▎ 摘　　要

NOVELTY - Anode active material comprises core particle, conductive particles formed on the core particle, and a polymer coating layer formed on the core particle and the conductive particles, where the polymer coating layer comprises a crown ether compound. USE - Anode active material used in secondary battery (claimed). ADVANTAGE - The anode active material can prevent an increase of resistance due to the polymer coating layer and to improve both an electronic conductivity and an ionic conductivity by polymer coating layer through the crown ether compound, and has improved life-span stability, achieved high capacity and high rate property, and has improved stability and electrical property. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. a secondary battery, which comprises: an anode comprising the anode active material for a secondary battery; and a cathode facing the anode; and 2. a method of preparing an anode active material for a secondary battery, which involves: surface-treating a core particle with conductive particles, and forming a polymer coating layer using a coating solution that contains a binder material and a crown ether compound on the core particle surface-treated with the conductive particles. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a secondary battery. 110Cathode active material layer 120Anode active material layer 125Anode current collector 130Anode 160Case