ELECTROLYTIC CAPACITOR AND METHOD FOR PRODUCING ELECTROLYTIC CAPACITOR

Title:

ELECTROLYTIC CAPACITOR AND METHOD FOR PRODUCING ELECTROLYTIC CAPACITOR

Document Type and Number:

WIPO Patent Application WO/2023/234244

Kind Code:

A1

Abstract:

The present invention addresses the problem of providing: an electrolytic capacitor which employs, as an electrode foil, a sintered foil having a metal sintered body at least on the surface thereof, and which is capable of stably generating relatively large electrostatic capacitance unique to a sintered foil; and a method for producing said electrolytic capacitor. As a solution to the above problem, an electrolytic capacitor (1) according to the present invention is provided with: a capacitor element (2) comprising a positive electrode foil (8) in which a dielectric layer is formed, a negative electrode foil (9), and a separator (10) disposed between the positive electrode foil (8) and the negative electrode foil (9); and an electrolytic solution (3) with which the inside of the capacitor element (2) is impregnated. The positive electrode foil (8) or the negative electrode foil (9) is obtained by forming a sintered body of a composition that contains a metal powder into the shape of a foil (composed of a foil-like sintered body (8c)), or alternatively, by forming, on the surface of a base material, a sintered film (8b) composed of the sintered body. The viscosity μ [cP] of the electrolytic solution (3) at 25 [°C] is 400 [cP] or less.

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Inventors:

NAKAJIMA YOHEI (JP)
KANEKO TSUTOMU (JP)
SAKURAI YOSHISHIGE (JP)
NOZAWA TAKASHI (JP)

Application Number:

PCT/JP2023/019881

Publication Date:

December 07, 2023

Filing Date:

May 29, 2023

Export Citation:

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Assignee:

RUBYCON CORP (JP)
YOKO TOYO METALS CO LTD (JP)

International Classes:

H01G9/035; H01G9/052; H01G9/145

Domestic Patent References:

WO2013011881A1

2013-01-24

Foreign References:

JP2018110233A	2018-07-12
JP2005303062A	2005-10-27
JPH05275286A	1993-10-22

Attorney, Agent or Firm:

WATANUKI PATENT SERVICE BUREAU (JP)

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