▎ 摘　　要

NOVELTY - A three-dimensional porous manganese dioxide/graphene composite material preparing method involves ultrasonically dispersing the graphene oxide powder and deionized water to form a uniform mixed graphene oxide dispersion, depositing graphene oxide on the surface of the foamed nickel by using electrophoretic deposition, thermally reducing the foamed nickel to obtain a graphene electrode having a three-dimensional porous structure, and depositing manganese dioxide on a graphene electrode by electrochemical deposition to obtain the finished product. USE - Method for preparing three-dimensional porous manganese dioxide/graphene composite material. ADVANTAGE - The method enables preparing three-dimensional porous manganese dioxide/graphene composite material with high specific capacity and circulation stability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a three-dimensional porous manganese dioxide/graphene composite material prepared by the method (2) a use of three-dimensional porous manganese dioxide/graphene composite material.