| abstract |
The invention discloses a positive electrode material, which contains crystals with a superlattice structure, and the chemical formula of the crystals is xLi 2 MO 3 ·(1-x)LiNi a Co b Mn (1-a-b) O 2 , 0<x≤ 0.1, 0.8≤a<1, b≤0.1, the M is selected from one or more of Mn, Co and Ni. Also disclosed are a preparation method of the positive electrode material and a battery or capacitor comprising the positive electrode material. The positive electrode material of the present invention comprises a crystal with a layered-layered superlattice structure, and crosses another layered structure on the basis of a conventional high-nickel ternary material with a layered structure, and utilizes one of two different layered structures. In order to improve the structural stability of the product. In the positive electrode material of the present invention, the addition of manganese-based lithium-rich phase (Li 2 MnO 3 ) dilutes the nickel content in the product to a certain extent, and the reduction of the nickel content can effectively improve the gas production of the battery. Therefore, the present application can improve the safety performance of the battery in terms of reducing gas generation and stabilizing the structure of the positive electrode. |