▎ 摘　　要

NOVELTY - Manufacture of oxide-coated graphene-supported nickel-cobalt-manganese cathode material involves dissolving the nickel salt, the cobalt salt and the manganese salt in the aqueous solution of the graphene nitride, introducing a protective gas, stirring, reacting to obtain graphene nitride-loaded nickel-cobalt-manganese hydroxide-doped nickel-cobalt-manganese ternary positive electrode precursor core (p1), mixing the aqueous solution of graphene nitride with nickel salt, cobalt salt, manganese salt, and a metal salt aqueous solution to obtain nickel-cobalt-manganese ternary positive material precursor (p2), mixing the precursor (p2), the lithium salt, the oxide and the fluoride, calcining and cooling to obtain ternary cathode material including graphene-supported nickel-cobalt-manganese ternary cathode material as a core and a nickel-cobalt-manganese concentration gradient shell, and mixing nickel-cobalt-manganese ternary cathode material and the oxide, calcining, and cooling. USE - Manufacture of oxide-coated graphene-supported nickel-cobalt-manganese cathode material used in lithium-on secondary battery (claimed). ADVANTAGE - The prepared oxide-coated graphene-supported nickel-cobalt-manganese cathode material provides lithium-on secondary battery with high capacity and high capacity retention rate. DETAILED DESCRIPTION - Manufacture of oxide-coated graphene-supported nickel-cobalt-manganese cathode material involves uniformly mixing graphene and nitrogen source, calcining under vacuum or protective gas atmosphere, naturally cooling, adding deionized water to the mixture, stirring, filtering to obtain graphene nitride, dissolving the graphene nitride in deionized water, stirring, filtering, removing insoluble particles to obtain an aqueous solution of graphene nitride, dissolving the nickel salt, the cobalt salt and the manganese salt in the aqueous solution of the graphene nitride, introducing a protective gas, stirring, reacting to obtain graphene nitride-loaded nickel-cobalt-manganese hydroxide-doped nickel-cobalt-manganese ternary positive electrode precursor core (p1), mixing the aqueous solution of graphene nitride with nickel salt, cobalt salt, manganese salt, and a metal salt aqueous solution to obtain nickel-cobalt-manganese ternary positive material precursor (p2), mixing the precursor (p2), the lithium salt, the oxide and the fluoride, calcining and cooling in an air or oxygen atmosphere to obtain ternary cathode material including graphene-supported nickel-cobalt-manganese ternary cathode material as a core and a nickel-cobalt-manganese concentration gradient shell, and mixing nickel-cobalt-manganese ternary cathode material and the oxide, calcining, and cooling in an air or oxygen atmosphere.