▎ 摘　　要

NOVELTY - Lithium secondary battery comprises: a cathode comprising a cathode active material; an anode comprising an anode active material composite; a separator positioned between the cathode and the anode; and an electrolyte. The anode active material composite comprises: a core; a conductive composite film layer formed on a surface of the core and including a first conductive agent and a first binder; and a conductive layer formed on a surface of the conductive composite film layer and including a second conductive agent and a second binder. USE - The lithium secondary battery is used in a vehicle (claimed). ADVANTAGE - The lithium secondary battery: has improved output and lifespan characteristic, thus developing a high energy density; and improves mileage by implementing a high capacity of the vehicle battery, but the lifespan characteristics of the battery may be reduced due to the volume expansion of the silicon-carbon composite.