The invention discloses a
lithium battery
cathode active material and a preparation method and application thereof. The
lithium ion battery
cathode material comprises
lithium-containing compound particles with the
chemical formula of Li1+xNi0.5-yMn1.5-zOu, x is larger than or equal to -0.2 and smaller than or equal to 0.2, y is larger than or equal to -0.2 and smaller than or equal to 0.2, z is larger than or equal to -0.2 and smaller than or equal to 0.2, and u is larger than or equal to 3.8 and smaller than or equal to 4.2. The surface of the
lithium battery cathode active material providedby the invention is doped with the
sulfur element in a gradient manner, so that the stability of the
cathode material is effectively improved, and the preparation method has the following advantages:1) the simple and feasible process and low cost; 2) the morphology and
crystal face distribution of the generated lithium
nickel manganese oxide material can be regulated and controlled; and 3) the comprehensive performance of the
spinel cathode active material can be improved, the development prospect is excellent, and the prepared lithium
ion secondary battery can be used as an
energy source applied to electric tools, electric bicycles,
hybrid electric vehicles, pure electric vehicles and the like.