▎ 摘　　要

NOVELTY - A composite electrode material preparation method involves carrying out in situ polymerization of polyaniline/sulfonated graphene composites and preparing polyaniline-sulfonated graphene composites by adding aniline monomer to dispersed product, in presence of homogeneous solution, ultrasonically dispersing, stirring at constant speed in ice bath, adding aqueous ammonium persulfate solution in dropwise, terminating addition in 0.5-1 hour, reacting in ice bath for 4-6 hours and drying to obtain composite material followed by preparing composite electrode. USE - Method for preparing composite electrode material that is utilized for supercapacitor. ADVANTAGE - The method enables preparing composite electrode material with excellent magnification performance, better cycle stability and high specific capacitance. DETAILED DESCRIPTION - A composite electrode material preparation method involves carrying out in situ polymerization of polyaniline/sulfonated graphene composites by uniformly dispersing sulfonated graphene in deionized water, preparing polyaniline-sulfonated graphene composites by adding aniline monomer to the dispersed product, in presence of homogeneous solution, ultrasonically dispersing, stirring at constant speed in ice bath, adding aqueous ammonium persulfate solution in dropwise, terminating addition in 0.5-1 hour, reacting in ice bath for 4-6 hours and drying to obtain composite material and preparing composite electrode by dissolving polyvinylidene fluoride in N-methyl pyrrolidone to prepare 50-100 mg/ml solution, measuring corresponding substances according to ratio of polyaniline-sulfonated graphene composites: acetylene black: polyvinylidene fluoride (80:(10-15):(10-5)), uniformly grinding and drying to obtain polyaniline-sulfonated graphene composite electrode material.