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公开(公告)号：US12131872B2
公开(公告)日：2024-10-29
申请号：US17756542
申请日：2020-12-22
摘要： An electrolytic capacitor includes at least one capacitor element. The at least one capacitor element includes: an anode body including an anode lead portion, and a cathode forming portion; a dielectric layer disposed on at least a surface of the cathode forming portion of the anode body; and a cathode part covering at least a part of the dielectric layer. The cathode part includes a solid electrolyte layer that contains a conductive polymer, and covers at least a part of the dielectric layer. A ratio T1/T2 of a thickness T1 of the solid electrolyte layer formed at a corner portion of the anode body to a thickness T2 of the solid electrolyte layer formed at a center portion of a principal surface of the anode body is in a range from 0.8 to 1.7, inclusive, in a cross section of the at least one capacitor element.
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公开(公告)号：US12112899B2
公开(公告)日：2024-10-08
申请号：US18208788
申请日：2023-06-12
发明人： Kazuyo Saito , Yuichiro Tsubaki , Tatsuji Aoyama
摘要： An electrolytic capacitor includes a capacitor element and electrolytic solution. The capacitor element includes an anode body with an oxide film, and a solid electrolyte contacting the oxide film. The electrolytic solution contains a solvent and a solute. The solvent contains at least one selected from the group consisting of a lactone compound, a glycol compound, and a sulfone compound. The solute includes a first acid component and a base component. The first acid component includes at least one of a benzenedicarboxylic acid and a derivative of the benzenedicarboxylic acid. The base component includes at least one of an amine and an amidine. A concentration of the solute in the electrolytic solution ranges from 15% by mass to 40% by mass, inclusive. A ratio (V/Vw) of a formation voltage V of the oxide film to a rated voltage Vw of the electrolytic capacitor is less than or equal to 1.7.
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公开(公告)号：US20240266120A1
公开(公告)日：2024-08-08
申请号：US18685528
申请日：2022-08-23
发明人： Kenji KAKUMA
摘要： A capacitor element has a water-soluble first polymer disposed on the surfaces of anode and cathode members and a water-dispersible second polymer disposed on the surfaces of the anode and cathode members on which the first polymer is disposed. The second polymer electrically connects together the anode and cathode members. Between the surfaces of the anode and cathode members and between the inner face of a case and the outer face of the capacitor element, a solid-at-normal-temperature substance is disposed that has an electrolyte dissolved in a solvent that is solid at or below a first temperature and that melts when heated to or above a second temperature higher than the first temperature.
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公开(公告)号：US12057276B2
公开(公告)日：2024-08-06
申请号：US17794411
申请日：2021-01-20
发明人： Kenta Sato , Ippei Nakamura , Masao Sakakura
CPC分类号： H01G9/15 , H01G9/0036 , H01G9/028 , H01G9/035
摘要： A hybrid-type solid electrolytic capacitor which suppresses corrosive reaction even if chlorine ions are contaminated while suppressing deterioration of product characteristics. The solid electrolytic capacitor includes a capacitor element including an anode foil and a cathode foil facing each other and an electrolyte layer formed in the capacitor element. The electrolyte layer includes a solid electrolyte layer including a dopant and a conjugated polymer, and an electrolyte solution filled in air gaps in the capacitor element on which the solid electrolyte layer is formed. The electrolyte layer includes a cation component at a molecular ratio of 6 or less relative to 1 mol of a functional group which can contribute to a doping reaction of the dopant, and the electrolytic solution includes a sulfolane-based solvent.
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公开(公告)号：US11955294B2
公开(公告)日：2024-04-09
申请号：US16709975
申请日：2019-12-11
申请人： AVX Corporation
发明人： Miloslav Uher , Kiyofumi Aoki , Pavel Kucharczyk
摘要： A solid electrolytic capacitor containing a capacitor element is provided. The capacitor element contains a sintered porous anode body, a dielectric that overlies the anode body, a solid electrolyte that overlies the dielectric, and an external coating that overlies the solid electrolyte and includes conductive polymer particles. The solid electrolyte includes a conductive polymer containing repeating thiophene units of a certain formula.
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公开(公告)号：US20240055191A1
公开(公告)日：2024-02-15
申请号：US18258296
申请日：2022-01-12
发明人： KEI HIROTA , TAKAHIRO YOSHII
CPC分类号： H01G9/028 , H01G9/15 , H01G9/0036
摘要： A solid electrolytic capacitor element includes an anode body, a dielectric layer formed on a surface of the anode body, and a cathode part covering at least a part of the dielectric layer. The cathode part includes a solid electrolyte layer covering the at least the part of the dielectric layer. The solid electrolyte layer includes a conductive polymer component containing a conjugated polymer. An oxygen permeability P1 of the solid electrolyte layer after heating at 230° C. for 5 hours is less than or equal to 1.0 cm3/m2·24 h·atm.
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公开(公告)号：US11756739B2
公开(公告)日：2023-09-12
申请号：US17688359
申请日：2022-03-07
发明人： Yuichiro Tsubaki , Tatsuji Aoyama , Kazuyo Saito , Yuji Otsuka
摘要： An electrolytic capacitor includes a capacitor element and an electrolytic solution. The capacitor element includes: an anode body including a dielectric layer; a cathode body; and a solid electrolyte in contact with the dielectric layer. The electrolytic solution includes a solvent, a solute, and a polymer component. The solvent includes an ethylene glycol compound. The polymer component includes polyalkylene glycol. The polyalkylene glycol includes at least one of (i) a mixture of polyoxyethylene and polyoxypropylene and (ii) an oxyethylene-oxypropylene copolymer. In the polyalkylene glycol, a molar ratio m/n of oxyethylene units to oxypropylene units is greater than 1.
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公开(公告)号：US11749464B2
公开(公告)日：2023-09-05
申请号：US17262929
申请日：2019-07-26
发明人： Yuichiro Tsubaki , Daisuke Kubo , Tatsuji Aoyama
摘要： An electrolytic capacitor according to the present disclosure includes an anode body, a cathode body, a solid electrolyte, and a liquid component. The anode body has a surface provided with a dielectric layer. The solid electrolyte is in contact with the dielectric layer, is disposed between the anode body and the cathode body and contains conductive polymer. The liquid component is in contact with the dielectric layer and the solid electrolyte and contains a solvent and an acid component. The acid component contains a first polymer acid component including a sulfonic acid group or a carboxylic acid group.
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公开(公告)号：US20230029692A1
公开(公告)日：2023-02-02
申请号：US17786082
申请日：2020-12-15
发明人： Kazuya KOSEKI , Kazuhiro NAGAHARA , Kazuma OKURA
摘要： Provided is a solid electrolytic capacitor having large capacitance, low ESR, and superior high-frequency characteristics and high-temperature endurance. The solid electrolytic capacitor is provided with: a cathode 10 having a cathode substrate 11 made of a valve metal and having an etching pit 11a; an oxide layer 12 made of an oxide of the valve metal provided on a surface of the cathode substrate 11, and a carbon coating layer 13 provided on a surface of the oxide layer 12, the carbon coating layer 13 including carbon particles and having an entry area 13a that enters the etching pit 11a and a penetration area 13b that penetrates through the oxide layer 12 and conducts with the cathode substrate 11; an anode having an anode substrate made of a valve metal, and a dielectric layer provided on a surface of the anode substrate and made of an oxide of the valve metal that composes the anode substrate; and a solid electrolyte layer including a conductive polymer provided between the carbon coating layer of the cathode and the dielectric layer of the anode.
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公开(公告)号：US11545306B2
公开(公告)日：2023-01-03
申请号：US16973669
申请日：2018-07-26
发明人： Kenji Kakuma
摘要： In an electrolytic capacitor having a capacitor element housed inside a body case where the capacitor element has a first electrode member and a second electrode member wound up with a separator in between and where the capacitor element holding an electrolyte solution, there is provided, between the first and second electrode members, a conductive polymer particle band in which conductive polymer particles of a conductive polymer in a dense state are disposed to extend in the longitudinal direction of the separator, the conductive polymer particle band contains a cellulose derivative, and the conductive polymer particle band is provided to cover, within at least one of regions on opposite sides of the center line of the separator in its lateral direction, one half or more of the region in the lateral direction.
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