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Aromatic polyamide porous film and separator for capacitor or battery using same

An aromatic polyamide, porous membrane technology, used in hybrid capacitor separators, capacitors, electrolytic capacitors, etc., can solve the problems of reduced membrane strength, weakened hydrophilicity, and no improvement of pore surface, and achieves sufficient heat resistance. Good effect of sex and affinity

Active Publication Date: 2013-09-25
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the plasma treatment method is used, the hydrophilicity tends to weaken as time goes by, and there are following problems: the pore surface inside the membrane is not improved, and in addition, the molecular chain is cut off by plasma irradiation, and the strength of the membrane is reduced. Wait

Method used

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  • Aromatic polyamide porous film and separator for capacitor or battery using same
  • Aromatic polyamide porous film and separator for capacitor or battery using same
  • Aromatic polyamide porous film and separator for capacitor or battery using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0154] In dehydrated N-methyl-2-pyrrolidone (NMP), dissolve 2-chloro-p-phenylenediamine corresponding to 80 mol% of the total amount of diamines and 4,4 '-Diaminodiphenyl ether, and then add 2-chloroterephthaloyl chloride (CTPC) equivalent to 98.5 mol% of the total amount of diamine, and polymerize after stirring for 2 hours to obtain a solution of aromatic polyamide . The solution temperature at the start of the polymerization was 4°C. CTPC was divided into 10 equal portions and added at intervals of 10 minutes, thereby controlling the temperature increase during the polymerization to 28°C or less. This solution was put into a mixer together with water, and the polymer was precipitated while stirring, and taken out. The polymer taken out was washed with water, fully dried and dissolved in NMP, and 100 parts by mass of polyvinylpyrrolidone (PVP) with a weight average molecular weight of 1 million was added to 100 parts by mass of aromatic polyamide to obtain a polymer concent...

Embodiment 2

[0156] A porous membrane was obtained in the same manner as in Example 1 except that the hydrophilic polymer was PVP having a weight average molecular weight of 500,000. Table 2 shows the evaluation results of the obtained porous membrane.

Embodiment 3

[0158] A porous membrane was obtained in the same manner as in Example 1, except that the amount of the hydrophilic polymer added to the membrane-forming stock solution was 50 parts by mass and the polymer concentration of the film-forming stock solution was 12% by mass. Table 2 shows the evaluation results of the obtained porous membrane.

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Abstract

The invention provides a porous film comprising aromatic polyamide as a constituent component that has high heat resistance, high air permeability and high affinity to electrolytes. It is a porous aromatic polyamide film comprising aromatic polyamide and a hydrophilic polymer wherein the hydrophilic polymer accounts for 12 to 50 parts by mass per 100 parts by mass of the aromatic polyamide, the thickness being 2 to 30 micrometers, the Gurley air permeability being 0.5 to 300 seconds / 100 ml, and the thermal shrinkage rate being -0.5 to 1.0% at 200°C.

Description

technical field [0001] The present invention relates to a porous aromatic polyamide membrane, and in particular, to a porous aromatic polyamide membrane suitable for use as a separator for electrical storage devices such as capacitors and batteries. Background technique [0002] Capacitors such as lithium-ion capacitors are suitable for applications such as auxiliary power supplies for various machines, storage of regenerative energy, etc., as represented by buffer applications for wind power generation components, due to their excellent output density, safety, and cycle characteristics, and long life. . [0003] Separators for capacitors are usually heat-treated to remove moisture during the manufacturing process, and this treatment temperature needs to be raised to improve quality and productivity. In addition, for example, when mounting on a circuit board, a soldering process by a reflow method is required, and higher heat resistance is required. Furthermore, from the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28C08L77/10H01G9/02H01M2/16H01M50/423H01M50/489
CPCH01G11/52C08J2377/00C08L77/10H01M10/0525C08J5/2256Y02E60/12C08J2439/06H01G9/02H01M2/1653Y02E60/13Y10T428/249979Y10T428/249978Y02E60/10H01M50/489H01M50/423C08L101/00C08L71/02C08L29/04C08L39/06C08J9/28H01M50/409C08J9/00H01M50/411H01M50/491
Inventor 沢本敦司西原健太佃明光
Owner TORAY IND INC
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