▎ 摘　　要

NOVELTY - Preparing precursor comprises (i) fully mixing iron source solution, nickel source solution and phosphorus source solution to obtain a first mixed solution, (ii) adjusting the pH of the first mixed liquid to 2-3 by using ammonia water, (iii) fully stirring at 10-80degrees Celsius to obtain second mixed liquid, (iv) spraying and drying the second mixed fluid to obtain precursor, (v) preparing nickel iron phosphate compound (I), and (vi) preparing a second mixed solution by fully mixing the nickel-iron phosphate solution and the phosphorus phosphate solution. USE - Preparation of precursor used for preparing nickel iron phosphate anode material. ADVANTAGE - The precursor obtained by the preparation method is more environment-friendly, the risk of safety in the production is lower, it can effectively increase the connection performance of the precursor particles, it is easy to realize industrial batch preparation of precursor, it provides support for the preparation of subsequent nickel iron phosphate. DETAILED DESCRIPTION - Preparing precursor comprises (i) fully mixing iron source solution, nickel source solution and phosphorus source solution to obtain a first mixed solution, (ii) adjusting the pH of the first mixed liquid to 2-3 by using ammonia water, (iii) fully stirring at 10-80degrees Celsius to obtain second mixed liquid, (iv) spraying and drying the second mixed fluid to obtain precursor, (v) preparing nickel iron phosphate compound of formula NixFe1-xPO4 (I), and (vi) preparing a second mixed solution by fully mixing the nickel-iron phosphate solution and the phosphorus phosphate solution. x=0.2-0.5.5. An INDEPENDENT CLAIM is included for a preparation method of lithium nickel iron phosphate anode material including fully mixing lithium nickel phosphate powder, fast ion conductor, and graphene powder.