▎ 摘　　要

NOVELTY - A graphene/manganese dioxide composite electrode material preparing method involves mixing sodium dodecyl sulfate solution, sulfuric acid solution and water to obtain a mixed solution. The mixed solution is heated with potassium permanganate solution to obtain manganese dioxide nano sheet. The manganese dioxide nanosheet and the functionalized modified graphene nanosheet are mixed and stirred in water, followed by centrifugally separating and freeze-drying to obtain product. USE - Method for preparing graphene/manganese dioxide composite electrode material for super capacitor.