Lithium nickel manganate positive electrode material, preparation method therefor and application thereof

Abstract

The present application discloses a lithium nickel manganate positive electrode material, a preparation method therefor and an application thereof. The lithium nickel manganate positive electrode material has a molecular formula of LiαNiβMn2-βMγO4-δ/N, where 0.95≤α≤1.1, 0.4≤β≤0.6, 0.0005≤γ≤0.02, 0≤δ≤0.2, M is a single-crystal dispersing element, and M is at least one of V, Nb, Ta, Mo or W; N represents a coating layer, and the coating layer includes a P compound and/or an Al compound, and a coating amount of N is 500-10000 ppm. By means of adding a small amount of a single-crystal dispersing element (V, Nb, Ta, Mo or W), a high-voltage nickel manganese material having good dispersity of single crystals is prepared. By means of uniformly coating the P compound and/or the Al compound to the lithium nickel manganate positive electrode material, the direct contact between the positive electrode material and an electrolyte, is avoided.

Dependencies are inferred from the claim text.