POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF

The present invention relates to the electrochemical field, and in particular, to a positive electrode material, and a preparation method and uses thereof. The present invention provides a positive electrode material, including a substrate. The substrate includes secondary particles containing primary particles. A surface of the substrate is coated with an oxide coating layer. By doping a high-nickel substrate and coating the surface of the substrate of the positive electrode material, the present invention controls a powder resistivity of the positive electrode material to be in an appropriate range, reduces a specific surface area of the positive electrode active material, decreases the amount of residual lithium on the surface, mitigates polarization of the positive electrode material, reduces a direct current impedance of a lithium-ion battery, effectively reduces side reactions between the positive electrode material and an electrolytic solution, suppresses battery gassing, increases a volumetric energy density of the battery, and improves cycle performance and rate performance.