SiO-C COMPOSITE POWDER FOR LITHIUM SECONDARY BATTERIES AND PREPARATION METHOD THEREOF

摘要

Provided is a negative active material which is used as a negative electrode material for lithium secondary batteries. More specifically, provided is SiO-C composite powder for lithium secondary batteries, wherein SiO particles are coated with carbon (C), as well as a method for preparing the same. The negative active material exhibits excellent battery efficiency, does not significantly change in volume and thus has a long cycle life.