimensional aza-graphene-based material.