Patent ID: 7217480
Filing Date: 2007-05-15
Classification: H01M,Y02E

Abstract:
1. An organic electrolytic solution comprising a lithium salt, an organic solvent, and a phosphonate compound of formula (1) below: wherein R 1 and R 2 are independently selected from among 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 2 –C 20 alkenyl group, a substituted or unsubstituted C 6 –C 30 aryl group, a substituted or unsubstituted C 7 –C 30 aralkyl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted C 2 –C 30 heteroaryl group, a substituted or unsubstituted C 3 –C 30 heteroaralkyl group, a substituted or unsubstituted C 2 –C 30 heteroaryloxy group, a substituted or unsubstituted C 5 –C 20 cycloalkyl group, and a substituted or unsubstituted C 2 –C 20 heterocycloalkyl group; and R 3 and R 4 are independently selected from among a hydrogen atom and a substituted or unsubstituted C 1 –C 20 alkyl group.