Patent ID: 7799469

Claim:
A nonaqueous electrolyte solution in which an electrolytic salt is dissolved in an organic solvent and at least one compound selected from the silicon compounds represented by any of general formulae (1), (2), and (3) below is contained: wherein each of R 1 , R 2 , and R 3 independently represents an alkyl group having 1 to 8 carbon atoms, alkenyl group having 2 to 8 carbon atoms, alkynyl group having 2 to 8 carbon atoms, or aryl group having 6 to 8 carbon atoms; R 4 represents an alkylene group having 1 to 8 carbon atoms, alkenylene group having 2 to 8 carbon atoms, alkynylene group having 2 to 8 carbon atoms, or arylene group having 6 to 8 carbon atoms; n represents 1 or 2; when n is 1, X represents a fluorine atom, trifluoromethyl group, alkoxy group having 1 to 8 carbon atoms, alkenyloxy group having 2 to 8 carbon atoms, aryloxy group having 6 to 8 carbon atoms, acyloxy group having 2 to 8 carbon atoms, sulfonyloxy group having 1 to 8 carbon atoms, isocyanato group, isothiocyanato group, or cyano group; and when n is 2, X represents an alkylene group having 1 to 8 carbon atoms, alkylenedioxy group having 1 to 8 carbon atoms, alkenylene group having 2 to 8 carbon atoms, alkenylenedioxy group having 2 to 8 carbon atoms, alkynylene group having 2 to 8 carbon atoms, alkynylenedioxy group having 2 to 8 carbon atoms, arylene group having 6 to 8 carbon atoms, arylenedioxy group having 6 to 8 carbon atoms, diacyloxy group having 2 to 8 carbon atoms, oxygen atom, or direct bond.