Cobalt-free high-nickel positive electrode material, preparation method therefor and use thereof

Abstract

Provided in the present disclosure are a cobalt-free high-nickel positive electrode material, a preparation method therefor and use thereof. The cobalt-free high-nickel positive electrode material comprises a cobalt-free high-nickel matrix material and a coating layer coated on the cobalt-free high-nickel matrix material, wherein a chemical formula of the cobalt-free high-nickel matrix material is LimNixMnyO2, where 0.2≤m≤0.8, 0.4≤x≤0.95, and 0.05≤y≤0.6; and the coating layer is TiBzO1-z, where 0.2≤z≤0.8. The cobalt-free high-nickel positive electrode material obtained by means of modification using the coating layer TiBzO1-z has good acid resistance and wear resistance, high mechanical strength and excellent conductivity; and when the cobalt-free high-nickel positive electrode material is used for a lithium ion battery, the high-temperature cycling performance, capacity and initial efficiency of the lithium ion battery are greatly improved.

Dependencies are inferred from the claim text.