Preparation method of metallic oxide coated battery cathode material

Abstract

The invention relates to a preparation method of a metallic oxide coated battery cathode material. The preparation method comprises the steps as follows: a cathode material substrate is coated with a coating liquid in an air-stream mill in an impinging stream manner, and a coated material precursor is obtained; the obtained coated material precursor is sintered and the metallic oxide coated battery cathode material is obtained. According to the preparation method, the battery cathode material is coated with a metallic oxide in the impinging stream manner by the aid of air-stream mill equipment, the coating rate and coating uniformity of the metallic oxide are increased, meanwhile, the coating process is controlled by adjusting parameters of the air-stream mill, and the preparation method is simple and can be applied to industrial production.

Description

technical field

[0001] The invention relates to the field of batteries, in particular to a method for preparing a positive electrode material for a battery, in particular to a method for preparing a metal oxide-coated positive electrode material for a battery. Background technique

[0002] Since Japan's SONY company released the world's first commercial lithium-ion secondary battery in the 1990s, lithium-ion batteries have developed rapidly, especially positive electrode materials, from lithium cobalt oxide (LiCoO2) to manganic acid with a spinel structure. Lithium (LiMn 2 o 4 ), lithium iron phosphate (LiFePO 4 ) to layered multiple oxides (LiCo x Ni y mn 1-x-y o 2 , x+y≤1 and LiCo 0.2 Ni 0.8 o 2 、LiCo 0.2 Ni 0.75 al 0.05 o 2 etc.), whether it is commercial application or scientific research, has set off a wave of research. As the range of applications becomes wider and wider, people's requirements for lithium-ion batteries are also increasing: high energy den...