Rubycon Corporation

Yosuke Nozawa

Yoshishige Sakurai

Masayuki Sakaguchi

Akira Iijima

Tetsushi Ogawara

Akihiko Komatsu

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, Rrepresents hydrogen, an alkyl group, a hydroxyalkyl group, or an alkoxyalkyl group. R, R, R, and Reach independently represent hydrogen, an alkyl group, a hydroxy group, a hydroxyalkyl group, an alkoxy group, or an alkoxyalkyl group. The ends of Rand Rmay be bonded to each other to form a ring. The ends of Rand Rmay be bonded to each other to form a ring.

Solid electrolytic capacitor including electrolytic solution containing acid and amine, and method for manufacturing same

A solid electrolytic capacitor includes a solid electrolyte and an electrolyte between electrode foils, and a method for manufacturing the solid electrolytic capacitor can suppress a rise in ESR and realize a longer life. As a solution, in a solid electrolytic capacitor, a basic component of an electrolytic solution contains an amine represented by formula (1). In the formula, Rrepresents hydrogen or an alkyl group, Rrepresents an alkylene group, Rrepresents an alkyl group. n represents an integer of 1 to 100, wherein R's may be the same or different when n is 2 or more. m represents an integer of 1 to 3, wherein R's may be the same or different when m is 1, and when m is 2 or 3, R's may be the same or different, n's may be the same or different, and R's may be the same or different.NR(—(RO)—R)  (1)

Solid electrolytic capacitor containing oxygen-containing amine without hydroxy group and method for manufacturing same

A solid electrolytic capacitor () includes an anode foil () having formed thereon an oxide film, a cathode foil (), and a separator (), and is equipped with a solid electrolyte () formed of an electroconductive polymer compound in a fine particle form, and a water-soluble compound solution () introduced to surround the solid electrolyte (), the solid electrolyte () contains a polyol compound having a molecular weight of less than 200 and a number of hydroxy groups of 4 or more as a first water-soluble compound (), the water-soluble compound solution () contains one kind or multiple kinds of a glycol compound in a liquid form as a second water-soluble compound (), and the second water-soluble compound () has an average molecular weight of less than 400.

Solid electrolytic capacitor with small equivalent series resistance and method for manufacturing the same

To provide an electrolytic capacitor having a configuration that achieves a low impedance by increasing the content of water, satisfies a withstand voltage of 400 V or more, and is capable of enhancing the long-term reliability. Provided as a solution is an electrolytic capacitor () including an electrolytic solution () containing ethylene glycol, 10 to 30% by mass of water, and 1 to 12% by mass of an amine salt of a carboxylic acid, having added thereto 0.01 to 2% by mass of one or more kind of ammonium hypophosphite, an amine salt of hypophosphorous acid, and hypophosphorous acid, the carboxylic acid being a polycarboxylic acid having a chain hydrocarbon skeleton and a molecular weight of 140 to 500.

Electrolytic capacitor for high withstand voltage

A solid electrolytic capacitor includes: an anode foil on which an oxide film is formed; a cathode foil; and a separator between the anode and cathode foils, wherein a solid electrolyte in a fine particle form made of a conductive high molecular weight compound and a water-soluble high-molecular weight compound in a liquid form are introduced into a gap between the anode and cathode foils in a state where the water-soluble high-molecular weight compound in a liquid form surrounds the solid electrolyte, and a ratio of an area that the solid electrolyte occupies in the gap is set to a value which falls within a range of 1 vol % to 30 vol %, and a ratio of an area that the water-soluble high-molecular weight compound in a liquid form occupies in the gap is set to a value which falls within a range of 10 vol % to 99 vol %.

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Nagano, Japan

Yosuke Nozawa