Electrolytic solution for capacitor and capacitor

Abstract

Non-aqueous electrolytic solutions for capacitor which release little gas and have excellent potential window of electrochemical stability, and which enable capacitors to have excellent charging/discharging cycle properties and safety performance, and capacitors containing such non-aqueous electrolytic solutions. Such non-aqueous electrolytic solutions for capacitors include an electrolyte selected from the group consisting of ammonium salts, phosphonium salts and amidine salts and a solvent for containing at least one phosphoric ester represented by the following formula (I): wherein, R1, R2 and R3, which may be the same or different, are an alkyl group, an unsaturated hydrocarbon group or an aryl group.

Dependencies are inferred from the claim text.