Preparation method of composite coated ternary positive electrode material

The invention relates to a preparation method and application of a composite coated ternary positive electrode material, and belongs to the field of battery materials. The invention provides the preparation method of the composite coated ternary positive electrode material. An oxide and a fast ion conductor are coated step by step in a solid phase, so that the occurrence of structure change and side reaction in the cycle process of the positive electrode material are solved, the cycle and safety performance of the material is improved, and meanwhile, the problem of poor conductivity of the positive electrode material is also improved. 本发明涉及一种复合包覆型三元正极材料的其制备方法和用途，属于电池材料领域。提供了一种复合包覆型的三元正极材料的制备方法，通过固相分步包覆氧化物和快离子导体，解决了正极材料循环过程中结构的变化、副反应的发生，提高了材料的循环和安全性能，同时还改善了正极材料导电性差的问题。