Patent ID: 9536674
Date: 2017-01-03
CPC Classifications: H01G

Claim:
1. An electrolytic solution for an electrolytic capacitor comprising: a mixed organic solvent having sulfolane and γ-butyrolactone; water; an electrolyte selected from a group consisting of a quaternary imidazolinium salt of carboxylic acid and a quaternary pyrimidinium salt of carboxylic acid; boric acid; and mannitol, wherein the mass ratio of boric acid and mannitol is in a range of 1:1.2 to 1:1.6, and the total amount of boric acid and mannitol is 10.0 to 14.5% by mass of the total electrolytic solution, and the water content is 1.5 to 2.0% by mass of the total electrolytic solution.