▎ 摘　　要

NOVELTY - Preparation of electrode material involves ultrasonically dispersing oxidized graphene nano belts in water, obtaining an oxidized graphene nano belts dispersion, adding an aniline batch (a1), stirring, adding an initiator, stirring, reacting, obtaining a mixed dispersion of intermediate product, adding manganese dioxide nanoparticles to the obtained product, dispersing for 5-60 minutes, obtaining a mixed solution of manganese dioxide nanoparticles/intermediate product, adding an aniline batch (a2), mixing, reacting, filtering, washing with ethanol and deionized water, and drying. USE - Preparation of electrode material used for supercapacitor. ADVANTAGE - The electrode material provides supercapacitor having excellent capacitance, cycle characteristics and service life. DETAILED DESCRIPTION - Preparation of electrode material involves ultrasonically dispersing oxidized graphene nano belts in water, obtaining an oxidized graphene nano belts dispersion with concentration of 0.1-10 mg/mL, adding an aniline batch (a1) in a mass ratio of aniline and oxidized graphene nano belts of 0.1-20:1, stirring for 5-30 minutes, then adding an initiator in a mass ratio of initiator and oxidized graphene nano belts of 0.1-25:1, stirring at -10 degrees C to 5 degrees C, reacting for 5-60 minutes, obtaining a mixed dispersion of intermediate product, adding manganese dioxide nanoparticles to the obtained product in a mass ratio of manganese dioxide nanoparticles and oxidized graphene nano belts of 0.1-15:1, dispersing for 5-60 minutes, obtaining a mixed solution of manganese dioxide nanoparticles/intermediate product, adding an aniline batch (a2) in a mass ratio of aniline and oxidized graphene nano belts of 0.1-20:1, mixing at -10 degrees C to 5 degrees C, reacting for 5-60 minutes, filtering, washing with ethanol and deionized water until the pH value is neutral, and drying at 60-80 degrees C for 24-48 hours.