NEGATIVE ELECTRODE ACTIVE MATERIAL FOR A LITHIUM SECONDARY BATTERY, METHOD FOR MANUFACTURING SAME, AND LITHIUM SECONDARY BATTERY USING SAME

摘要

The present invention relates to a negative electrode active material for a lithium secondary battery, to a method for manufacturing same, and to a lithium secondary battery using same, in which the negative electrode active material comprises carbides obtained by heat-treating a polyurethane resin in an active-gas atmosphere, and carbonizing the heat-treated resin, thereby reducing the specific surface area and thus relieving problems of moisture adsorption, improving initial charging/discharging efficiency of a secondary battery, and thus improving the energy density of the secondary battery and improving the characteristics of the battery, such as imparting a lengthened lifespan and improved charging/discharging output properties, high-temperature storage characteristics, etc. thereto.