▎ 摘　　要

NOVELTY - Preparation of a spherical structure nickel manganate-reduced graphene oxide negative electrode involves pouring graphene oxide prepared by modified Hummer's method into ethylene glycol and ultrasonically processing, adding nickel nitrate hexahydrate, manganese nitrate tetrahydrate, and urea to the graphene oxide dispersion, magnetically stirring, transferring the mixed solution to a polytetrafluoroethylene hydrothermal synthesis kettle, screwing tightly and closing, subjecting to solvothermal reaction in a constant temperature hydrothermal oven, naturally cooling the synthesis kettle, repeatedly centrifuging and washing the reacted solid-liquid mixture with distilled water and ethanol to obtain a black powder solid, fully drying in a vacuum drying box under a constant temperature environment, placing the dried powdered solid in a tube furnace, calcining in an inert atmosphere, and naturally cooling the powder solid and tube furnace to room temperature. USE - Preparation of spherical structure nickel manganate-reduced graphene oxide negative electrode used for lithium-ion battery. ADVANTAGE - The method produces spherical structure nickel manganate-reduced graphene oxide negative electrode having excellent rate performance and cycle stability, by simple operation steps under mild reaction conditions. DETAILED DESCRIPTION - Preparation of a spherical structure nickel manganate-reduced graphene oxide negative electrode involves pouring graphene oxide prepared by modified Hummer's method into ethylene glycol and ultrasonically processing to make it uniformly dispersed, adding nickel nitrate hexahydrate, manganese nitrate tetrahydrate, and urea to the graphene oxide dispersion, magnetically stirring until uniformly mixed, transferring the mixed solution to a polytetrafluoroethylene hydrothermal synthesis kettle, screwing tightly and closing, subjecting to solvothermal reaction in a constant temperature hydrothermal oven, naturally cooling the synthesis kettle to room temperature along with an electric heating oven, repeatedly centrifuging and washing the reacted solid-liquid mixture with distilled water and ethanol to obtain a black powder solid, fully drying in a vacuum drying box under a constant temperature environment, placing the dried powdered solid in a tube furnace, calcining in an inert atmosphere, and naturally cooling the powder solid and tube furnace to room temperature.