| 摘要 |
There is provided a lithium secondary battery with a negative electrode (503) which comprises a negative electrode active material layer (502) comprising alloy particles comprising silicon and tin and having an average particle diameter of 0.05 to 2 µm as an active material, and a negative electrode current collector (501), wherein the negative electrode active material layer (502) has a storage capacity of 1,000 to 2,200 mAh/g and a density of 0.9 to 1.5 g/cm 3 and which thereby has a high capacity and a good cycle-characteristic. Thus, a lithium secondary battery having a high capacity and a long life and so designed as to exhibit these characteristics at the same time is provided. |
