Title:
ELECTROLYTIC CAPACITOR AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP2021145136
Kind Code:
A
Abstract:
To suppress increase in an ESR and reduce a leakage current while securing a high capacitance, in an electrolytic capacitor using an electrolysis solution.SOLUTION: An electrolytic capacitor disclosed herein includes a capacitor element and an electrolysis solution impregnated in the capacitor element. The capacitor element includes: an anode foil on the surface of which a dielectric layer is formed; a cathode foil disposed to face the anode foil; and a conductive polymer layer disposed between the anode foil and the cathode foil. An inorganic conductive layer is formed on a surface of the cathode foil. The inorganic conductive layer has a convex portion and a recessed portion on a surface thereof. On the convex portion, a first region where the inorganic conductive layer is in contact with the conductive polymer layer is formed. On the recessed portion, a second region where the electrolysis solution infiltrates between the inorganic conductive layer and the conductive polymer layer is formed. The electrolysis solution contains a first solvent and water, and a proportion of water in the electrolysis solution ranges from 0.1 mass% to 6.0 mass%, inclusive. The first solvent has no boiling point or a boiling point of 180°C or more.SELECTED DRAWING: Figure 1
Inventors:
TSUDA YASUHIRO
Application Number:
JP2021087049A
Publication Date:
September 24, 2021
Filing Date:
May 24, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CORP
International Classes:
H01G9/042; H01G9/035; H01G9/048; H01G9/055; H01G9/145; H01G9/15
Domestic Patent References:
| JP2013026536A | 2013-02-04 | |||
| JP2005223197A | 2005-08-18 | |||
| JPH11283874A | 1999-10-15 | |||
| JPH0529180A | 1993-02-05 | |||
| JP2000182898A | 2000-06-30 | |||
| JP2006190878A | 2006-07-20 | |||
| JP2014130854A | 2014-07-10 | |||
| JP2011082313A | 2011-04-21 | |||
| JPH10270291A | 1998-10-09 | |||
| JPS61180420A | 1986-08-13 | |||
| JPS61214420A | 1986-09-24 | |||
| JP2014187278A | 2014-10-02 |
Foreign References:
| WO2011099261A1 | 2011-08-18 |
Attorney, Agent or Firm:
Kawasaki/Hashimoto Patent Office