# US 10,370,485 B2 · Method for producing conductive polymer and method for producing solid electrolyte capacitor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,370,485 B2 - Document ID: US10370485B2 - Status: Granted - Kind: B2 - Application number: 15/795,880 - Filed: 2017-10-27 - Published: 2018-02-22 - Granted: 2019-08-06 - Earliest claimed: 2012-07-25 - Assignees: Showa Denko K.K. - Applicants: Showa Denko K.K. - Inventors: Kazumi Naito; Shoji Yabe - Web page: https://patentgrep.com/patent/US10370485B2 ## CPC - C08G 61/126: {with a five-membered ring containing one sulfur atom in the ring} - C08G 61/124: {with a five-membered ring containing one nitrogen atom in the ring} - C25B 3/00: Electrolytic production of organic compounds - C25B 3/01: Products - C25B 3/05: Heterocyclic compounds - C25B 3/07: Oxygen containing compounds - C25B 3/09: Nitrogen containing compounds - C25D 9/02: with organic materials - C25D 11/20: Electrolytic after-treatment - H01G 9/0036: {Formation of the solid electrolyte layer} - H01G 9/028: Organic semiconducting electrolytes, e.g. TCNQ - C08G 2261/11: Homopolymers - C08G 2261/18: conjugated - C08G 2261/3221: containing one or more nitrogen atoms as the only heteroatom, e.g. pyrrole, pyridine or triazole - C08G 2261/3223: containing one or more sulfur atoms as the only heteroatom, e.g. thiophene - C08G 2261/3247: containing combinations of different heteroatoms other than nitrogen and oxygen or nitrogen and sulfur - C08G 2261/44: Electrochemical polymerisation, i.e. oxidative or reductive coupling - C08G 2261/51: Charge transport - C08G 2261/90: Applications - H01G 9/15: Solid electrolytic capacitors (H01G11/00 takes precedence) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C25B: ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR (anodic or cathodic protection C23F13/00; single-crystal growth C30B) - C25D: PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR - 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 A solid electrolytic capacitor is obtained by a method which includes dissolving a polymerizable material for being converted into a conductive polymer in a water-soluble organic solvent to obtain a solution, adding the solution to water while homogenizing the solution to obtain a sol, immersing an anode body having a dielectric layer in the surface of the anode body in the sol, and applying voltage using the anode body as a positive electrode and a counter electrode as a negative electrode placed in the sol to electropolymerize the polymerizable material. An electropolymerizable liquid for producing a conductive polymer, the liquid composed of a sol comprising water, a water-soluble organic solvent, and a polymerizable material for being converted into the conductive polymer. ## Claims ### Claim 1 A method for producing a conductive polymer, wherein the method comprises: dissolving a polymerizable material which is converted into the conductive polymer in a water-soluble organic solvent to obtain a solution, mixing the solution and water to obtain a sol, and electropolymerizing the polymerizable material in the sol. ### Claim 2 (depends on 1) The method according to claim 1, wherein the polymerizable material is at least one selected from the group consisting of compounds having a thiophene skeleton and compounds having a pyrrole skeleton. ### Claim 3 (depends on 1) The method according to claim 1, wherein a content of the polymerizable material is from 2 g/L to 7 g/L in the sol. ### Claim 4 (depends on 1) The method according to claim 1, wherein the mixing is conducted by adding the solution to the water. ### Claim 5 (depends on 1) The method according to claim 1, wherein a dispersoid in the sol has a 50% diameter of 0.5 nm to 1,000 nm in volumetric basis particle size cumulative distribution. ### Claim 6 (depends on 1) The method according to claim 1, wherein the sol further comprises a dopant. ### Claim 7 (depends on 1) The method according to claim 1, wherein the water-soluble organic solvent is polyhydric alcohols or polyalcohol derivatives. ### Claim 8 (depends on 1) The method according to claim 1, wherein the water-soluble organic solvent has a boiling point of not less than 150°. ### Claim 9 (depends on 1) The method according to claim 1, wherein a mass ratio of the solution to the water is 2/8 to 6/4. ### Claim 10 (depends on 1) The method according to claim 1, wherein an amount of the polymerizable material is 1 to 2 parts by mass relative to 100 parts by mass of the water-soluble organic solvent. ### Claim 11 An electropolymerizable liquid for producing a conductive polymer, wherein the liquid is composed of a sol comprising a polymerizable material, water, and a water-soluble organic solvent, wherein the polymerizable material is converted into a conductive polymer. ### Claim 12 (depends on 11) The electropolymerizable liquid according to claim 11, wherein the sol further comprises a dopant. ### Claim 13 (depends on 11) The electropolymerizable liquid according to claim 11, wherein a dispersoid in the sol has a 50% diameter of 0.5 nm to 1,000 nm in volumetric basis particle size cumulative distribution. ### Claim 14 (depends on 11) The electropolymerizable liquid according to claim 11, wherein the polymerizable material is at least one selected from the group consisting of compounds having a thiophene skeleton and compounds having a pyrrole skeleton. ### Claim 15 (depends on 11) The electropolymerizable liquid according to claim 11, wherein a content of the polymerizable material is from 2 g/L to 7 g/L in the sol. ### Claim 16 (depends on 11) The electropolymerizable liquid according to claim 11, wherein the sol is formed with a dispersoid comprising the polymerizable material converted into the conductive polymer, and a dispersion medium comprising a liquid phase in which a small amount of the polymerizable material converted into the conductive polymer is dissolved. ### Claim 17 (depends on 11) The electropolymerizable liquid according to claim 11, wherein the sol is homogeneous and transparent. ### Claim 18 (depends on 11) The electropolymerizable liquid according to claim 11, wherein an amount of the polymerizable material is 1 to 2 parts by mass relative to 100 parts by mass of the water-soluble organic solvent.