# US 2017/0256362 A1 · Electrolytic capacitor and method for manufacturing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0256362 A1 - Document ID: US20170256362A1 - Status: Published application - Kind: A1 - Application number: 15/597,178 - Filed: 2017-05-17 - Published: 2017-09-07 - Earliest claimed: 2014-12-01 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: YUICHIRO TSUBAKI - Web page: https://patentgrep.com/patent/US20170256362A1 ## CPC - H01G 9/0036: {Formation of the solid electrolyte layer} - H01G 9/028: Organic semiconducting electrolytes, e.g. TCNQ - H01G 9/151: {with wound foil electrodes} - 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) ## Abstract An electrolytic capacitor includes an anode body having a dielectric layer, and a solid electrolyte layer including a conductive polymer. The solid electrolyte layer includes the conductive polymer, an anion, and a cation. The anion is an anion corresponding to at least one acid selected from the group consisting of a phosphorus-containing oxoacid, sulfuric acid, and a carboxylic acid. The cation is a nitrogen-containing cation. ## Claims ### Claim 1 An electrolytic capacitor comprising: an anode body having a dielectric layer; and a solid electrolyte layer including a conductive polymer, wherein: the solid electrolyte layer includes the conductive polymer, an anion, and a cation, the anion is an anion corresponding to at least one acid selected from the group consisting of a phosphorus-containing oxoacid, sulfuric acid, and a carboxylic acid, and the cation is a nitrogen-containing cation. ### Claim 2 (depends on 1) The electrolytic capacitor according to claim 1, wherein the phosphorus-containing oxoacid includes phosphoric acid. ### Claim 3 (depends on 1) The electrolytic capacitor according to claim 1, wherein the nitrogen-containing cation is a cation derived from at least one nitrogen-containing base selected from the group consisting of ammonia and an amine. ### Claim 4 (depends on 1) The electrolytic capacitor according to claim 1, wherein the anion and the cation form a salt. ### Claim 5 (depends on 4) The electrolytic capacitor according to claim 4, wherein the salt is at least one selected from the group consisting of ammonium phosphate, diammonium hydrogen phosphate, and ammonium dihydrogen phosphate. ### Claim 6 (depends on 1) The electrolytic capacitor according to claim 1, wherein in the solid electrolyte layer, a content of the anion ranges from 0.1 parts by mass to 100 parts by mass, both inclusive, relative to 100 parts by mass of the conductive polymer in terms of the at least one acid that is free. ### Claim 7 (depends on 1) The electrolytic capacitor according to claim 1, wherein the solid electrolyte layer includes the cation and the anion in a ratio of 1 equivalent or more of the anion to 1 equivalent of the cation. ### Claim 8 (depends on 1) The electrolytic capacitor according to claim 1, the electrolytic capacitor further comprising an electrolyte solution. ### Claim 9 A method for manufacturing an electrolytic capacitor, the method comprising impregnating an anode body having a dielectric layer with a dispersion containing a conductive polymer, a solvent, an anion, and a cation, wherein: the anion is an anion corresponding to at least one acid selected from the group consisting of a phosphorus-containing oxoacid, sulfuric acid, and a carboxylic acid, and the cation is a nitrogen-containing cation. ### Claim 10 A method for manufacturing an electrolytic capacitor, the method comprising: impregnating an anode body having a dielectric layer with a dispersion containing a conductive polymer and a solvent; and impregnating the anode body impregnated by the dispersion with a treatment solution containing an anion and a cation, wherein: the anion is an anion corresponding to at least one acid selected from the group consisting of a phosphorus-containing oxoacid, sulfuric acid, and a carboxylic acid, and the cation is a nitrogen-containing cation. ### Claim 11 (depends on 9) The method for manufacturing an electrolytic capacitor according to claim 9, wherein the phosphorus-containing oxoacid includes phosphoric acid. ### Claim 12 (depends on 9) The method for manufacturing an electrolytic capacitor according to claim 9, wherein the nitrogen-containing cation is a cation derived from at least one nitrogen-containing base selected from the group consisting of ammonia and an amine. ### Claim 13 (depends on 9) The method for manufacturing an electrolytic capacitor according to claim 9, wherein the anion and the cation form a salt. ### Claim 14 (depends on 13) The method for manufacturing an electrolytic capacitor according to claim 13, wherein the salt is at least one selected from the group consisting of ammonium phosphate, diammonium hydrogen phosphate, and ammonium dihydrogen phosphate. ### Claim 15 (depends on 9) The method for manufacturing an electrolytic capacitor according to claim 9, wherein an amount of the anion ranges from 0.1 parts by mass to 100 parts by mass, both inclusive, relative to 100 parts by mass of the conductive polymer in terms of the at least one acid that is free. ### Claim 16 (depends on 9) The method for manufacturing an electrolytic capacitor according to claim 9, wherein the solvent contains a polyhydric alcohol. ### Claim 17 (depends on 10) The method for manufacturing an electrolytic capacitor according to claim 10, wherein the treatment solution further contains a polyhydric alcohol. ### Claim 18 (depends on 9) The method for manufacturing an electrolytic capacitor according to claim 9, the method further comprising impregnating the anode body with an electrolyte solution after impregnating the anode body with the dispersion. ### Claim 19 (depends on 10) The method for manufacturing an electrolytic capacitor according to claim 10, the method further comprising impregnating the anode body with an electrolyte solution after impregnating the anode body with the treatment solution.