Abstract: An electrolytic capacitor includes a capacitor element, a solid electrolyte layer, and an electrolyte solution. The capacitor element includes an anode body on a surface of which a dielectric layer is formed. The solid electrolyte layer is provided on the dielectric layer and includes a conductive polymer and a polymer dopant. The electrolyte solution is impregnated into the capacitor element and contains a polyhydric alcohol and a borate ester.

Abstract: An electrolytic capacitor includes a capacitor element. The capacitor element includes an anode including a dielectric layer thereon and a cathode member including a conductive polymer and in contact with the dielectric layer. The capacitor element is impregnated with a liquid containing at least one of polyalkylene glycol and derivatives of polyalkylene glycol. The liquid further contains an aromatic compound having a nitro group and at least one of a hydroxyl group and a carboxyl group.

Abstract: An electrolytic capacitor includes an anode body having a dielectric layer; a solid electrolyte layer in contact with the dielectric layer of the anode body; and an electrolyte solution. The solid electrolyte layer includes a ?-conjugated conductive polymer. The electrolyte solution contains a solvent and a solute, and the solvent contains a glycol compound and a sulfone compound. A proportion of the glycol compound contained in the solvent is 10% by mass or more. A proportion of the sulfone compound contained in the solvent is 30% by mass or more. A total proportion of the glycol compound and the sulfone compound contained in the solvent is 70% by mass or more.

Abstract: An electrolytic capacitor includes a capacitor element. The capacitor element includes an anode including a dielectric layer thereon and a cathode member including a conductive polymer and in contact with the dielectric layer. The capacitor element is impregnated with a liquid containing at least one of polyalkylene glycol and derivatives of polyalkylene glycol. The liquid further contains an aromatic compound having a nitro group and at least one of a hydroxyl group and a carboxyl group.

Abstract: An electrolytic capacitor includes an anode body with a dielectric layer; a solid electrolyte layer in contact with the dielectric layer; and an electrolytic solution. The solid electrolyte layer includes a ?-conjugated conductive polymer and a first sulfonic acid. The electrolytic solution includes a solvent and an acid component. And the acid component includes a second sulfonic acid.

Abstract: An electrolytic capacitor includes an anode body having a dielectric layer; a solid electrolyte layer in contact with the dielectric layer of the anode body; and an electrolytic solution. The electrolytic solution contains a solvent and a solute. The solvent contains a glycol compound. The solute contains an acid component. The acid component contains a first aromatic compound having a hydroxyl group. A proportion of the first aromatic compound in the acid component ranges from 30% by mass to 100% by mass, inclusive.

Abstract: A method for manufacturing an electrolytic capacitor includes a first step, a second step, and a third step. In the first step, a capacitor element is formed. The capacitor element includes an anode body, a cathode body, and a separator. The anode body includes a dielectric layer formed on a surface of the anode body. And the separator is disposed between the anode body and the cathode body. In the second step, the capacitor element is impregnated with a treatment solution containing an acid component and a base component. In the third step, the capacitor element is, after the second step, impregnated with a conductive polymer dispersion in a state that a part of the treatment solution remains in the capacitor element. The conductive polymer dispersion is obtained by dispersing, in a solvent, conductive polymer particles each including polyanion. A pH of the treatment solution is higher than a pH of the conductive polymer dispersion.

Abstract: An electrolytic capacitor includes a capacitor element, a solid electrolyte layer, an electrolyte solution. The capacitor element has an anode foil with a dielectric layer, and a cathode foil. The solid electrolyte layer is provided between the anode foil and the cathode foil. And the capacitor element is impregnated with the electrolyte solution. The cathode foil includes a covering layer that contains at least one metal selected from titanium and nickel or a compound of the at least one metal. And the solid electrolyte layer contains a conductive polymer, a polymer dopant, and a base component.

Abstract: An electrolytic capacitor includes a capacitor element, a solid electrolyte layer, and a liquid substance. The capacitor element includes an anode foil with a dielectric layer, and a cathode foil. The solid electrolyte layer is provided between the anode foil and the cathode foil. The capacitor element is impregnated with the liquid substance that includes a solvent and a solute. The solute contains at least one selected from the group consisting of an acid component, a nitro compound, and a phenol compound. The cathode foil includes a covering layer that contains at least one selected from the group consisting of titanium, nickel, a compound including titanium, and a compound including nickel. And the solid electrolyte layer contains a conductive polymer and a base component.

Abstract: An electrolytic capacitor includes an anode body having a dielectric layer; a solid electrolyte layer in contact with the dielectric layer of the anode body; and an electrolyte solution. The solid electrolyte layer includes a ?-conjugated conductive polymer. The electrolyte solution contains a solvent and a solute, and the solvent contains a glycol compound and a sulfone compound. A proportion of the glycol compound contained in the solvent is 10% by mass or more. A proportion of the sulfone compound contained in the solvent is 30% by mass or more. A total proportion of the glycol compound and the sulfone compound contained in the solvent is 70% by mass or more.

Abstract: An electrolytic capacitor includes a capacitor element. The capacitor element includes: an anode foil having a dielectric layer thereon, and a cathode layer including a conductive polymer and in contact with the dielectric layer. The capacitor element is impregnated with a liquid containing at least one of polyalkylene glycol and derivatives selected from a group consisting of polyethylene glycol glyceryl ether, polyethylene glycol diglyceryl ether, polyethylene glycol sorbitol ether, polypropylene glycol glyceryl ether, polypropylene glycol diglyceryl ether, polypropylene glycol sorbitol ether, copolymers of ethylene glycol and propylene glycol, copolymers of ethylene glycol and butylene glycol, and copolymers of propylene glycol and butylene glycol.

Abstract: An electrolytic capacitor includes an anode body having a dielectric layer; a solid electrolyte layer in contact with the dielectric layer of the anode body; and an electrolytic solution. The electrolytic solution contains a solvent and a solute. The solvent contains a glycol compound. The solute contains an acid component and a base component. A mass of the acid component in the solute is greater than a mass of the base component in the solute. The acid component contains a first aromatic compound having a hydroxyl group.

Abstract: A power storage device has a power storage element and an electrolytic solution. The power storage element includes an anode body, a cathode body opposed to the anode body, and a separator interposed between the anode body and the cathode body. The separator includes a separator base material and a conductive polymer deposited on the separator base material. The power storage element is impregnated with the electrolytic solution. The separator has a first surface layer, which includes a first surface opposed to the anode body, and a second surface layer, which includes a second surface opposed to the cathode body. An amount of the conductive polymer deposited in a first separator half body, which is a part from a center of the separator to the first surface, is greater than an amount of the conductive polymer deposited in a second separator half body, which is a part from the center of the separator to the second surface.

Abstract: An electrolytic capacitor includes an anode body including a dielectric layer, a cathode body, and a conductive polymer layer and a liquid component that are disposed between the anode body and the cathode body. The cathode body includes a base material part having an outer surface that is roughened surface and has a pore opened at the outer surface, and an inorganic conductive layer covering at least a part of the outer surface. The base material part includes a first coating layer disposed along at least a part of inner wall of the pore. The first coating layer contains phosphorus.

Abstract: An electrical storage device includes an electrical storage element and an electrolytic solution. The electrical storage element is formed of an anode body, a cathode body facing the anode body, and a separator interposed between the anode body and the cathode body. The separator includes a separator substrate and a conductive polymer adhering to the separator substrate. The electrical storage element is impregnated with the electrolytic solution. The separator includes a first surface layer having a first surface facing the anode body and a second surface layer having a second surface facing the cathode body. The first surface layer includes a first region that is not provided with the conductive polymer, and the second surface layer includes a second region provided with the conductive polymer.

Abstract: An electrolytic capacitor includes an anode body having a dielectric layer on a surface of the anode body, a cathode body, and an electrolytic solution interposed between the anode body and the cathode body. The electrolytic solution contains a first ester compound and a second ester compound. The first ester compound is a condensate of boric acid and a sugar alcohol. The second ester compound contains at least one condensate selected from the group consisting of a condensate of boric acid and a monool compound and a condensate of boric acid and a polyol compound excluding a sugar alcohol.

Abstract: An electrolytic capacitor includes: an anode body having a dielectric layer; a solid electrolyte layer in contact with the dielectric layer; and an electrolytic solution. The electrolytic solution contains a solvent and a solute. The solvent contains a glycol compound. The solute contains a carboxylic acid component and a base component. A ratio of the carboxylic acid component in the solute is 200 parts by mass or more with respect to 100 parts by mass of the base component.

Abstract: A method for producing an electrolytic capacitor according to the present disclosure includes a first step of preparing a capacitor element that includes an anode body having a dielectric layer; a second step of impregnating the capacitor element with a first treatment solution containing at least a conductive polymer and a first solvent; and a third step of impregnating, after the second step, the capacitor element, in which at least a part of the first solvent remains, with a second treatment solution containing a coagulant to coagulate the conductive polymer.

Abstract: An electrolytic capacitor includes an anode body with a dielectric layer; a solid electrolyte layer; and an electrolytic solution. The solid electrolyte layer includes a ?-conjugated conductive polymer and an organic sulfonic acid. The electrolytic solution includes a solvent and an acid component, and the acid component includes a sulfuric acid. A concentration of the sulfuric acid in the electrolytic solution ranges from 2.9 ppm to 532 ppm, inclusive.

Abstract: An electrolytic capacitor includes an anode body with a dielectric layer; a solid electrolyte layer in contact with the dielectric layer; and an electrolytic solution. The solid electrolyte layer includes a ?-conjugated conductive polymer and a first sulfonic acid. The electrolytic solution includes a solvent and an acid component. And the acid component includes a second sulfonic acid.