ANODE ACTIVE MATERIAL FOR LITHIUM RECHARGEABLE BATTERY, ITS PREPARATION AND LITHIUM BATTERY USING SAME

摘要

PURPOSE: An anode active material for a lithium secondary battery is provided to improve initial efficiency and lifetime of a lithium secondary battery. CONSTITUTION: An anode active material comprises a substrate consisting of alloy capable of forming alloy along with lithium; and a metal nitride component on the substrate. The metal nitride component includes one or more metal selected from Li, Ti, Al, Zr, and Si. The material is Si, SiOx, or Si, where x is 0