An electrolytic capacitor includes a capacitor element, a case, and a sealing member. The case has an opening and houses the capacitor element. The sealing member seals the opening. The sealing member includes an elastic member that is fit in the opening. The elastic member includes a polymer component and a particle component. The polymer component includes at least butyl rubber. The particle component includes at least particles of kaolin. An average particle size of the particles of kaolin is less than or equal to 4 m.

An object is to suppress generation of molecular hydrogen from atomic hydrogen generated in a capacitor so as to suppress a rise in pressure of the capacitor due to the increased molecular hydrogen. A capacitor (2) includes a capacitor element (6) formed by winding an anode foil (14) and a cathode foil (16), and an outer case (4) storing the capacitor element therein. A hydrogen reaction film (22) reactive with atomic hydrogen generated in the outer case is formed on a surface of the cathode foil.

The instant invention provides a capacitor package structure having a functional coating and the method for manufacturing the same. The method includes coating a silane coupling agent with a general formula of Y(CH.sub.2).sub.nSiX.sub.3 on a capacitor element for forming the functional coating, in which X can be a same or different substituents and is selected from the group consisting of chloride, methoxy group, ethoxy group, methoxyethoxy group and acetoxy group, Y is a vinyl group, an amino group, an epoxy group, a methacryloyloxy group, a thiol group, a uramino group or an isobutyl group; and coating a conductive dispersion on the functional coating for enabling a polymer composite material in the functional coating to be connected to the surface of the capacitor element through the silane coupling agent.

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.

An electrolytic capacitor includes a capacitor element. The capacitor element includes an anode body that includes a dielectric layer disposed at a surface of the anode body, a cathode body, and a separator disposed between the anode body and the cathode body. The capacitor element is impregnated with an electrolytic solution. A conductive polymer and a polyacrylic acid-based compound are provided on the dielectric layer.

An electric energy storage device includes a positive electrode internal terminal composed of a plate-shaped terminal body having at least one electrolyte impregnation hole formed therein and a flange, wherein an upper surface of the terminal body and any one surface of the flange come into contact with a cell assembly to couple the positive electrode internal terminal and the cell assembly, wherein a lower surface of the terminal body comes into contact with an inner surface of a lower end of a case, and wherein the flange is pressed by a terminal-fixing beading portion so that the positive electrode internal terminal is fixed in the case.

Disclosed are a hybrid aluminum electrolytic capacitor and a method of producing the same. The preparation method includes impregnating a capacitive element in a fluid to improve the low-temperature property, where the fluid is prepared from a first organic solvent having a boiling point of 180 C. or more and a melting point of 50 C. or less, a small number of an inorganic or organic acid and an amine having a boiling point of 180 C. or more. The hybrid aluminum electrolytic capacitor prepared herein has good resistance to low temperature, specifically, at an extremely low temperature, such as 55 C., there is only a slight attenuation in the capacitance. The capacitor prepared herein can also promote the repairing effect for the oxide film defective portion of an anode foil and avoid the occurrence of a short circuit.

Disclosed are a hybrid aluminum electrolytic capacitor and a method of producing the same, where the electrolytic capacitor is impregnated in a film repairing fluid. The film repairing fluid includes an organic solvent having a b.p. of 180 C. or more, a small number of an inorganic and/or an organic acid and an amine having a b.p. 180 C. or more. The fluid has high withstand voltage and can provide repairing effect for the oxide film of the anode foil of the non-solid aluminum electrolytic capacitor. The hybrid aluminum electrolytic capacitor impregnated with the film repairing fluid of the invention has the characteristics of high voltage, high capacity, low impedance and small leakage current, so that the electrolytic capacitor can maintain low equivalent series resistance and low impedance in the high frequency range.

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.

An aspect of the present disclosure is a perovskite that includes A.sub.(n1nw+w)A.sub.(wnw)A.sub.2B.sub.nX.sub.(3n3zn+3z4e+1)X.sub.(3zn3z)X.sub.4e, where each of A, A, A are monovalent cations, B is a divalent cation, each of X, X, and X are monovalent anions, 0<w1, 0<z1, 0<e1, and 1n100000.