Method for producing conductive polymer and method for producing solid electrolyte capacitor

Patent metadata

Field	Value
Publication number	US-10370485-B2
Application number	US-201715795880-A
Country	US
Kind code	B2
Filing date	Oct 27, 2017
Priority date	Jul 25, 2012
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

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.

First claim

The invention claimed is:

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.

2. 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.

3. 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.

4. The method according to claim 1 , wherein the mixing is conducted by adding the solution to the water.

5. 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.

6. The method according to claim 1 , wherein the sol further comprises a dopant.

7. The method according to claim 1 , wherein the water-soluble organic solvent is polyhydric alcohols or polyalcohol derivatives.

8. The method according to claim 1 , wherein the water-soluble organic solvent has a boiling point of not less than 150°.

9. The method according to claim 1 , wherein a mass ratio of the solution to the water is 2/8 to 6/4.

10. 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.

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.

12. The electropolymerizable liquid according to claim 11 , wherein the sol further comprises a dopant.

13. 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.

14. 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.

15. 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.

16. 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.

17. The electropolymerizable liquid according to claim 11 , wherein the sol is homogeneous and transparent.

18. 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.

Assignees

• Showa Denko Kk

Inventors

• Naito Kazumi
• Yabe Shoji

Classifications

• C25D9/02

  with organic materials · CPC title

• C08G2261/3221

  containing one or more nitrogen atoms as the only heteroatom, e.g. pyrrole, pyridine or triazole · CPC title

• C08G2261/3223

  containing one or more sulfur atoms as the only heteroatom, e.g. thiophene · CPC title

• C08G2261/44

  Electrochemical polymerisation, i.e. oxidative or reductive coupling · CPC title

• C08G2261/90

  Applications · CPC title