▎ 摘　　要

NOVELTY - Anode active material comprises a primary silicon composite formed by dispersing nanosilicon particles on a first amorphous carbon matrix, and a secondary silicone composite formed by assembling the primary silicone composite in a second amorphous carbon matrix by a network made of conductive fibers. USE - The material is useful for a lithium secondary battery (claimed). ADVANTAGE - The material has high capacity and excellent lifespan characteristics, output characteristics and initial efficiency, minimizes damage to electrode, suppresses contact between the nanosilicon particles and the electrolyte, and is safe. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for producing an anode active material involving preparing a first silicon composite by mixing the first amorphous carbon precursor and the nanosilicon particles and carrying out a first heat treatment, and mixing the first silicon composite, the second amorphous carbon precursor, and the conductive fiber and carrying out secondary heat treatment to obtain a second silicon composite formed by assembling the first silicon composite by a network of conductive fibers.