Anode material, preparation method thereof and lithium ion battery

Abstract

This application provides an anode material, a preparation method thereof and a lithium ion battery. The anode material comprises SiOx and Li2Si2O5, wherein SiOx is dispersed in Li2Si2O5, and wherein 0≤x≤1.2. The preparation method comprises the following steps of: mixing a silicon oxide SiOy, a reducing lithium-containing compound and an auxiliary agent, and performing heat treatment to obtain the anode material, wherein the auxiliary agent comprises a nucleating conversion agent or a heat absorbent, and 0<y<2. The preparation method provided by this application, by using a nucleating conversion agent or a heat absorbent, can make the lithium silicate in the prepared product is only Li2Si2O5 without other lithium silicate phases, and because Li2Si2O5 is insoluble in water, the processing stability problems of the pre-lithiated material, such as gas production of slurry, low viscosity, tailing during coating, pinholes and pores after drying the polar plate, are solved.

Dependencies are inferred from the claim text.