| 摘要 |
The present invention relates to a lithium secondary battery comprising a laminated body of a unit cell and, more specifically, to a lithium secondary battery, which has excellent reliability, even if the lithium secondary battery is used for a long period of time by preventing the local deterioration. The laminated body is arranged in the order that the density of an electrode active material of the unit cell is decreased in the direction from a central unit to a peripheral unit. |
