▎ 摘　　要

NOVELTY - A modified three-dimensional (3D) graphene composite material preparing method involves selecting manganese salt, 0.1-0.5 mole/l aniline monomer, dilute sulfuric acid solution, 3D graphene as working electrode, saturated calomel electrode as reference electrode and molybdenum electrode. The selected material is subjected to electroplating process to obtain polyaniline and manganese dioxide compound. The obtained compound is deposited on the graphite alkene to obtain the composite material. USE - Method for preparing modified 3D graphene composite material. ADVANTAGE - The method enables preparing modified 3D graphene composite material in a simple and cost-effective manner with high capacity and stability.