Patent ID: 8177994
Filing Date: 2012-05-15
Classification: H01G

Abstract:
1. An electrolytic solution comprising an electrolyte (C) composed of an alkyl phosphate anion (A) represented by formula (1) or (2) given below and a cation (B), and an organic solvent (D), wherein the content of phosphoric acid contained in the electrolytic solution is 1% by weight or less: wherein R 1 is an alkyl group having 1 to 10 carbon atoms and R 2 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, wherein the cation (B) is at least one selected from the group consisting of 1,2,3,4-tetramethylimidazolinium cation, 1-ethyl-2,3-dimethylimidazolinium cation, 1-ethyl-3-methylimidazolium cation, and 1-ethyl-2,3-dimethylimidazolium cation.