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Separator for electric double layer capacitor

A technology for electric double layer capacitors and diaphragms, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor separators, hybrid capacitor electrolytes, etc., to achieve excellent characteristics and excellent thermal stability

Inactive Publication Date: 2018-07-31
JAPAN VILENE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this patent document 3, it is described that the time required for heat resistance can be shortened to 1 / 2 to 1 / 20 compared with the conventional technology, but there is room for improvement in productivity.

Method used

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  • Separator for electric double layer capacitor
  • Separator for electric double layer capacitor

Examples

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Embodiment

[0036] In the following, as examples of the present invention, the results of producing separators made of various non-woven fabrics including preferred embodiments of the present invention and evaluating the dimensional stability in electrolyte solutions are described, but it should be understood that the present invention is not limited to In the following examples, the shape, arrangement relationship, numerical conditions, and the like can be appropriately designed arbitrarily within the scope of the purpose of the present invention.

[0037] (Preparation of polymers for evaluation and spinning solutions)

[0038] First, in order to prepare a spinning solution, two types of homopolymers with a weight average molecular weight of 550,000 and 370,000, in which only acrylonitrile was homopolymerized, and the acrylonitrile-acrylate copolymer disclosed in the above-mentioned Patent Document 1 were prepared. There were three types of staple fibers "Vonnel D122" (manufactured by Mi...

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Abstract

The purpose of the present invention is to realize a separator that has excellent thermal stability in size, shape and the like even in a high temperature environment. The separator comprises a nonwoven fabric obtained by subjecting nonwoven fabric comprising homo-PAN fibers to a flame proofing process in a temperature range of 210 DEG C to 300 DEG C, wherein the value of ID / IN, which is the ratioof an absorption peak intensity ID of a carbon double bond-derived region (1580 to 1610 cm-1) of the homo-PAN nonwoven fabric as determined by infrared absorption spectroscopy, to an absorption peakintensity IN derived from a nitrile group (2240 cm<-1>), is not less than 0.07, and wherein the fiber shape and size are stably maintained after immersion for 30 minutes in an electrolytic solution at140 DEG C including propylene carbonate.

Description

technical field [0001] The present invention relates to a separator suitable for use in an electric double layer capacitor for power supply through recharging. Background technique [0002] In recent years, efforts to curb carbon dioxide emissions that cause global warming have been actively promoted, and hybridization, which can suppress fossil fuel consumption in vehicles such as automobiles, has gradually matured as a practical technology. Power storage devices such as capacitors and lithium-ion batteries that store electricity can be used in various electronic products in environments where it is difficult to secure a power source. Therefore, they have been put into practical use in various fields, and more efficient power storage devices are required. [0003] As an example of such an electrical storage device technology, Japanese Patent Laid-Open No. 2007-266311 (Patent Document 1) proposes a separator for an electric double layer capacitor. This technique discloses a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/52
CPCY02E60/13H01G11/60H01G11/52H01G11/84Y02E60/10H01M50/44
Inventor 野口健吾道畑典子佐藤芳德
Owner JAPAN VILENE CO LTD
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