| 摘要 |
The present invention relates to a lithium secondary battery comprising a positive electrode, a negative electrode, a separation membrane and a non-aqueous electrolyte, wherein: the positive electrode comprises a positive electrode active material of LiaNixMnyCozO2(a+x+y+z=2, 0.9≤a≤1.1, 0≤x, 0≤y, 0≤z); the non-aqueous electrolyte comprises (i) fluorinated cyclic carbonate, (ii) propionate ester, and (iii) non-halogenated carbonate, the mixture weight ratio (i:ii) thereof being 20:80 to 50:50. |
