# US 10,373,763 B2 · Electrolytic Capacitor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,373,763 B2 - Document ID: US10373763B2 - Status: Granted - Kind: B2 - Application number: 15/872,948 - Filed: 2018-01-16 - Published: 2018-06-07 - Granted: 2019-08-06 - Earliest claimed: 2015-07-29 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Yuichiro Tsubaki; Tatsuji Aoyama - Web page: https://patentgrep.com/patent/US10373763B2 ## CPC - H01G 9/035: Liquid electrolytes, e.g. impregnating materials (H01G11/54 takes precedence) - C08K 5/053: Polyhydroxylic alcohols - C08K 5/092: Polycarboxylic acids - C08L 71/02: Polyalkylene oxides - H01G 9/0036: {Formation of the solid electrolyte layer} - H01G 9/008: Terminals - H01G 9/025: Solid electrolytes (H01G11/54 takes precedence) - H01G 9/028: Organic semiconducting electrolytes, e.g. TCNQ - H01G 9/07: Dielectric layers - H01G 9/145: Liquid electrolytic capacitors (H01G11/00 takes precedence) - C08G 61/126: {with a five-membered ring containing one sulfur atom in the ring} - C08G 2261/1424: containing ether groups, including alkoxy - C08G 2261/3223: containing one or more sulfur atoms as the only heteroatom, e.g. thiophene - C09D 165/00: Coating compositions based on macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C09D107/00 - C09D157/00, C09D161/00 take precedence); Coating compositions based on derivatives of such polymers - H01G 9/15: Solid electrolytic capacitors (H01G11/00 takes precedence) - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) ## Abstract An electrolytic capacitor includes: an anode body having a dielectric layer; a solid electrolyte layer in contact with the dielectric layer; and an electrolytic solution. The electrolytic solution contains a solvent and a solute. The solvent contains a glycol compound. The solute contains a carboxylic acid component and a base component. A ratio of the carboxylic acid component in the solute is 200 parts by mass or more with respect to 100 parts by mass of the base component. ## Claims ### Claim 1 An electrolytic capacitor comprising: 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, wherein: the electrolytic solution contains a solvent and a solute, the solvent contains a glycol compound, the solute contains a carboxylic acid component and a base component, a ratio of the carboxylic acid component in the solute is 200 parts by mass or more with respect to 100 parts by mass of the base component, and a proportion of the solute contained in the electrolytic solution ranges from 2% by mass to 30% by mass, inclusive. ### Claim 2 (depends on 1) The electrolytic capacitor according to claim 1, wherein the electrolytic solution has a pH of 4 or less. ### Claim 3 (depends on 1) The electrolytic capacitor according to claim 1, wherein a proportion of the glycol compound contained in the solvent is 50% by mass or more. ### Claim 4 (depends on 1) The electrolytic capacitor according to claim 1, wherein the glycol compound contains ethylene glycol. ### Claim 5 (depends on 1) The electrolytic capacitor according to claim 1, wherein a part of the carboxylic acid component is derived from a salt of the carboxylic acid component and the base component. ### Claim 6 (depends on 1) The electrolytic capacitor according to claim 1, wherein the base component is at least one selected from the group consisting of a primary amine, a secondary amine, and a tertiary amine. ### Claim 7 (depends on 1) The electrolytic capacitor according to claim 1, wherein the solute further contains an aromatic compound containing two or more hydroxyl groups. ### Claim 8 (depends on 7) The electrolytic capacitor according to claim 7, wherein the aromatic compound containing two or more hydroxyl groups is at least one selected from the group consisting of catechol and pyrogallol. ### Claim 9 (depends on 1) The electrolytic capacitor according to claim 1, wherein the carboxylic acid component contains an aromatic compound containing two or more carboxyl groups. ### Claim 10 (depends on 9) The electrolytic capacitor according to claim 9, wherein the aromatic compound containing two or more carboxyl groups is at least one selected from the group consisting of o-phthalic acid and pyromellitic acid. ### Claim 11 (depends on 1) The electrolytic capacitor according to claim 1, wherein the solid electrolyte layer is formed by impregnating the dielectric layer with a polymer dispersion containing a liquid component and a conductive polymer dispersed in the liquid component, forming a film that covers at least a part of the dielectric layer, and then volatilizing the liquid component from the film. ### Claim 12 (depends on 1) The electrolytic capacitor according to claim 1, wherein a ratio of the carboxylic acid component in the solute is 600 parts by mass or more with respect to 100 parts by mass of the base component. ### Claim 13 (depends on 1) The electrolytic capacitor according to claim 1, wherein the solvent further contains tri-or-more-hydric alcohol. ### Claim 14 (depends on 13) The electrolytic capacitor according to claim 13, wherein the tri-or-more hydric alcohol contains a glycerin. ### Claim 15 (depends on 1) The electrolytic capacitor according to claim 1, wherein the glycol compound contains at least one selected from the group consisting of diethylene glycol, triethylene glycol, propylene glycol, polyethylene glycol which has an average molecular weight ranging from 190 to 400, inclusive. ### Claim 16 An electrolytic capacitor comprising: 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, wherein: the electrolytic solution contains a solvent and a solute, the solvent contains a glycol compound, the solute contains a carboxylic acid component and a base component, a ratio of the carboxylic acid component in the solute is 200 parts by mass or more with respect to 100 parts by mass of the base component, and a part of the carboxylic acid component is derived from a salt of the carboxylic acid component and the base component. ### Claim 17 (depends on 16) The electrolytic capacitor according to claim 16, wherein the electrolytic solution has a pH of 4 or less. ### Claim 18 (depends on 16) The electrolytic capacitor according to claim 16, wherein a proportion of the glycol compound contained in the solvent is 50% by mass or more. ### Claim 19 (depends on 16) The electrolytic capacitor according to claim 16, wherein the glycol compound contains ethylene glycol. ### Claim 20 (depends on 16) The electrolytic capacitor according to claim 16, wherein the base component is at least one selected from the group consisting of a primary amine, a secondary amine, and a tertiary amine. ### Claim 21 (depends on 16) The electrolytic capacitor according to claim 16, wherein the solute further contains an aromatic compound containing two or more hydroxyl groups. ### Claim 22 (depends on 21) The electrolytic capacitor according to claim 21, wherein the aromatic compound containing two or more hydroxyl groups is at least one selected from the group consisting of catechol and pyrogallol. ### Claim 23 (depends on 16) The electrolytic capacitor according to claim 16, wherein the carboxylic acid component contains an aromatic compound containing two or more carboxyl groups. ### Claim 24 (depends on 23) The electrolytic capacitor according to claim 23, wherein the aromatic compound containing two or more carboxyl groups is at least one selected from the group consisting of o-phthalic acid and pyromellitic acid. ### Claim 25 (depends on 16) The electrolytic capacitor according to claim 16, wherein the solid electrolyte layer is formed by impregnating the dielectric layer with a polymer dispersion containing a liquid component and a conductive polymer dispersed in the liquid component, forming a film that covers at least a part of the dielectric layer, and then volatilizing the liquid component from the film. ### Claim 26 (depends on 16) The electrolytic capacitor according to claim 16, wherein a ratio of the carboxylic acid component in the solute is 600 parts by mass or more with respect to 100 parts by mass of the base component. ### Claim 27 (depends on 16) The electrolytic capacitor according to claim 16, wherein the solvent further contains tri-or-more-hydric alcohol. ### Claim 28 (depends on 27) The electrolytic capacitor according to claim 27, wherein the tri-or-more hydric alcohol contains a glycerin. ### Claim 29 (depends on 16) The electrolytic capacitor according to claim 16, wherein the glycol compound contains at least one selected from the group consisting of diethylene glycol, triethylene glycol, propylene glycol, polyethylene glycol which has an average molecular weight ranging from 190 to 400, inclusive.