Ternary precursor and preparation method and application thereof

The invention belongs to the technical field of ternary precursors, and provides a ternary precursor and a preparation method and application thereof, and a novel ternary precursor material, which comprises a Zr and/or Al doped core part and a Co and Al covered shell part. In the synthesis process of the ternary precursor, the core part of the synthesized material is uniformly doped with Zr and/or Al elements and the shell part is covered by Co and Al elements by changing the adding ratio and time of the raw materials. Compared with a traditional ternary material doped and coated with Zr, Co, Al and other elements in the preparation stage of the positive electrode material, doping and coating are carried out in the precursor stage, the operation steps are simple, the process cost is saved, meanwhile, the Zr, Co, Al and other elements doped and coated with the precursor are distributed more uniformly, the doping amount is easier to control, and the preparation process is simple. Therefore, the final electrical