▎ 摘　　要

NOVELTY - A graphite oxide is dispersed in deionized water, ammonia is added, and centrifuged to obtain graphene oxide colloidal solution. Sulfuric acid and nitric acid are mixed to obtain acid mixture. The carbon nanotube is dispersed in acid mixture, and washed with deionized water to obtain carbon nanotube-dispersed colloidal solution. The graphene oxide colloidal solution and carbon nanotube-dispersed colloidal solution are mixed, alcohol-based solvent is added, and obtained hybrid mixture is irradiated, to obtain graphite-carbon nanotube hybrid material. USE - Preparation of graphite-carbon nanotube hybrid material used for electrode material for supercapacitor. ADVANTAGE - The method economically and environmentally-friendly provides graphite-carbon nanotube hybrid material having large specific surface area, and excellent charge transmission, by a simple process. The supercapacitor containing the graphite-carbon nanotube hybrid material has high performance. DETAILED DESCRIPTION - A graphite oxide is dispersed in deionized water, aqueous ammonia is added to adjust the pH of the solution to 9-11, stirred at room temperature for 48-72 minutes, centrifuged at low speed, and graphite oxide is removed, to obtain graphene oxide colloidal solution. Sulfuric acid (98%) and nitric acid (60-70%), are mixed to obtain acid mixture. The acid mixture is added to carbon nanotube, stirred mechanically at 60 degrees C for 24-72 hours and ultrasonic-treatment is carried out for 4-6 hours. The resulting material is washed repeatedly with deionized water till the mixture is neutral, and dispersed to obtain carbon nanotube-dispersed colloidal solution. The graphene oxide colloidal solution and carbon nanotube-dispersed colloidal solution are mixed and stirred for 2-12 hours. The alcohol-based solvent is added to the resulting mixture, and oxidized to obtain graphene oxide-carbon nanotube hybrid material mixture. The resulting mixture is irradiated in high energy under protection of inert gas using high energy radiation source, to obtain graphite-carbon nanotube hybrid material having hierarchical structure.