Title:
ELECTRIC DOUBLE LAYER CAPACITOR AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2024/004740
Kind Code:
A1
Abstract:
The present invention provides: an electric double layer capacitor which is suppressed in gas generation; and a method for producing this electric double layer capacitor. This electric double layer capacitor is obtained by impregnating an element, which is obtained by winding a positive electrode and a negative electrode with a separator being interposed therebetween, with an electrolyte solution that contains sulfolane and a chain sulfone as solvents. The ratio Cp:Cn of the electrostatic capacitance Cp of the positive electrode to the electrostatic capacitance Cn of the negative electrode is set to (1.3 or more):1. The positive electrode is formed such that the electrode potential (vs Ag/Ag+) is within or in the vicinity of the range of +0.58 V to +0.78 V; and the negative electrode is formed such that the electrode potential (vs Ag/Ag+) is within the range of -2.42 V to -2.19 V. According to the present invention, an element is formed by winding a positive electrode and a negative electrode with a separator being interposed therebetween; and the element is impregnated with an electrolyte solution that contains sulfolane and a chain sulfone as solvents.
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Inventors:
KANNO MASAKI (JP)
KAWASAKI YUSUKE (JP)
HAGIYA MASAYUKI (JP)
KAWASAKI YUSUKE (JP)
HAGIYA MASAYUKI (JP)
Application Number:
PCT/JP2023/022648
Publication Date:
January 04, 2024
Filing Date:
June 19, 2023
Export Citation:
Assignee:
NIPPON CHEMICON (JP)
International Classes:
H01G11/24; H01G11/16; H01G11/60; H01G11/86
Foreign References:
| JP2013175619A | 2013-09-05 | |||
| JPH10270293A | 1998-10-09 | |||
| JPH0665206B2 | 1994-08-22 | |||
| JP2000286161A | 2000-10-13 | |||
| JP2014029898A | 2014-02-13 | |||
| JP2007201118A | 2007-08-09 |
Attorney, Agent or Firm:
KIUCHI Mitsuharu et al. (JP)
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