▎ 摘　　要

NOVELTY - Preparation of sulfonated graphene oxide/manganese dioxide/polypyrrole composite material involves dissolving 0.5 g graphene oxide in 100 mL deionized water, ultrasonic treating for 30 minutes, adding potassium permanganate and manganese sulfate solution, ultrasonic treating for 5 minutes, reacting at 185 degrees C for 8 hours, cooling, washing with deionized water, neutralizing to obtain graphene/manganese oxide colloid, mixing 2.3 g p-aminobenzenesulfonic acid and 100 mL deionized water, heating, dissolving, adding 0.94 g sodium nitrite, stirring, and adding 2 mL hydrochloric acid. USE - Method for preparing sulfonated graphene oxide/manganese dioxide/polypyrrole composite material (claimed). ADVANTAGE - The method is simple, environment-friendly, reliable, and suitable for industrial production. The material has high energy and power density and excellent circulation performance. DETAILED DESCRIPTION - Preparation of sulfonated graphene oxide/manganese dioxide/polypyrrole composite material comprises dissolving 0.5 g graphene oxide in 100 mL deionized water, ultrasonic treating for 30 minutes, adding potassium permanganate and manganese sulfate solution, ultrasonic treating for 5 minutes, reacting at 185 degrees C for 8 hours, cooling, washing with deionized water, neutralizing to obtain graphene/manganese oxide colloid, mixing 2.3 g p-aminobenzenesulfonic acid and 100 mL deionized water, heating, dissolving, adding 0.94 g sodium nitrite, stirring, adding 2 mL hydrochloric acid, reacting for 10 minutes to obtain aromatic diazonium salt, adding to graphene/manganese oxide colloid, reacting for 2 hours to obtain complex solution, dissolving 0.05-2 g pyrrole in 50 mL chloroform, adding to complex solution, polymerizing at 0-5 degrees C for 24 hours, filtering, and washing at 60 degrees C for 12 hours. Mass ratio of potassium permanganate and manganese sulfate is 0.1-2:1.