▎ 摘　　要

NOVELTY - High-capacity fast-charging negative electrode composite material comprises a multi-layer structure, the inner core of the multi-layer structure is artificial graphite, the middle layer is a transition metal oxide layer coated on the surface of the inner core, and the outer layer is a β-type titanium dioxide material layer. The transition metal oxide is nickel oxide (NiO), iron oxide (Fe2O3), aluminum oxide (Al2O3), zirconium oxide (ZrO2), copper oxide (CuO) and cobalt oxide (Co3O4). USE - High-capacity fast-charging negative electrode composite material. ADVANTAGE - The high-capacity fast-charging negative electrode composite material utilizes the high structural stability and high electronic conductivity of the inner core artificial graphite, the high capacity of the transition metal oxide in the middle layer, and the high lithium titanate formed during the charging and discharging process of the outer layer titanium dioxide, and characteristics of ionic conductivity and the synergistic effect between the three can improve the energy density of the material, and the cycle performance and rate performance of the material can also be improved. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a high-capacity fast-charging negative electrode composite material, which involves mixing transition metal oxide, graphene oxide, and aluminum-titanium composite coupling agent uniformly in a dispersion medium by a high-energy ball mill to prepare a coating liquid slurry (A), adding artificial graphite into it, and after uniform dispersion, performing spray drying to obtain a precursor composite material (B) of transition metal oxide-coated artificial graphite, mixing the beta titanium dioxide, the conductive agent and its dispersion medium uniformly, obtaining a coating liquid (C), and mixing the precursor composite material (B) and the coating liquid (C), drying and then transferring to a tube furnace, and in an inert atmosphere, heating to 700-1000℃, holding for a period of time, cooling artificial graphite composite material to room temperature in an inert atmosphere to obtain a high-capacity fast-charging negative electrode composite material.