▎ 摘　　要

NOVELTY - Preparing copper manganite-graphene (CuMn2O4-RGO) supercapacitor composite electrode material comprises (a) dissolving copper acetate monohydrate and manganese acetate tetrahydrate in ethanol, magnetically stirring for 10 minutes, then adding polyvinylpyrrolidone, magnetically stirring for 20 minutes to obtain uniform and transparent solution, transferring the obtained mixture to a super-constant temperature water tank, heating at 85 degrees C to prepare a gel, and finally clacining the prepared gel in a muffle furnace to obtain powdery copper manganite nanoparticles, (b) preparing graphene oxide by Hummers method, using three-electrode system for adjusting the electrode potential on an electrochemical station for changing the nanoscale and electronic state of the graphene oxide electrode material to obtain reduced graphene, and (c) physically grinding the graphene and copper manganite. USE - The method is useful for preparing copper manganite-graphene (CuMn2O4-RGO) supercapacitor composite electrode material. ADVANTAGE - The method: is simple; uses easily available raw materials. The electrode material: has current density of 1 A/g and capacitance of more than 341.56 F/g when the mass ratio of copper manganite and graphene is 1:1.