▎ 摘　　要

NOVELTY - Preparation of water-soluble polyaniline composite electrode material involves dissolving polyacrylic acid and ammonium persulfate in 100 ml hydrochloric acid with concentration of 1 M at 0-5 degrees C, adding 1 ml aniline, continuously stirring at below 5 degrees C for 5-7 hours, stirring at room temperature for more than 24 hours, dialyzing using 0.1 M hydrochloric acid to obtain polyacrylic acid/polyaniline copolymer, dissolving ammonium persulfate in 100 ml 1 M aqueous hydrochloric acid solution, adding aniline, stirring at 5 degrees C for 2-3 hours, storing in airtight flask at room temperature for 12 hours, filtering, washing with methanol and 0.1 M hydrochloric acid, drying at 60-80 degrees C to obtain polyaniline nanoparticles, adding polyaniline nanoparticles to polyacrylic acid/polyaniline copolymer, ultrasonically processing for 1-3 hours, adding nitrogen-doped graphene and ultrasonically processing for 1-3 hours. USE - The method is useful for preparation of water-soluble polyaniline composite electrode material, which is useful for preparation of flexible supercapacitor electrode (claimed). ADVANTAGE - The method enables preparation of water-soluble polyaniline composite electrode material with high yield and excellent conductivity, electrochemical performance and capacitance performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of flexible supercapacitor electrode, which involves using flexible carbon fiber cloth as base, ultrasonically washing with acetone, alcohol and distilled water, immersing in 3-6 %mass potassium permanganate aqueous solution for 0.5-1 hour, washing with alcohol and distilled water and drying.