▎ 摘　　要

NOVELTY - Preparing carbon nanotube/graphene composite involves (a) adding graphene oxide slurry, surfactant, and carbon nanotube slurry to reactor, and stirring mixture to obtain mixed slurry, (b) drying mixed slurry, and pulverizing dried slurry, and (c) preparing carbon nanotube/graphene composite material by (i) heating composite powder, adding pulverized particles, and carrying out reduction treatment to obtain powdery carbon nanotube/graphene composite, and (ii) adding solvent to composite powder, and subjecting powder to ultrasonic vibration to obtain composite. USE - The method is useful for preparing carbon nanotube/graphene composite (claimed) which is useful as supercapacitor electrode material. ADVANTAGE - The method is simple to perform, and suitable for large scale production of composite material, and consumes less energy. DETAILED DESCRIPTION - Preparing carbon nanotube/graphene composite involves (a) adding graphene oxide slurry having solid content of less than or equal to 50% into a single layer glass reactor, adding surfactant to the reactor, stirring the mixture for 25-35 minutes, adding carbon nanotube slurry having solid content of less than or equal to 50% to the reactor, and stirring the mixture for 25-35 minutes to obtain mixed slurry, (b) drying the mixed slurry by placing the slurry in an oven at 90-110 degrees C until moisture content reaches not greater than 5%, and pulverizing the dried slurry using a pulverizer to a particle size of less than or equal to 74 mu m, and (c) preparing carbon nanotube/graphene composite material by (i) taking carbon nanotube/graphene composite powder, heating the powder using muffle furnace, raising the temperature of the furnace to 200-450 degrees C, adding the pulverized particles into the furnace, blowing air into the furnace, carrying out reduction treatment of the pulverized particles for 3-10 minutes, removing the particles after the reduction treatment, and cooling the particles to room temperature to obtain powdery carbon nanotube/graphene composite, and (ii) adding solvent to the carbon nanotube/graphene composite powder, and subjecting the powder to ultrasonic vibration for 8-12 minutes to obtain carbon nanotube/graphene composite having solid content of less than or equal to 50%, where the solvent is an aqueous solvent or oil solvent.