Sanyo Electric Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Kazuhiro Takatani

Mutsumi Yano

Mamoru Kimoto

Hiroshi Nonoue

Tatsuji Aoyama

Takashi Umemoto

Takahisa Iida

Yoshiaki Ishimaru

Shumpei Matsushita

Kazunari Imamoto

Kenta Chashiro

Yuichiro Tsubaki

Hiroyuki Arima

Yasumi Kobayashi

Tomoyuki Tashiro

Daisuke Kubo

Miyoko Masuda

Kazuhito Kikuchi

Mitsuhisa Yoshimura

Koichi Nishimura

Kikuko Kato

Hiroaki Izu

Akito Nakamura

Hiroki Hayashi

Masaaki Nemoto

Disclosed is a method for producing an electrolytic capacitor, the method including the steps of: preparing an anode foil that includes a dielectric layer, a cathode foil, and a fiber structure; preparing a conductive polymer dispersion liquid that contains a conductive polymer component and a dispersion medium; producing a separator by applying the conductive polymer dispersion liquid to the fiber structure and then removing at least a portion of the dispersion medium; and producing a capacitor element by sequentially stacking the anode foil, the separator, and the cathode foil. The dispersion medium contains water. The fiber structure contains a synthetic fiber in an amount of 50 mass % or more. The fiber structure has a density of 0.2 g/cmor more and less than 0.45 g/cm.

Conductive polymer dispersion liquid, electrolytic capacitor, and method for producing electrolytic capacitor

A method for manufacturing an electrolytic capacitor includes a first connection step, a second connection step, a first insertion step, a housing step, and a sealing step. In the first connection step, a first internal lead having a foil shape is connected to a first electrode foil. In the second connection step, after the first connection step, a first external lead having a rod shape is connected to the first internal lead to obtain the first electrode. In the first insertion step, the first external lead is inserted into an insertion port of a sealing plate after the second connection step. In the housing step, the first electrode is housed in a container after the first insertion step. In the sealing step, an opening of the container is closed with the sealing plate after the housing step.

Electrolytic capacitor and method for producing same

An electrolytic capacitor includes a capacitor element. The capacitor element includes an anode body including a dielectric layer on a surface of the anode body, and a conductive polymer covering a part of the dielectric layer. The conductive polymer contains a first monomer unit corresponding to a 3,4-ethylenedioxythiophene compound and a second monomer unit corresponding to a 3,4-dialkoxythiophene compound.

An electrolytic capacitor includes a capacitor element, a liquid component, a case housing the capacitor element and the liquid component, and a sealing member sealing the case. the capacitor element includes a porous sintered body including a dielectric layer, a cathode foil facing at least a part of the porous sintered body, and a conductive polymer covering at least a part of a surface of the dielectric layer. The conductive polymer is in contact with the cathode foil. And a void in the capacitor element is impregnated with the liquid component.

Electrolytic capacitor

Disclosed is a method for producing an electrolytic capacitor, the method including the steps of preparing an anode foil that includes a dielectric layer, a cathode foil, and a fiber structure; preparing a conductive polymer dispersion liquid that contains a conductive polymer component and a dispersion medium; producing a separator by applying the conductive polymer dispersion liquid to the fiber structure and then removing at least a portion of the dispersion medium; and producing a capacitor element by sequentially stacking the anode foil, the separator, and the cathode foil. The dispersion medium contains water. The fiber structure contains a synthetic fiber in an amount of 50 mass % or more. The fiber structure has a density of 0.2 g/cmor more and less than 0.45 g/cm.

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.

Electrolytic capacitor and method for manufacturing same

An electrolytic capacitor including an anode body having a dielectric layer, and a solid electrolyte layer. The solid electrolyte layer contains an electrically conductive material, and an additive. The conductive material contains a &#x3c0;-conjugated polymer, and a polymer dopant doped in the &#x3c0;-conjugated polymer and having a first anionic group. The additive includes a quinone compound having a second anionic group.

Electrolytic capacitor and manufacturing method of electrolytic capacitor

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 one of an acid component, a nitro compound, or 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. 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.

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.

Electrolytic capacitor and method for manufacturing electrolytic capacitor

A conductive polymer microparticle dispersion contains a solvent, and polythiophene microparticles dispersed in the solvent. The polymerization unit of the polythiophene is one of thiophene and derivatives thereof, and the polythiophene contains a polyanion as a dopant. The conductive polymer microparticle dispersion has a pH value of 3 or greater and contains a solvent-insoluble iron compound containing iron with a concentration of 450 ppm or less.

Conductive polymer particle dispersion, electrolytic capacitor using same, and method of producing these

A dispersion liquid including one of thiophene and derivatives thereof, a polyanion, and a solvent is prepared. The dispersion liquid is mixed with a first oxidizing agent producing iron ions so as to oxidatively polymerize the one of thiophene and derivatives thereof. At the completion of the polymerization, the conductive polymer microparticle dispersion contains trivalent iron ions with a concentration of 3 to 30 parts by weight, inclusive, with respect to 100 parts by weight of the conductive polymer microparticle.

Method of producing conductive polymer particle dispersion, and method of producing electrolytic capacitor using conductive polymer particle dispersion

At least one monomer selected from thiophenes and their derivatives is oxidatively polymerized with an oxidizing agent in a solvent mainly composed of water in the presence of a polyanion as a dopant. This conductive polymer microparticle dispersion is manufactured by using, as the polyanion, a polystyrene sulfonic acid and/or its salt each having a Hazen color number in the range of 10 to 1000, inclusive, when the hue of a 2% aqueous solution thereof is measured by the APHA method.

Method of manufacturing conductive polymer microparticle dispersion and method of manufacturing electrolytic capacitor containing the conductive polymer microparticle dispersion

A dispersion liquid including one of thiophene and derivatives thereof, a polyanion, and a solvent is prepared. Then, the dispersion liquid is mixed with an oxidizing agent so as to oxidatively polymerize the one of thiophene and derivatives thereof. During the oxidative polymerization, a temperature of the dispersion liquid is 35&#xb0; C. or less and a dissolved oxygen concentration of the dispersion liquid is 7 ppm or less.

Method of producing conductive polymer particle dispersion, and method of producing electrolytic capacitor using said conductive polymer particle dispersion

A solid electrolytic capacitor including a positive electrode including a sintered body of metal particles of tantalum or an alloy of tantalum, a dielectric layer formed on a surface of the positive electrode; and an electrolyte layer formed on the dielectric layer. A CV value (a value of product of capacitance and voltage) of the metal particles is 100000 &#x3bc;F&#xb7;V/g or more. The positive electrode includes a surface region and an interior region, the surface region is configured by an outer surface of the positive electrode and a vicinity of the outer surface, and the interior region is an inner part of the positive electrode surrounded by the surface region. An average film thickness of the dielectric layer in the surface region is thicker than an average film thickness of the dielectric layer in the interior region.

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Takatsuki, Japan

Kazuhiro Takatani