Provide is an electrolytic capacitor for a middle-to-high voltage application that is equal to or higher than 100 V which suppresses the total amount of gas to be produced in the electrolytic capacitor. The anode foil of the electrolytic capacitor includes an enlarged surface portion provided with tunnel-shape pits formed from the foil surface in the thickness direction of the foil, and a dielectric oxide film formed on the surface of the enlarged surface portion. The cathode body of the electrolytic capacitor includes a cathode foil formed of a valve acting metal, and a carbon layer formed on the cathode foil.

This invention describes a packaging structure for roll-type (wound-type) aluminum conductive polymer capacitor element. Two protective substrates are applied to sandwich a roll-type capacitor element in between with an insulating material surrounding the capacitor element also in between the protective substrates. The protective substrates comprise electrically separated anodic conductive pad and cathodic conductive pad on their surfaces and through holes that pass through the conductive pads. The capacitor element is oriented with its axis perpendicular to the two substrates. The anodic and cathodic leads of the capacitor element pass through the through holes. An anodic external terminal is plated over the anodic conductive pad and a cathodic external terminal is plated over the cathodic conductive pad so that the anodic external terminal is electrically connected to the anodic lead and the cathodic external terminal is electrically connected to the cathodic lead.

A capacitor 1 includes a capacitor element 3 holding solution between an anode foil 5 and a cathode foil 7 that are wound up with a separator 6 in between, a body case 2 for housing the capacitor element 3, and a sealing member 4 for sealing the body case 2. A part of the separator 6 makes contact, at a plurality of points or over an area, with the face of the sealing member 4 facing the capacitor element 3 so as to rest on that face. The solution contains, dissolved in a lipophilic solvent, deterioration preventing agent that solidifies by oxidation. The solution is supplied through the separator 6 to the sealing member 4 and permeates the sealing member 4, so that a coating 17 resulting from the agent solidifying coats the outer face of the sealing member 4, leaving the solution present in the sealing member 4.

An electrolytic capacitor includes an anode body having a dielectric layer, and a solid electrolyte layer including a conductive polymer. The solid electrolyte layer includes the conductive polymer, an anion, and a cation. The anion is an anion corresponding to at least one acid selected from the group consisting of a phosphorus-containing oxoacid, sulfuric acid, and a carboxylic acid. The cation is a nitrogen-containing cation.

The instant disclosure provides a polymer composite material, the method for manufacturing the polymer composite material, a capacitor package structure using the polymer composite material and the method for manufacturing the capacitor package structure. The polymer composite material is used for the cathode of a capacitor, wherein the polymer composite material includes poly(3,4-ethylenedioxythiophene), polystyrene sulfonate and a nanomaterial. Polystyrene sulfonate is connected between the nanomaterial and poly(3,4-ethylenedioxythiophene), and polystyrene sulfonate is bonded to the poly(3,4-ethylenedioxythiophene) through a polymerization process. The content of the nanomaterial ranges from 0.01-1.5 wt. % based on the weight of the polymer composite material.

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.

A capacitor package structure is provided. The capacitor package structure includes a capacitor element which includes a functional coating disposed on a surface thereon and a conductive polymer layer disposed on the functional coating. A conductive polymer composite material in the conductive polymer layer is connected to the surface of the capacitor element through a silane coupling agent in the functional coating. The silane coupling agent has a general formula of Y(CH.sub.2).sub.nSiX.sub.3, wherein n is an integer of 0 to 3. X is same or different substituent selected from the group consisting of: chloride, methoxy group, ethoxy group, methoxyethoxy group, and acetoxy group, and Y is a vinyl group, an amino group, an epoxy group, a methacryloyloxy group, a thiol group, a uramino group or an isobutyl group.

A solid electrolytic capacitor includes both a solid electrolyte and an electrolyte solution between electrode foils, wherein a rise in ESR can be sufficiently suppressed for a long time and for which a long life can be realized, and a method for manufacturing the capacitor is provided. To achieve the foregoing, this solid electrolytic capacitor includes an amine represented by general formula (1) as the basic component of an electrolytic solution. In the formula, R.sup.1 represents hydrogen, an alkyl group, a hydroxyalkyl group, or an alkoxyalkyl group. R.sup.2, R.sup.3, R.sup.4, and R.sup.5 each independently represent hydrogen, an alkyl group, a hydroxy group, a hydroxyalkyl group, an alkoxy group, or an alkoxyalkyl group. The ends of R.sup.2 and R.sup.3 may be bonded to each other to form a ring. The ends of R.sup.4 and R.sup.5 may be bonded to each other to form a ring.

##STR00001##

A capacitor 1 includes a capacitor element 3 holding solution between an anode foil 5 and a cathode foil 7 that are wound up with a separator 6 in between, a body case 2 for housing the capacitor element 3, and a sealing member 4 for sealing the body case 2. A part of the separator 6 makes contact, at a plurality of points or over an area, with the face of the sealing member 4 facing the capacitor element 3 so as to rest on that face. The solution contains, dissolved in a lipophilic solvent, deterioration preventing agent that solidifies by oxidation. The solution is supplied through the separator 6 to the sealing member 4 and permeates the sealing member 4, so that a coating 17 resulting from the agent solidifying coats the outer face of the sealing member 4, leaving the solution present in the sealing member 4.

In an embodiment an anode lead tab is configured for externally contacting an anode foil in an electrolytic capacitor, wherein the anode lead tab has a roughened surface configured to protect the anode lead tab from surface dissolution.