▎ 摘　　要

NOVELTY - Preparation of graphene-manganese dioxide composite material involves centrifuging graphene oxide mixture to obtain a supernatant, adding ammonia to adjust pH, carrying out suction filtration, washing with water and calcining under inert atmosphere at 300-400 degrees C for 8-12 hours. USE - Preparation of graphene-manganese dioxide composite material used for energy storage e.g. capacitor (all claimed). ADVANTAGE - The method uses one-step transition from graphene oxide to reduced graphene oxide while supporting manganese dioxide. The composite material exhibits excellent electrochemical properties, and improves the effective utilization of the raw materials. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for application of graphene-manganese dioxide composite material.