| abstract |
PROBLEM TO BE SOLVED: To provide an electrolytic capacitor having a high capacitance and a low ESR. SOLUTION: An anode foil having a dielectric layer on the surface and a cathode foil having a coating layer on the surface are wound around a capacitor element via a separator, and a solid provided between the anode foil and the cathode foil. The solid electrolyte layer comprises an electrolyte layer and an electrolytic solution impregnated in the capacitor element, the coating layer includes an inner layer containing titanium or a compound of titanium, and an outer layer containing carbon. An electrolytic capacitor containing a conductive polymer, a polymer dopant, and a base component, wherein the base component is at least one selected from ammonia, 1 to 3 amines, quaternary ammonium, and quaternary amidinium. [Selection diagram] Fig. 1 |