| 摘要 |
PURPOSE: Provided is a lithium secondary battery, which has high capacity of 1,000 mAh/g or more per unit weight of an anode active material layer as well as shows long lifespan. CONSTITUTION: The lithium secondary battery comprises an anode(503) having an anode active material layer(502) including an anode active material comprising alloy particles formed of silicon and tin having an average particle diameter of 0.05-2 micrometers, and a collector(501), wherein the storage capacity of the anode active material layer(502) is 1,000-2,200 mAh/g and the density of the anode active material layer(502) is 0.9-1.5 g/cm3. Particularly, the anode active material layer has a thickness of 10-50 micrometers. |
