Patent ID: 7722995

Claim:
A non-aqueous electrolytic solution comprising a non-aqueous solvent, an electrolyte salt, and at least one compound selected from carbonate-modified silanes having the formula (1) and carbonate-modified siloxanes having the formula (2): R 1 (4−x) R 2 x Si (1) R 1 a R 2 b SiO (4−a−b)/2 (2) wherein R 1 is each independently selected from the group consisting of alkyl, aryl, aralkyl, amino-substituted alkyl, and carboxyl-substituted alkyl radicals of 1 to 30 carbon atoms which may be substituted with halogen atoms; R 2 is a carbonate radical of the formula (3): wherein R 3 is each independently an alkyl, aryl or aralkyl radical of 1 to 30 carbon atoms, which may be substituted with halogen atoms, and A is an alkylene radical of 2 to 20 carbon atoms, x is an integer of 1 to 4, a is a positive number from 1.0 to 2.5, b is a positive number from 0.001 to 1.5, and the sum of a+b is from 1.001 to 3.