Nonaqueous electrolyte solution and nonaqueous electrolyte battery using same

摘要

The present invention provides a non-aqueous electrolytic solution including a methylenebissulfonate derivative and improving initial irreversible capacity and other characteristics of a battery such as a cycle characteristics, electric capacity, and storage characteristics; a method for producing thereof; and a battery using the electrolytic solution. The non-aqueous electrolytic solution includes: (1) a non-aqueous solvent comprising at least one selected from a cyclic carbonate ester, a straight chained carbonate ester and/or a cyclic carboxylic acid ester, (2) a lithium salt which may be dissolved in the non-aqueous solvent, as an electrolyte salt, and (3) a methylenebissulfonate derivative of formula [1]:;;The method includes steps of dissolving a lithium salt in a non-aqueous solvent, and then dissolving the methylenebissulfonate derivative. The non-aqueous electrolytic solution battery includes (i) the non-aqueous electrolytic solution, (ii) a negative electrode, (iii) a positive electrode, and (iv) a separator.

主权项

1. A non-aqueous electrolytic solution comprising:
(1) a non-aqueous solvent comprising at least one material selected from the group consisting of a cyclic carbonate ester, a straight chained carbonate ester and a cyclic carboxylic acid ester; (2) a lithium salt soluble in the non-aqueous solvent, as an electrolyte salt; and (3) a methylenebissulfonate derivative represented by formula [1], wherein R1 and R2 each independently represent an alkyl group having 1 to 6 carbon atoms, which may have a substitution group, a haloalkyl group having 1 to 6 carbon atoms, an alkynyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an aralkyl group having 7 to 15 carbon atoms, or a hetero cycle group, which may have a substitution group.