CARBON-BASED ANODE MATERIAL HAVING EXCELLENT HIGH POWER PROPERTY AND CYCLE LIFE CHARACTERISTICS AND SECONDARY BATTERY EMPLOYED WITH THE SAME

摘要

A carbon-based negative electrode material, a method for preparing the carbon-based negative electrode material, and a secondary battery containing the carbon-based negative electrode material are provided to improve the power characteristics and lifetime characteristics of a battery by enhancing the electron conductivity of a negative electrode material. A carbon-based negative electrode material comprises a core which comprises an amorphous carbon-based material; and a shell(coating layer) which coats the external surface of the core and comprises a highly crystalline carbon-based material, wherein the amorphous material-based material and the highly crystalline carbon-based material are mixed mechanically. Preferably the core has a size of 5-30 micrometers and the shell has a thickness of 1-10 micrometers.