▎ 摘　　要

NOVELTY - The material has a molybdenum electrode dipped in 0.1-0.5mol/L of dilute sulfuric acid solution. A polypyrrole and manganese dioxide forming compound is dipped in graphite alkene to form complex three-dimensional (3D) graphene. An electrochemical deposition potential range of cyclic voltammetry of reactant dosage is scanned for -0.2-1.2 V. The 0.1-0.5mol/L of the dilute sulfuric acid solution is dissolved with 0.1-0.3mol/L of manganese salt e.g. manganese sulfate or manganese acetate, and 0.05-0.2mol/L of pyrrole monomer. USE - Polypyrrole modified/manganese dioxide complex 3D graphene composite material for an ultra-capacitor (claimed). ADVANTAGE - The material has simple preparation process, low raw material resource, low preparation cost and wide application range. The material can control ratio of composite components by reactant dosage cyclic voltammetry scanning parameters and amounts and obtain a ternary composite material with high capacity and stable property. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a polypyrrole modified/manganese dioxide complex 3D graphene composite material preparation method.