▎ 摘　　要

NOVELTY - Anode material comprises silicon-based negative active material and graphene. The average particle diameter of the negative active materials is 30-1 nm. The long axis length of the graphene is 30 times more than the average particle diameters of the positive active materials. The binder includes polyacrylic acid, polyacrylate, lithium polyacrylate, styrene-butadiene rubber, carboxymethyl cellulose, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate and/or sodium dodecylbenzene sulfonate. USE - The anode material is useful for lithium secondary battery. ADVANTAGE - The material improves durability deterioration characteristics while maintaining excellent initial efficiency of a battery cell by deriving optimal combination of the silicon-based negative active material in the negative electrode and the conductive material that imparts electric conduction function. The material reduces manufacturing cost by using inexpensive Si-based material as a negative electrode active material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing anode material.