Patent ID: 9589734
Date: 2017-03-07
CPC Classifications: H01G

Claim:
1. A solid electrolytic capacitor comprising: a capacitor element including an anode electrode foil and a cathode electrode foil wound together with a separator therebetween; a solid electrolyte layer consisting of a conductive polymer that is formed inside the capacitor element by impregnating the capacitor element with a dispersion including conductive polymer particles or powder and a solvent; and an ion-conducting substance filled in a void inside the capacitor element formed with the solid electrolyte layer, the ion-conducting substance comprising: a mixed solvent including ethylene glycol and γ-butyrolactone; and a solute which is a salt of borodisalicylic acid, the salt being selected from an ammonium salt, a quaternary ammonium salt, a quaternized amidinium salt, and an amine salt, wherein the ethylene glycol is added at 10 to 60 wt % of the mixed solvent, and the γ-butyrolactone is added at 40 wt % or less of the mixed solvent.