Abstract: Disclosed are an aluminum-coated precursor and a preparation method therefor. The aluminum coated precursor has a chemical formula of xMCO3(1-x).Al(OH)3, wherein M is at least one of nickel, cobalt and manganese, and x is 0.995-0.999. The aluminum-coated precursor has the advantages of a controllable particle size and uniform particle size distribution, a high degree of sphericity, a smooth particle surface, a high tap density, not easily breaking, and an excellent electrochemical performance and energy density.

Abstract: The present disclosure provides a lithium-rich carbonate precursor, a preparation method therefor, and an application thereof. The lithium-rich carbonate precursor has a solid spherical structure, and the chemical formula of the lithium-rich carbonate precursor is NixCoyMn(1?x?y)CO3. The precursor has the advantages of having controllable particle size, uniform particle size distribution, high sphericity, high tap density, good fluidity, and excellent electrochemical performance and energy density.

Abstract: Provided by the present disclosure are a carbonate precursor that has a high-nickel and low-cobalt sandwich structure, a preparation method therefor and an application thereof. The precursor comprises an inner core and an outer shell layer, wherein the outer shell layer covers at least a part of the outer surface of the inner core. The carbonate precursor having the sandwich structure has the advantages of narrow particle size distribution, good fluidity, and an excellent electrochemical performance, and may be stably produced in both an ammonia-free system and an ammonia-containing system.