Positive electrode material of lithium-ion battery and preparation method therefor
摘要
說明書
In one embodiment, a coating layer is provided on at least part of the surface of the second calcined product. The coating layer may comprise at least one oxide selected from a group consisting of B2O3, Al2O3, SiO2 and W2O5. The providing of the coating layer may comprise mixing the second calcined product with a coating agent, and subjecting to a third calcining at 250-500° C. In providing of the coating layer, the mixing may be operated by ball milling, shearing, grinding, blending and the like. The second calcined product and the coating agent are mixed in a molar ratio of, for example, 1:0.01-0.1. Preferably, the mixing may be operated for 1-4 hours. The coating agent may be a material that can be converted into the coating layer under the conditions of the third calcining. It may include, for example, boric acid, aluminum hydroxide, pseudo boehmite, boehmite, gibbsite, bayerite, silicic acid, orthosilicic acid or ammonium paratungstate.
