Nonaqueous electrolyte and lithium secondary battery employing the same
View Patent ↗A nonaqueous electrolyte which contains a nonaqueous organic solvent and a lithium salt dissolved therein is provided. Also provided is a lithium secondary battery employing the nonaqueous electrolyte.
1. A nonaqueous electrolyte which comprises a nonaqueous organic solvent and a lithium salt dissolved therein, wherein the nonaqueous organic solvent comprises a sulfonic compound represented by formula (2):
wherein L 2 represents a Z 2 -valent connecting group composed of carbon atom(s) and hydrogen atoms, R 2 represents a fluorinated aliphatic saturated hydrocarbon group, n 2 is an integer of 1 or more, and Z 2 is an integer of 2 or more.
2. The nonaqueous electrolyte according to claim 1 , wherein the total content of the sulfonic compound represented by formula (2) is 0.01 to 15% by weight based on the nonaqueous electrolyte.
3. A lithium secondary battery employing the nonaqueous electrolyte according to claim 1 .