▎ 摘　　要

NOVELTY - Preparing a graphene oxide-supported iron phosphide nanocomposite material involves: (1) adding weighed ferric chloride hexahydrate and anhydrous sodium acetate to ethylene glycol, magnetically stirring to dissolve and dissolving a proper amount of graphene oxide in ethylene glycol; (2) mixing the obtained solutions after dissolving, where the total mass percentage of graphene oxide, ferric trichloride hexahydrate and anhydrous sodium acetate is 1-10%, 20-45% and 55-80%, respectively; (3) adding the mixed solution to a high-pressure reaction kettle for reaction, where the temperature of the reaction kettle is 140-180 degrees C, and reacting for 8-20 hours; (4) after the reaction is completed, separating, washing and drying to obtain a graphene oxide-supported iron complex as an intermediate product; and (5) phosphating the intermediate product with sodium hypophosphite according to a mass ratio of 1:(3-5), and carrying out high-temperature treatment at 350 degrees C for 2-5 hours. USE - The method is useful for preparing a graphene oxide-supported iron phosphide nanocomposite material for preparing an anode material of a lithium-ion battery (claimed). ADVANTAGE - The method provides more industrialization possibilities for the development of lithium-ion battery anode materials in the field of new energy. The nanocomposite material: improves cycle performance, rate performance and cycle stability of the lithium-ion battery; and has lamellar structure design, which improves the utilization of active materials and effectively alleviates volume expansion, and high conductivity due to the introduction of graphene oxide and phosphorus. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for use of the graphene oxide-supported iron phosphide nanocomposite material for preparing an anode material of a lithium-ion battery, which involves evenly mixing and grinding the graphene oxide-supported iron phosphide nanocomposite material, a conductive carbon and a binder, then adding a solvent, followed by coating on a copper foil, and vacuum drying.