ANODE MATERIAL FOR LITHIUM-ION CHEMICAL CURRENT SOURCES AND METHOD OF OBTAINING THEREOF

摘要

An anode material is based on lithium-titanium spinel that contains doping components, chromium and vanadium, in equivalent quantities, of the chemical formula Li₄Ti_5-2y(Cr_yV_y)O_12-x, where x is the deviation from stoichiometry within the limits 0.02x0.5, and y is the stoichiometric coefficient within the limits 0y0.1. Producing the anode material involves preparation of a mixture of the initial components that contain lithium and titanium and sources of dopants, chromium and vanadium, by means of homogenization and pulverization, which is carried out until particles no greater than 0.5μ in size are obtained, with subsequent stepwise heat treatment of the prepared mixture in a controlled atmosphere of inert argon and reducing acetylene, at a ratio of the gases in the argon-acetylene stream from 999:1 to 750:250, respectively.