▎ 摘　　要

NOVELTY - A manganese iron oxide/reduced graphene oxide composite material preparing method involves dispersing graphite oxide powder fully in deionized water to obtain dispersion-A, and dispersing potassium hydroxide fully in ethylene glycol to obtain solution-B. The solution-B is added with manganese nitrate, anhydrous ferric chloride and dispersion-A to obtain dispersion-C. The dispersion-C is subjected to hydrothermal reaction, cooling, suction filtration, washing and drying to obtain sample. The sample is calcined at high temperature under a protective atmosphere to obtain the finished product. USE - Method for preparing manganese iron oxide/reduced graphene oxide composite material for use as supercapacitor electrode material (claimed). ADVANTAGE - The method enables preparing manganese iron oxide/reduced graphene oxide composite material with rich raw material sources, large specific surface area, excellent electrochemical performance, high charge-discharge capacity and better rate performance by the electrode, in simple, convenient, safe and cost-effective manner. DETAILED DESCRIPTION - A manganese iron oxide/reduced graphene oxide composite material preparing method involves dispersing graphite oxide powder fully in deionized water to obtain dispersion-A, and dispersing potassium hydroxide fully in ethylene glycol to obtain solution-B. The solution-B is added with manganese nitrate, anhydrous ferric chloride and dispersion-A to obtain dispersion-C. The dispersion-C is subjected to hydrothermal reaction, cooling, suction filtration, washing and drying to obtain manganese iron oxide/reduced graphene oxide sample. The manganese iron oxide/reduced graphene oxide sample is calcined at high temperature under a protective atmosphere to obtain the finished product. An INDEPENDENT CLAIM is also included for a use of manganese iron oxide/reduced graphene oxide composite material as supercapacitor electrode material.