▎ 摘　　要

NOVELTY - Composite electrode comprises polyaniline nanotube/graphene composite material and electric conductive substrate. The composite material comprises polyaniline nanotube array doped graphene. The polyaniline nanotube has diameter of 150-300 nm and tube spacing of 300-400nm. USE - Composite electrode used as supercapacitor electrode material (claimed). ADVANTAGE - The composite electrode has good conductivity and excellent circulation performance and capacitive property. The method is easy to operate and environment-friendly. The supercapacitor has high capacitance and good circulation performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) preparation of composite electrode comprising (i) dispersing graphene oxide in aniline in sulfuric acid solution, soaking anodic aluminum oxide template, vacuumizing, and ultrasonically vibrating; adding dropwise ammonium persulfate solution and heating in water bath at -20 to 20 degrees C for 1-24 hours; and soaking in sodium hydroxide solution, heating to 50-70 degrees C for 10-60 minutes, taking out, washing with deionized water, and drying; (ii) adding with reducing agent and stirring; heating to 80-95 degrees C and stirring for 6-24 hours; and filtering, taking insoluble material, washing, and drying; and (iii) adding with electrically conductive agent, deionized water or N-methylpyrrolidone at mass ratio of 80-90:10-20 and stirring into slurry; controlling viscosity of slurry at 600-7000 cps, applying over electric conductive substrate, drying, rolling, and pressing; and (2) supercapacitor electrode material comprising positive electrode, negative electrode and separator between positive and negative electrodes and electrolyte. The positive and negative electrodes are composite material. The separator is superfine glass fiber membrane or polymer film. The electrolyte is imidazolium chloride-aluminum chloride at molar ratio of 1:1.3-1.5.