Polymer-ion-permeable membrane, composite-ion-permeable membrane, battery electrolyte membrane, and electrode composite body

An ion-permeable membrane and polymer technology, applied in the direction of non-aqueous electrolyte battery electrodes, battery electrodes, non-aqueous electrolyte batteries, etc., can solve low conductivity, elastic modulus, reduced heat resistance, and damaged contact inhibition function and other problems, to achieve the effects of deformation resistance, impact resistance, excellent flexibility, and excellent safety

Active Publication Date: 2017-08-01
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the electrolyte system, the conductivity is still low, and further improvement is required for practical use.
In addition, since the ion conductivity is closely related to the segmental movement of the polymer, research has been focused on polymers with a low glass transition temperature due to softening of the polymer structure, branching, and lower molecular weight, but other On the one hand, since the elastic modulus and heat resistance of these polymers are also lowered, the contact suppression function between the positive and negative electrodes is impaired similarly to the gel electrolyte
[0007] As mentioned above, polymers having high elastic modulus, strength, and heat resistance when formed into a film generally have a rigid polymer structure, so it is considered that high ion conductivity cannot be expected, and many studies have not been conducted so far

Method used

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  • Polymer-ion-permeable membrane, composite-ion-permeable membrane, battery electrolyte membrane, and electrode composite body
  • Polymer-ion-permeable membrane, composite-ion-permeable membrane, battery electrolyte membrane, and electrode composite body
  • Polymer-ion-permeable membrane, composite-ion-permeable membrane, battery electrolyte membrane, and electrode composite body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] Dissolve 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl (manufactured by Toray Fine Chemical Co., Ltd.) as a diamine in dehydrated N-methyl-2- In pyrrolidone (NMP, manufactured by Mitsubishi Chemical Corporation), it was cooled to 30° C. or lower. 2-Chloroterephthaloyl chloride (manufactured by Nippon Light Metal Co., Ltd.) corresponding to 99 mol% relative to the total amount of diamine was added thereto over 30 minutes while the system was kept under a nitrogen stream at 30° C. After adding the total amount, stirring was performed for about 2 hours to polymerize the aromatic polyamide (A). The obtained polymerization solution was neutralized with 97 mol% of lithium carbonate (manufactured by Honso Chemical Co., Ltd.) and 6 mol% of diethanolamine (manufactured by Tokyo Chemical Industry Co., Ltd.) with respect to the total amount of acid chlorides, and an aromatic polyamide (A) was obtained. The solution. The logarithmic viscosity η of the obtained aromatic polyamide...

Embodiment 2

[0150] The diamine used to obtain the aromatic polyamide (B) is 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl equivalent to 70 mol% relative to the total amount of diamine and equivalent In 30 mol% of 1,3-phenylenediamine (manufactured by Tokyo Chemical Industry Co., Ltd.), the acid chloride was terephthaloyl chloride (manufactured by Tokyo Chemical Industry Co., Ltd.) corresponding to 99 mol% of the total amount of diamine, except Except that, a sample of the polymer ion-permeable membrane was obtained in the same manner as in Example 1. Table 1 and Table 2 show the evaluation results of the obtained samples.

Embodiment 3

[0152] The acid chloride used to obtain the aromatic polyamide (C) was 2-fluoroterephthaloyl chloride (manufactured by Iharanickei Chemical Industry Co., Ltd.) corresponding to 99 mol% relative to the total amount of diamines. Samples of polymer ion-permeable membranes were obtained in the same manner. Table 1 and Table 2 show the evaluation results of the obtained samples.

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Abstract

The purpose of the present invention is to provide an ion-permeable membrane that is substantially free of holes and that has excellent ion permeability, heat resistance, strength, and flexibility, to provide a battery electrolyte membrane that uses the ion-permeable membrane, and to provide an electrode composite body. The present invention, which is for achieving said purpose, is a polymer-ion-permeable membrane that has an average radius of free volume of 0.32-0.50 nm.

Description

technical field [0001] The present invention relates to a polymer ion-permeable membrane, and particularly to a polymer ion-permeable membrane that can be suitably used as a battery separator. Background technique [0002] Generally, in a non-aqueous electrolyte battery, in order to make ion conduction between the positive and negative electrodes possible, and prevent short circuit caused by the contact of the positive and negative electrodes on the other hand, a battery with a pore size of tens of nm to several μm is used. Separators made of porous membranes and non-woven fabrics that penetrate pores. However, in the case of using a separator with pores, there are short-circuits caused by the growth of dendrites or foreign substances mixed in, and vulnerability to deformation such as bending and compression, and it is difficult to achieve thin film and strength maintenance at the same time. and other subjects. [0003] Examples of substances that solve these problems incl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18B32B5/18B32B27/34H01B1/06H01M2/16H01M2/18H01M4/13H01M10/0565H01M50/423H01M50/429H01M50/449H01M50/489H01M50/491
CPCB32B5/18B32B27/34C08J5/18H01B1/06H01M10/0565H01M4/131H01M4/133H01M10/0525H01M2300/0082H01M2300/0085H01M2300/0091H01M10/052Y02E60/10H01M50/446H01M50/449H01M50/491H01M50/429H01M50/423H01M50/489C08J5/2256H01M2300/0094C08J2379/08C08J2377/00H01M50/46B01D71/56B01D71/64C08G73/1039Y02T10/70
Inventor 沢本敦司西村大佃明光
Owner TORAY IND INC
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