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公开(公告)号：US12300445B2
公开(公告)日：2025-05-13
申请号：US18246089
申请日：2021-09-24
Inventor： Yuichiro Tsubaki , Kazuyo Saito , Tatsuji Aoyama
Abstract: An electrolytic capacitor includes a capacitor element and a liquid component, wherein the capacitor element includes an anode body having a dielectric layer on a surface thereof, and a conductive polymer compound covering at least a portion of the dielectric layer. The liquid component includes an acid component, a base component, a solvent, and an antioxidant. The solvent includes water and a polyol compound. The acid component includes a coordination compound including a central atom, and an organic molecule having a plurality of coordination atoms bonded to the central atom, and at least one of the plurality of coordination atoms is an oxygen atom bonded to a carbonyl group.
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公开(公告)号：US12266481B2
公开(公告)日：2025-04-01
申请号：US17813940
申请日：2022-07-21
Inventor： Tatsuji Aoyama , Yuji Otsuka , Tomoyuki Tashiro , Kenta Chashiro , Yuichiro Tsubaki
Abstract: A method for producing an electrolytic capacitor includes: preparing an anode foil, a cathode foil, and a fibrous structure, the anode foil having a porous portion including a dielectric layer; preparing a conductive polymer-containing liquid, the conductive polymer-containing liquid containing a conductive polymer component and a first solvent;
forming a separator by removing at least a part of the first solvent after applying the conductive polymer-containing liquid to the fibrous structure; forming a capacitor element from the anode foil, the separator, and the cathode foil; and impregnating the capacitor element with an electrolytic solution. An electrical conductivity of the electrolytic solution at 30° C. is 3.0 mS/cm or more.-
公开(公告)号：US11935704B2
公开(公告)日：2024-03-19
申请号：US17884290
申请日：2022-08-09
Inventor： Yuichiro Tsubaki , Kazuyo Saito , Tatsuji Aoyama
Abstract: An electrolytic capacitor includes an anode body having a dielectric layer disposed on a surface of the anode body, a solid electrolyte layer that is in contact with the dielectric layer, and an electrolytic solution. The solid electrolyte layer includes a conductive polymer. The electrolytic solution contains a first base component, a first acid component, and a second acid component. The first base component includes an amidine compound. The first acid component includes a composite compound of an inorganic acid and an organic acid. The second acid component includes at least one selected from a group consisting of boric acid, phosphoric acid, phosphorous acid, hypophosphorous acid, and phosphonic acid.
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公开(公告)号：US20230109930A1
公开(公告)日：2023-04-13
申请号：US18045654
申请日：2022-10-11
Inventor： Yuichiro Tsubaki , Tatsuji Aoyama
Abstract: An electrolytic capacitor includes an anode body having a dielectric layer; a solid electrolyte layer in contact with the dielectric layer of the anode body; and an electrolytic solution. The electrolytic solution contains a solvent and a solute. The solvent contains a glycol compound. The solute contains an acid component and a base component. A mass of the acid component in the solute is greater than a mass of the base component in the solute. The acid component contains a first aromatic compound having a hydroxyl group.
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公开(公告)号：US11508530B2
公开(公告)日：2022-11-22
申请号：US17155644
申请日：2021-01-22
Inventor： Yuichiro Tsubaki , Tatsuji Aoyama
Abstract: An electrolytic capacitor includes an anode body having a dielectric layer; a solid electrolyte layer in contact with the dielectric layer of the anode body; and an electrolytic solution. The electrolytic solution contains a solvent and a solute. The solvent contains a glycol compound. The solute contains an acid component and a base component. A mass of the acid component in the solute is greater than a mass of the base component in the solute. The acid component contains a first aromatic compound having a hydroxyl group.
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Patent Agency Ranking
公开(公告)号：US11456120B2
公开(公告)日：2022-09-27
申请号：US16706615
申请日：2019-12-06
Inventor： Yuichiro Tsubaki , Kazuyo Saito , Tatsuji Aoyama
Abstract: An electrolytic capacitor includes an anode body, a cathode body, and a conductive polymer and a liquid component that are disposed between the anode body and the cathode body. The liquid component contains an acid component, a base component, and an aromatic additive. The acid component includes at least one of an aromatic carboxylic acid and an aromatic carboxylic acid derivative. The at least one of the aromatic carboxylic acid and the aromatic carboxylic acid derivative includes at least two carboxy groups and at least one aromatic ring. A content proportion of the base component in the liquid component is more than or equal to 1% by mass. The aromatic additive includes an electron withdrawing group and an electron donating group. A content ratio of the aromatic additive contained in the liquid component is more than or equal to 50 parts by mass with respect to 100 parts by mass of the conductive polymer.
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公开(公告)号：US10984960B2
公开(公告)日：2021-04-20
申请号：US15986455
申请日：2018-05-22
Inventor： Yuichiro Tsubaki , Tatsuji Aoyama
IPC: H01G11/04 , H01G9/035 , H01G11/60 , H01G11/80 , H01G11/56 , H01G9/10 , H01G9/028 , H01G9/15 , H01G11/86 , H01G9/145
Abstract: An electrolytic capacitor includes a capacitor element, a liquid component, an outer case, and a sealing body. The capacitor element includes an anode body having a dielectric layer, and a solid electrolyte layer in contact with the dielectric layer. The liquid component is in contact with the solid electrolyte layer. The outer case houses the capacitor element and the liquid component. The sealing body seals an opening of the outer case. The liquid component contains a first component, which is an aliphatic polyol compound having two or more hydroxy groups per molecule. The aliphatic polyol compound includes at least one of a compound having a C3 carbon chain in a main chain and a compound having no C3 carbon chain but having one to four ether oxygen atoms in a main chain. The sealing body includes a polymer having no double bond in a main chain.
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公开(公告)号：US12205774B2
公开(公告)日：2025-01-21
申请号：US17810618
申请日：2022-07-04
Inventor： Kazuyo Saito , Yuichiro Tsubaki , Tatsuji Aoyama
Abstract: An electrolytic capacitor includes a capacitor element and a liquid component. The capacitor element includes an anode body that includes a dielectric layer on a surface of the anode body and a conductive polymer that covers a part of the dielectric layer. The liquid component includes a first solvent and a polyalkylene glycol component. The first solvent contains at least a glycerin component.
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公开(公告)号：US11978597B2
公开(公告)日：2024-05-07
申请号：US17783125
申请日：2020-12-08
Inventor： Yuichiro Tsubaki , Tatsuji Aoyama , Kazuyo Saito , Liyi Chen , Kengo Uchihashi
Abstract: A liquid component for an electrolytic capacitor includes at least one central atom selected from the group consisting of boron, aluminum, and silicon, and a ligand having a plurality of ligand atoms bonded to the central atom. The ligand atoms are at least one selected from the group consisting of oxygen and nitrogen, and are bonded to a carbon atom having no oxo group.
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公开(公告)号：US11195664B2
公开(公告)日：2021-12-07
申请号：US16810105
申请日：2020-03-05
Inventor： Kazuyo Saito , Yuichiro Tsubaki , Tatsuji Aoyama
Abstract: An electrolytic capacitor includes a capacitor element and an electrolytic solution. The capacitor element includes an anode body with an oxide film, and a solid electrolyte in contact with 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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