A capacitor and a method for producing a capacitor are disclosed. In an embodiment, a capacitor includes a winding having a cathode foil, an anode foil, separators arranged therebetween and a projection region in which the cathode foil projects beyond the anode foil, wherein, in the projection region, a plurality of layers of the cathode foil are arranged to form a bundle and are directly electrically connected to one another.

An electrolytic capacitor includes a capacitor main body. The capacitor main body includes an exterior member and a pair of lead members. The exterior member includes a case and a closing part. The case has a hollow column shape. The case includes an opening part at an end in an axial direction of the hollow column shape. The closing part closes the opening part. The pair of lead members each include a drawn part exposed from the closing part. The drawn part has a bar shape. When viewed in the axial direction, a width of the drawn part is 0.1 times or more of a diameter of the exterior member.

A wound capacitor is provided, the wound capacitor including a cooling channel for conducting coolant. The provided cooling channel includes an electrically non-conductive and thermally conductive material. A pulse-controlled inverter including the wound capacitor is provided. A motor vehicle including the pulse-controlled inverter and the wound capacitor are also provided.

A solid electrolytic capacitor with reduced leakage current is provided. An anode foil dielectric oxide film is formed, a lead terminal which is connected to the anode foil, a capacitor element including the anode foil, is formed in the capacitor element, and a solid electrolyte containing a conductive polymer, and a coating layer for elasticating a conductive polymer forming solution between the anode foil and the lead terminal by forming a solid electrolytic capacitor. Preferably, the coating layer is a solid-state electrolytic capacitor formed at least in the opposite portion of the external leading terminals to the anodal foil.

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.

The present invention relates to a method for manufacturing a capacitor, comprising the method steps: a) provision of a porous electrode body made of an electrode material, wherein a dielectric at least partially covers a surface of this electrode material; b) introduction of a liquid composition which comprises an electrically conductive polymer, at least one high-boiling solvent; c) filling at least a part of the pores of the porous electrode body obtained in process step b) with an impregnation solution comprising at least one impregnation solvent, wherein the at least one impregnation solvent comprises at least one hydroxy group and has a molecular weight in the range from 70 to 180 g/mol; d) encapsulation of the porous electrode body obtained in process step c). The invention also relates to capacitor manufactured with this method, the use of an electrolytic capacitor and electronic circuits.

A capacitor and a method for producing a capacitor are disclosed. In an embodiment, the capacitor includes a winding having a cathode foil, an anode foil and separators arranged therebetween, an overlap-free region, wherein the cathode foil does not overlap with the anode foil in the overlap-free region, wherein the overlap-free region adjoins an overlapping region, and wherein the cathode foil overlaps with the anode foil in a lateral direction in the overlapping region, and a cathode contact arranged in the overlap-free region, the cathode contact contacting the cathode foil.

A capacitor includes a capacitor element that holds a predetermined solution between an anode foil and a cathode foil wound up with a separator in between, a body case that is formed in the shape of a bottomed tube closed at one end with a wall and open at the other end to have an opening, a liquid supply sheet that is arranged between the inner face of the case and the outer face of the element, and a sealing member that seals the opening. The solution has a sealing member deterioration preventing agent dissolved in a lipophilic solvent. The sheet has an absorption portion that makes contact with the separator to absorb the solution and a supply portion that makes contact with the sealing member to supply it with the solution.

The present disclosure provides an electro-polarizable complex compound having the following general formula:

[M.sup.4+(L).sub.m].sup.xK.sub.n,  (I)

where complexing agent M is a four-valence metal; ligand L comprises one or more heteroatomic fragments comprising one or more neutral or anionic metal-coordinating heteroatoms and one or more electrically resistive fragments, m represents the number of ligands; x represents the oxidative state of the metal-ligand complex; K is a counter-ion or zwitterionic polymers which provides an electro-neutrality of the complex compound, n represents the number of counter-ions. The metal-coordinating heteroatoms form a first coordination sphere, and the number of heteroatoms in this first coordination sphere does not exceed 12.

A capacitor is provided with a case having a receptacle with an expandable section that allows the receptacle to extend axially when internal pressure builds within the case as a result of a fault. Terminals are mounted on the cover and electrically connected to the electrodes of a capacitor element through an interrupter plate, via leads. The plate is attached to the section of the case that extends under pressure, whereby the plate is drawn away from the cover, thereby breaking the electrical connections to the terminal. The plate may also work in conjunction with a cover that expands outward in response to internal pressure, to provide a second pressure interrupter mechanism.