Electrolytic capacitor and manufacturing method of electrolytic capacitor

Patent metadata

Field	Value
Publication number	US-11417472-B2
Application number	US-202016910955-A
Country	US
Kind code	B2
Filing date	Jun 24, 2020
Priority date	Jun 28, 2019
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

An electrolytic capacitor including an anode body having a dielectric layer, and a solid electrolyte layer. The solid electrolyte layer contains an electrically conductive material, and an additive. The conductive material contains a π-conjugated polymer, and a polymer dopant doped in the π-conjugated polymer and having a first anionic group. The additive includes a quinone compound having a second anionic group.

First claim

What is claimed is:

1. An electrolytic capacitor comprising an anode body having a dielectric layer, and a solid electrolyte layer,
the solid electrolyte layer containing an electrically conductive material, and an additive,
the electrically conductive material containing a π-conjugated polymer, and a polymer dopant doped in the π-conjugated polymer and having a first anionic group,
the additive including a quinone compound having a second anionic group,
wherein at least part of the quinone compound is not doped in the π-conjugated polymer.

2. The electrolytic capacitor of claim 1 , wherein the solid electrolyte layer contains the quinone compound in an amount of 1 part by mass or more and 30 parts by mass or less, per 100 parts by mass of the electrically conductive material.

3. The electrolytic capacitor of claim 1 , wherein the quinone compound includes at least one compound selected from the group consisting of an anthraquinone compound, a naphthoquinone compound, and a benzoquinone compound.

4. The electrolytic capacitor of claim 1 , wherein the quinone compound includes at least one selected from the group consisting of anthraquinone-1-sulfonic acid, anthraquinone-2-sulfonic acid, anthraquinone-2,6-disulfonic acid, anthraquinone-2,7-disulfonic acid, anthraquinone-1,5-disulfonic acid, 1,2-naphthoquinone-4-sulfonic acid, 1,4-benzoquinone-2-sulfonic acid, and 1,2-benzoquinone-4-sulfonic acid.

5. The electrolytic capacitor of claim 1 , further comprising a liquid component,
the liquid component including at least one compound selected from the group consisting of glycol compounds and glycerin compounds.

6. The electrolytic capacitor of claim 1 , wherein the solid electrolyte layer is formed by impregnating a processing liquid containing the electrically conductive material and the additive, into at least part of the dielectric layer.

7. A manufacturing method of an electrolytic capacitor, the method comprising:
a first step of preparing an electrically conductive material containing a π-conjugated polymer and a polymer dopant doped in the π-conjugated polymer and having a first anionic group;
a second step of preparing a processing liquid containing the electrically conductive material and a quinone compound having a second anionic group; and
a third step of forming a solid electrolyte layer by impregnating the processing liquid, into at least part of a dielectric layer of an anode body.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Takatani Kazuhiro
• Nakamura Akito

Classifications

• H01G9/0036

  Formation of the solid electrolyte layer · CPC title

• H01G9/025 Primary

  Solid electrolytes (H01G11/54 takes precedence) · CPC title

• H01G9/15 Primary

  Solid electrolytic capacitors (H01G11/00 takes precedence) · CPC title

• H01G9/028 Primary

  Organic semiconducting electrolytes, e.g. TCNQ · CPC title

• C08K5/08

  Quinones · CPC title