Abstract: Provided is a preparation method for a layered cobalt-free positive electrode material, the method comprising the steps: (1) mixing a lithium salt, a nickel source, a manganese source, a dopant and a solvent, and subjecting same to wet ball milling to obtain a mixed slurry; (2) spray drying the mixed slurry to obtain a precursor; and (3) carrying out one instance of calcination on the precursor in an oxygen-containing atmosphere to obtain the layered cobalt-free positive electrode material. Further provided are a layered cobalt-free positive electrode material, which is obtained by the preparation method, and a lithium-ion battery containing the layered cobalt-free positive electrode material.

Abstract: The present invention provides a single-crystal high-nickel positive electrode material and a preparation method therefor and an application thereof. The preparation method comprises the following steps: (1) mixing a precursor, a lithium source, and a nano oxide, and performing primary sintering treatment in an oxygen-containing atmosphere to obtain a primary sintered material; and (2) mixing the primary sintered material obtained in step (1) with a titanium source and a cobalt source, and performing secondary sintering treatment in an oxygen-containing atmosphere to obtain the single-crystal high-nickel positive electrode material. The present invention uses a Ti/Co co-coating method, the residual alkali amount of the prepared single-crystal high-nickel positive electrode material can be greatly reduced, and the capacity and the rate capability can also be kept at a high level, so that the technological process is reduced, and the cost is reduced.

Abstract: A composite material and a preparation method therefor and a lithium-ion battery positive electrode material. The preparation method for the composite material comprises the following steps: performing first calcination treatment on a mixture of a manganese source, a nickel source, a lithium source and a cobalt source to obtain cobalt-doped lithium nickel manganese oxide; and performing second calcination treatment on a mixture of the cobalt-doped lithium nickel manganese oxide and silicon dioxide.

Abstract: The present disclosure provides a cobalt-free and nickel-free positive electrode material and a preparation method therefor, and a battery. The preparation method includes: preparing a cobalt-free and nickel-free matrix material, and mixing the cobalt-free and nickel-free matrix material, a lithium source, and a divalent manganese compound for reaction to obtain the cobalt-free and nickel-free positive electrode material. By adding the divalent manganese compound, the generation of lamellar LiMnO2 and spinel LiMn2O4 is inhibited, the generation of lamellar Li2MnO3 is promoted, and the cycle performance of the material is improved.

Abstract: The present disclosure provides a boron oxide-coated quaternary cathode electrode material and a preparation method and application thereof. The boron oxide-coated quaternary cathode electrode material includes a quaternary cathode electrode material matrix and a boron oxide coating layer, the boron oxide coating layer is arranged on the surface of the quaternary cathode electrode material matrix, and the quaternary cathode electrode material matrix, is LiaNixCoyMnzAl(1-x-y-z)O2, herein a=1-1.06, x=0.8-0.9, y=0.01-0.1, and z=0.01-0.1.

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.