Preparation method of conductive metal oxide modified LiFePO4 positive electrode material

The invention discloses a preparation method of a conductive metal oxide modified LiFePO4 positive electrode material, wherein the preparation method comprises the following steps: A, weighing an ironsource, a phosphorus source, a lithium source and a carbon source as well as a conductive metal oxide precursor and other raw materials according to the LiFePO4 stoichiometric ratio and the relativecontent into a ball milling tank, wherein the content of the conductive metal oxide is 3%-7%, and the content of C is 0.5%-1.5%; B, adding a dispersing agent into the ball milling tank loaded with theraw materials, and carrying out ball milling on a planet ball mill to obtain a mixed slurry; C, placing the mixed slurry in a drying oven, drying to obtain a dried mixed powder, and grinding the mixed powder into a powder with the particle size of 10-30 nm; and D, placing the dried mixed powder in a temperature control furnace and calcining in an inert environment, then naturally cooling down toroom temperature, and thus o