Patent ID: 7312001

Claim:
A non-aqueous electrolytic solution comprising: a lithium salt; at least one organic solvent selected from the group consisting of diethyleneglycol dimethylether (CH 3 (OCH 2 CH 2 ) 2 OCH 3 ), diethyleneglycol diethylether (C 2 H 5 (OCH 2 CH 2 ) 2 OC 2 H 5 ), triethyleneglycol dimethylether (CH 3 (OCH 2 CH 2 ) 3 OCH 3 ), triethyleneglycol diethylether (C 2 H 5 (OCH 2 CH 2 ) 3 OC 2 H 5 ), 1,3-dioxolane, 4,5-diethyl-dioxolane, 4,5-dimethyl-dioxolane, 4-methyl-1,3-dioxolane, and 4-ethyl-1,3-dioxolane; and at least one of compounds having formula (1) below: wherein 0.1-5 parts by weight of the at least one of compound having formula (1) is present with respect to 100 parts by weight of said organic solvent, and where R 1 is selected from the group consisting of a hydrogen atom, a halogen atom, a hydroxy group, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 1 -C 20 alkoxy group, a substituted or unsubstituted C 1 -C 20 alkenyl group, a substituted or unsubstituted C 6 -C 30 aryl group, a substituted or unsubstituted C 6 -C 30 aryloxy group, a substituted or unsubstituted C 2 -C 30 heteroaryl group, a substituted or unsubstituted C 2 -C 30 heteroaryloxy group, and where R 3 is selected from the group consisting of a hydrogen atom, a halogen atom, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 1 -C 20 alkenyl group, a substituted or unsubstituted C 6 -C 30 aryl group, and a substituted or unsubstituted C 2 -C 30 heteroaryl group; and R 2 is selected from the group consisting of a hydrogen atom, a halogen atom, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 1 -C 20 alkenyl group, a substituted or unsubstituted C 6 -C 30 aryl group, and a substituted or unsubstituted C 2 -C 30 heteroaryl group.