ELECTROLYTIC CAPACITOR AND METHOD OF MANUFACTURING THE SAME

摘要

Provided are an electrolytic capacitor with high withstand voltage capable of preventing deterioration of withstand voltage characteristics caused by lead-free reflow or the like and improving ESR characteristics, and a manufacturing method thereof. The electrolytic capacitor is obtained by impregnating a capacitor element in which an anode electrode foil and a cathode electrode foil are wound with a separator interposed, with a dispersion containing: particles of a conductive polymer; sorbitol or sorbitol and polyalcohol; and a solvent so as to forma solid electrolyte layer containing 60 to 92 wt % of the sorbitol or the sorbitol and polyalcohol, and by filling an electrolytic solution containing ethylene glycol in a gap portion in the capacitor element on which the solid electrolyte layer is formed.

主权项

1. An electrolytic capacitor comprising:
a capacitor element including an anode electrode foil and a cathode electrode foil that are wound with a separator interposed therebetween; a solid electrolyte layer formed on the capacitor element and composed of a conductive polymer compound dispersion containing particles of a conductive polymer and sorbitol or sorbitol and polyalcohol the solid electrolyte layer containing 60 to 92 wt % of the sorbitol or the sorbitol and polyalcohol, and an electrolytic solution containing ethylene glycol and filled in a gap portion in the capacitor element on which the solid electrolyte layer is formed.