| abstract |
(57) Abstract: [Problem] To provide a secondary battery having a carbon-based negative electrode with a high capacity and a particularly long cycle life. In a non-aqueous electrolyte secondary battery including at least a positive electrode, an electrolyte layer containing a non-aqueous electrolyte, and a carbon-based negative electrode capable of inserting and extracting lithium, the non-aqueous electrolyte is represented by the following formula (1): (2), (3), (4) and (5) containing at least one selected from the group consisting of sulfonates, composed of a single or mixed electrolytic solvent, the dielectric constant of these solvents A non-aqueous electrolyte secondary battery having a rate of 10 to 50. Embedded image LiN (CF 3 SO 2 ) 2 (1) LiC (CF 3 SO 2 ) 3 (2) LiCF 3 SO 3 (3) LiOCF 3 SO 2 (4) LiCRq (CF 3 SO 2 ) n (5 (In the formula, R represents an alkyl group, and q and n represent a positive integer. However, the sum of q and n is 3.) |