Title:
ELECTROLYTIC CAPACITOR AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2019/230676
Kind Code:
A1
Abstract:
Provided is an electrolytic capacitor comprising: a negative electrode having a conductive substrate and a conductive polymer layer disposed on the surface of the conductive substrate; a positive electrode having a valve metal substrate and a dielectric layer disposed on the surface of the valve metal substrate, the positive electrode being disposed such that dielectric layer and the conductive polymer layer face each other with a space therebetween; and an ion-conductive electrolyte filling said space, wherein the conductive polymer layer is composed of a copolymer of 3,4-ethylenedioxythiophene and a compound represented by formula (I) (in the formula, the R's represent C1-10 linear or branched alkyls, x represents an integer of 1-4, and the respective R's may be identical or different when x represents an integer of at least 2). This electrolytic capacitor solves the problem, inherent to electrolytic capacitors in which the conductive polymer layer in contact with the ion-conductive electrolyte exhibits a redox capacity when voltage is applied between the positive electrode and the negative electrode, wherein the capacitance decreases when bias voltage is applied after a high-temperature load test.
Inventors:
KOSEKI KAZUYA (JP)
NAGAHARA KAZUHIRO (JP)
MACHIDA KENJI (JP)
NAGAHARA KAZUHIRO (JP)
MACHIDA KENJI (JP)
Application Number:
PCT/JP2019/020989
Publication Date:
December 05, 2019
Filing Date:
May 28, 2019
Export Citation:
Assignee:
NIPPON CHEMICON (JP)
International Classes:
H01G9/028; H01G9/00; H01G9/022; H01G9/042; H01G11/02; H01G11/48
Domestic Patent References:
| WO2015129515A1 | 2015-09-03 | |||
| WO2015107894A1 | 2015-07-23 |
Foreign References:
| JP2006352172A | 2006-12-28 | |||
| JP2017188655A | 2017-10-12 |
Attorney, Agent or Firm:
SATAKE, Kazuko (JP)
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