abstract |
To provide a lithium secondary battery having a high output by using a relatively inexpensive positive electrode and suppressing a decrease in repeated charge / discharge characteristics (cycle characteristics) of the battery. A positive electrode using a positive electrode active material containing manganese, a cyclic siloxane compound of formula (1), a fluorosilane compound of formula (2), a compound of formula (3), a compound having an SF bond, A lithium secondary battery using a nonaqueous electrolytic solution containing at least 10 ppm of nitrate, nitrite, monofluorophosphate, difluorophosphate, acetate or propionate in the entire nonaqueous electrolytic solution. [In General Formula (1), R 1 and R 2 are organic groups having 1 to 12 carbon atoms, and n is an integer of 3 to 10. In General Formula (2), R 3 to R 5 are organic groups having 1 to 12 carbon atoms, x is an integer of 1 to 3, p, q, and r are each an integer of 0 to 3, and 1 ≦ p + q + r ≦ 3. In general formula (3), R 6 to R 8 are organic groups having 1 to 12 carbon atoms, and A is a group composed of H, C, N, O, F, S, Si and / or P. ] [Selection figure] None |