METHOD OF PREPARING ANODE MATERIAL FOR LITHIUM SECONDARY BATTERY, ANODE MATERIAL FOR LITHIUM SECONDARY BATTERY PREPARED BY THE METHOD, AND SECONDARY BATTERY COMPRISING THE ANODE MATERIAL

摘要

A method of preparing an anode material for a lithium secondary battery is provided to ensure excellent cycleability and charging/discharging characteristic and to reduce the irreversible side reaction with electrolyte. A method of preparing an anode material for a lithium secondary battery comprises (A) a step for forming a polysiloxane-based polymer coating layer on the surface of a carbon-based anode material by dipping the carbon-based anode material in a polysiloxane-based polymer solution and heat-treating the dipped carbon-based anode material; (B) a step for heat-decomposing the polysiloxane-based polymer layer of the carbon-based anode material coated with the polysiloxane-based polymer layer hardened under the inert atmosphere; and (C) a step for oxidizing the polysiloxane layer by heat-treating the carbon-based anode material coated with the heat-decomposed polysiloxane layer.