Lithium ion battery positive electrode material and preparation method and application thereof

The invention discloses a lithium ion battery positive electrode material and a preparation method and application thereof, and belongs to the technical field of new energy. The lithium ion battery positive electrode material provided by the invention comprises a lithium layered metal oxide, a perovskite layer and a fast ion conductor layer from the center to the surface, and the chemical formula of the perovskite layer comprises M (Ni < x > Co < y > Mn < z >) O < 3 >. According to the designed structure, the ionic conductivity and the electronic conductivity of the lithium ion battery positive electrode material can be effectively improved, so that the impedance of the lithium ion battery positive electrode material is reduced, a wrapping protection effect is also provided, and the cycle performance and the rate capability of the obtained lithium ion battery positive electrode material are integrally improved. The invention also provides a preparation method and application of the lithium ion battery positiv