| 摘要 |
A non-aqueous electrolytic solution containing a ketone compound having the formula (I): [each of R<1 >and R<2 >independently represents a linear or branched alkyl group; and each of R<3>, R<4>, R<5 >and R<6 >independently represents a hydrogen atom or a linear or branched alkyl group; provided that R<1 >and R<4 >can be combined to form a cycloalkanone ring in conjunction with a propanone skeleton to which R<1 >and R<4 >are connected, that two or more of an alkyl group of R<2>, an alkyl group of R<5>, a branched chain of an alkyl group of R<1>, and a branched chain of an alkyl group of R<1 >can be combined to form a cycloalkane ring, or that an alkyl group of R<1 >and an alkyl group of R<2 >and/or an alkyl group of R<1 >and an alkyl group of R<5 >can be combined to each other to form a cycloalkane ring] is favorably employed as a constituent material for preparing a lithium secondary battery that is excellent in the battery performances and cycle performance.
|
