Positive electrode material and preparation method and application thereof

Abstract

The invention provides a positive electrode material and a preparation method and an application thereof. The positive electrode material at least includes: a positive electrode active material; and a coating layer coating the positive electrode active material, the coating layer including a halide solid electrolyte; wherein: the positive electrode active material includes nLi2MnO3·(1−n)LiMnaCobNicO2, and 0.2≤n≤0.5, a+b+c=1; a chemical formula of the halide solid electrolyte is Li2+mZr1−mFemCl6−x−yBrxIy, and 0<m≤0.5; x=0 to 6, y=0 to 6, x+y≤6. The invention provides a positive electrode material and a preparation method and an application thereof that may improve the interface stability between a positive electrode sheet and a solid electrolyte and improve a stability and a cycle performance of a lithium-ion battery.

Dependencies are inferred from the claim text.