| abstract |
The present invention relates to a lithium secondary battery, wherein the lithium secondary battery includes a negative electrode including a positive electrode negative electrode active material including a positive electrode active material, and a non-aqueous electrolyte including a non-aqueous organic solvent and a lithium salt, and the positive electrode includes 3.7 to 3.7. With a mixture density of 4.1 g / cc, the non-aqueous electrolyte includes a nitrile series compound additive, a non-aqueous organic solvent and a lithium salt.n n n The lithium secondary battery of the present invention can improve the cycle life characteristics at a high positive electrode mixture density of 3.7 to 4.1 g / cc by using a nitrile-based compound as an electrolyte additive, it is possible to obtain a high capacity. |