Cerium-tungsten co-doped ternary positive electrode material precursor and preparation method thereof

The molecular general formula of the precursor is NixCoyAl (1-x-y-z-w) CezWw (OH) 2, z + w is larger than or equal to 2.1 * 10 and smaller than or equal to 3.15 * 10 , z is larger than 1.6 * 10 and smaller than 2.4 * 10 , w is larger than 5 * 10 and smaller than 7.5 * 10 , x is larger than or equal to 8.0 * 10 and smaller than or equal to 9.0 * 10 , and y is larger than or equal to 8.0 * 10 and smaller than or equal to 9.0 * 10 . Cerium and tungsten are used as doped raw materials to modify the positive electrode material, ammonia water is used as a complexing agent, alkali is used as a precipitant, and the ammonia water and the alkali are subjected to a co-precipitation reaction in a complexing agent system to generate a nickel-cobalt-aluminum doped precursor. The positive electrode material precursor product prepared by the method is narrow in particle size distribution, uniform in secondary particle size, relatively good in particle morphology and rela