▎ 摘　　要

NOVELTY - Graphene-doped nickel-cobalt lithium manganate composite anode material comprises graphene-free nickel-cobalt-manganese oxide core or graphene-doped nickel-cobalt-manganese oxide core, and graphene-doped nickel-cobalt lithium manganese oxide shell, the average thickness of the graphene-doped nickel-cobalt lithium manganate shell is 0.5-3 mu m, the D10 size of the doped graphene sheet diameter is greater than or equal to the thickness of the shell, and the D90 size is less than or equal to 3 times the shell thickness. USE - Used as graphene-doped nickel-cobalt lithium manganate composite anode material. ADVANTAGE - The method improves conducting graphene doping on the electrochemically active surface of the nickel-cobalt-manganese ternary material, and conductivity of the ternary material. The material reduces side reaction between the ternary material and the electrolyte, and has good rate performance and cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphene-doped nickel-cobalt-manganese oxide composite cathode material, comprising (i) co-precipitating nickel-cobalt-manganese ternary precursor core or graphene-doped nickel-cobalt-manganese ternary precursor core, (ii) co-precipitating graphene-doped nickel-cobalt-manganese ternary precursor shell outside the core of the nickel-cobalt-manganese ternary precursor to obtain nickel-cobalt-manganese ternary precursor, and (iii) mixing nickel-cobalt-manganese ternary precursor and lithium source according to certain molar ratio, and sintering at certain temperature.