ANODE ACTIVE MATERIAL FOR A LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING SAME, AND LITHIUM SECONDARY BATTERY INCLUDING SAME

Provided are an anode active material for a lithium secondary battery, a method for preparing same, and a lithium secondary battery including same. An anode active material for a lithium secondary battery according to the present invention includes: active particles by means of which lithium ions may be absorbed/released; and a coating layer coated on the surface of the active particles, wherein the coating layer includes a first material which is a hollow nanofiber and a second material which is a carbon precursor or LTO. When silicon is used as an anode active material for a lithium secondary battery, cracks are generated and active material particles are destroyed due to a change in volume, through the reaction with lithium ions during charging/discharging. However, the anode active material for a lithium secondary battery of the present invention may prevent the capacity from being radically reduced as the charge/discharge cycle proceeds, thereby extending cycle life, and thus achieving a high energy density appropriate for a high-capacity battery.