Bimetal ion co-doped cobalt-free precursor, positive electrode material and preparation method of bimetal ion co-doped cobalt-free precursor

The invention discloses a bimetal ion co-doped cobalt-free precursor, a positive electrode material and a preparation method of the bimetal ion co-doped cobalt-free precursor, and the preparation method comprises the following steps: uniformly mixing nickel salt, manganese salt and tungsten salt with pure water to prepare an inorganic salt mixed solution A, and preparing a sodium carbonate solution and an ammonia water solution; adding an ammonia water solution into a sodium carbonate solution to obtain a mixed solution B, adding the inorganic salt mixed solution A and the mixed solution B into a reaction container, performing mixing and continuous stirring, continuously introducing protective gas, and performing washing, filtering, drying and grinding after reaction to obtain the cobalt-free positive electrode material precursor. The method can simplify the preparation process of the positive electrode material for the lithium ion battery and reduce the preparation cost of the layered positive electrode mate