▎ 摘　　要

NOVELTY - An anode active material comprises a carbon-based particle and a coating layer bonded to at least a portion of the surface of carbon-based particle. The coating layer comprises boron and conductive material. USE - The anode active material is used in lithium secondary battery used as a power source of mobile electronic device such as camcorder, mobile phone, laptop computer, eco-friendly vehicle such as hybrid automobile. ADVANTAGE - The anode active material enables to form lithium secondary battery with improved operational stability and electrical property. The electrolyte decomposition reaction is suppressed by the coating layer of anode active material, to improve the capacity and life-span of the battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. method of preparing an anode active material. 2. lithium secondary battery, DESCRIPTION OF DRAWING(S) - The drawing shows schematic top planar view of a lithium secondary battery containing anode material.