Electrolytic capacitor
Provided is an electrolytic capacitor including a capacitor element and a liquid component. The capacitor element includes an anode foil having a dielectric layer on a surface of the anode foil, and a conductive polymer component in contact with at least a portion of the dielectric layer. The conductive polymer component contains a self-doped conductive polymer. A difference ΔHSP1 between a Hansen solubility parameter HSP p of the self-doped conductive polymer and a Hansen solubility parameter HSP e of the liquid component is 9.0 MPa 0.5 or more and 11.4 MPa 0.5 or less.
1 . An electrolytic capacitor comprising a capacitor element and a liquid component, wherein
the capacitor element includes an anode foil having a dielectric layer on a surface of the anode foil, and a conductive polymer component in contact with at least a portion of the dielectric layer,
the conductive polymer component contains a self-doped conductive polymer, and
a difference ΔHSP1 between a Hansen solubility parameter HSP p of the self-doped conductive polymer and a Hansen solubility parameter HSP e of the liquid component is 9.0 MPa 0.5 or more and 11.4 MPa 0.5 or less.
2 . The electrolytic capacitor according to claim 1 , wherein a difference ΔHSP2 between the Hansen solubility parameter HSP p and a Hansen solubility parameter HSP f of the anode foil having the dielectric layer is 10 MPa 0.5 or more and 16 MPa 0.5 or less.
3 . The electrolytic capacitor according to claim 2 , wherein the anode foil contains aluminum.
4 . The electrolytic capacitor according to claim 1 , wherein the self-doped conductive polymer contains at least a sulfo group.
5 . The electrolytic capacitor according to claim 1 , wherein
the capacitor element includes a cathode foil and a separator interposed between the anode foil and the cathode foil, and
the conductive polymer component is impregnated in the separator.