High-stability layered positive electrode material, preparation method thereof and lithium ion battery

The invention relates to the field of lithium ion batteries, and discloses a high-stability layered positive electrode material, a preparation method thereof and a lithium ion battery. The chemical composition of the layered positive electrode material is Li < a > Ni < x > Co < y > M < z > T < p > O < 2 >, wherein M is selected from at least one of VIIB group elements and IIIA group elements, T is selected from lanthanide series metal elements, and T is enriched on the surface of the layered positive electrode material. The preparation method of the layered positive electrode material comprises the following steps: carrying out a co-precipitation reaction on a metal salt solution, a precipitator solution and a complexing agent solution to obtain a precursor; carrying out first mixing on the precursor and a lithium source, and roasting to obtain an intermediate product; and carrying out second mixing on the intermediate product, a solution containing a T compound and alkali liquor, drying and sintering to obta