| abstract |
An object of the present invention is to reduce ESR even in a high temperature environment and to suppress dissolution of aluminum used for capacitor electrodes. A capacitor element is formed by winding an anode foil and a cathode foil into a cylindrical shape via a separator. The separator holds a conductive polymer and an electrolytic solution. The electrolytic solution includes a first solvent containing a lactone and a second solvent containing a compound represented by the following chemical formula 1. Here, n is an integer of 1 or more, R 1 is C X H 2X , X is an integer of 1 or more, and R 2 , R 3 , R 4 , R 5 , R 6 and R 7 are H Or it is C Y H 2Y and Y is an integer of 1 or more. [Selection figure] None |