MODIFIED SILICON MONOXIDE MATERIAL FOR USE IN NEGATIVE ELECTRODE OF LITHIUM-ION BATTERY AND PREPARATION METHOD THEREFOR

A modified silicon monoxide material is used for a negative electrode of a lithium battery, and is prepared by reacting raw materials of silicon, silicon dioxide and metal silicate under high-temperature and vacuum conditions to prepare silicon monoxide; and meanwhile, reacting the metal vapor with silicon monoxide in the preparation process to in situ form metal silicate. In the modified silicon monoxide material, the metal silicate is uniformly dispersed around the silicon and the silicon monoxide to form silicon-containing particles, and a carbon material coats the surfaces of the silicon-containing particles.