Panasonic Intellectual Property Management Co., Ltd.

Katsuya Miyahara

Hiroshi Kojima

Youichirou Uka

An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, and a conductive polymer layer covering at least a part of the dielectric layer. The conductive polymer layer includes a conductive polymer and a polymer dopant. The polymer dopant includes a copolymer that includes a first monomer unit and a second monomer unit. The first monomer unit has a sulfonate group. Time second monomer unit has a functional group represented by a formula (i); &#x2014;CO&#x2014;R&#x2014;COOH (where Rrepresents an aliphatic hydrocarbon group having 1 to 8 carbon atoms, an aromatic group, or a divalent group &#x2014;OR&#x2014;, Rrepresenting an aliphatic hydrocarbon group having 1 to 8 carbon atoms or an aromatic group).

Electrolytic capacitor including conductive polymer with copolymer dopant and conductive polymer dispersion

An electrolytic capacitor includes an anode body, a first conductive polymer layer, and a second conductive polymer layer. The anode body includes a dielectric layer. The first conductive polymer layer covers at least a part of the dielectric layer. The second conductive polymer layer covers at least a part of the first conductive polymer layer. The first conductive polymer layer includes a first conductive polymer. The second conductive polymer layer includes a second conductive polymer. At least one of the first conductive polymer layer and the second conductive polymer layer further includes a hydroxy compound. The hydroxy compound has two or more alcoholic hydroxy groups or two or more phenolic hydroxy groups, and has a melting point ranging from 40&#xb0; C. to 150&#xb0; C., inclusive.

Electrolytic capacitor including hydroxy compound and manufacturing method therefor

An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, and a conductive polymer layer covering at least a part of the dielectric layer. The conductive polymer layer includes a conductive polymer and a polymer dopant. The polymer dopant includes a first copolymer including: (A) a first unit derived from a first monomer having a sulfonate group; (B) a second unit derived from a second monomer having a carboxy group; and (C) a third unit derived from a third monomer having a hydroxy group.

Electrolytic capacitor and conductive polymer dispersion

An electrolytic capacitor includes an anode body having a dielectric layer, a first conductive polymer layer covering at least a part of the dielectric layer, and a second conductive polymer layer covering at least a part of the first conductive polymer layer. The first conductive polymer layer includes a first conductive polymer and a first polymer dopant having a sulfonate group. The second conductive polymer layer includes a second conductive polymer and a second polymer dopant having a sulfonate group. A polymerization degree of the first conductive polymer is lower than a polymerization degree of the second conductive polymer.

Electrolytic capacitor and production method for same

An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, a first conductive polymer layer covering at least a part of the dielectric layer, and a second conductive polymer layer covering at least a part of the first conductive polymer layer. The first conductive polymer layer includes a first conductive polymer. The second conductive polymer layer includes a second conductive polymer. The first conductive polymer layer and the second conductive polymer layer each further include a first polymer dopant having a sulfonation degree of S. At least one of the first conductive polymer layer and the second conductive polymer layer further includes a second polymer dopant having a sulfonation degree of S. The sulfonation degree of Sand the sulfonation degree of Ssatisfy a relation of S&#x3c;S.

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Osaka, Japan

Katsuya Miyahara