| abstract |
Provided are a non-aqueous electrolyte and a non-aqueous electrolyte secondary battery that can achieve both safety during overcharge and good rate characteristics after high-temperature storage. A non-aqueous solvent, a lithium salt and an overcharge inhibitor, a cyclic siloxane compound of formula (1), a fluorosilane compound of formula (2), a compound of formula (3), and a compound having an SF bond , Nitrate, nitrite, monofluorophosphate, difluorophosphate, acetate and / or propionate containing 10 ppm or more in the entire nonaqueous electrolyte and a nonaqueous electrolyte for a secondary battery Secondary battery. [In (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 (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, 1 ≦ p + q + r ≦ 3. In (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 |