▎ 摘　　要

NOVELTY - Preparation of composite material involves adding three-dimensional porous polyaniline to prepared graphene solution, adding potassium permanganate and manganese sulfate solution to above mixture, stirring mixture to obtain mixed solution, adding sodium hydroxide solution to mixed solution, heating stirred mixture, washing obtained product using deionized water. The mass ratio of three-dimensional porous polyaniline to graphene oxide is 0.1-4: 1. The weight ratio of manganese sulfate solution and potassium permanganate is 9:1. USE - Preparation of composite material used for supercapacitor electrode material. ADVANTAGE - The method is simple, environmentally-friendly and reliable. The composite material has regular space structure, high energy density and power density, and excellent cycle performance. The three-dimensional porous polyaniline prevents agglomeration of graphene. DETAILED DESCRIPTION - Preparation of composite material involves (a) dissolving oxidized graphene in deionized water, carrying out ultrasonic treatment of dissolved solution for 10 minutes to obtain graphene solution, (b) adding three-dimensional porous polyaniline to graphene solution, adding potassium permanganate and manganese sulfate solution, stirring mixture for 8 hours to obtain mixed solution, (b) adding sodium hydroxide solution to mixed solution, stirring mixture for 5 minutes, transferring mixture to high-pressure autoclave, heating mixture at 185 degrees C for 4 hours, cooling obtained material to room temperature, washing obtained product using deionized water. The mass ratio of three-dimensional porous polyaniline to graphene oxide is 0.1-4: 1. The weight ratio of manganese sulfate solution and potassium permanganate is 9:1. The weight ratio of manganese sulfate solution and sodium hydroxide solution is 3:5. The mass ratio of manganese oxide to graphene oxide is 0.05-0.5:1.