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Electrolyte diaphragm for vanadium battery and preparation method thereof

An electrolyte membrane, vanadium battery technology, applied in fuel cells, regenerative fuel cells, circuits, etc., can solve the problems of anion exchange membrane human body and environmental hazards, thermal stability and chemical stability need to be further improved, etc., to achieve equipment and reaction. The requirements are not high, the ion exchange capacity is improved, and the preparation method is simple and easy to implement.

Active Publication Date: 2019-08-13
南通江涌投资开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chloromethyl ether is a highly toxic substance, which makes the preparation of anion exchange membranes very harmful to the human body and the environment.
Moreover, the mechanical properties, thermal stability and chemical stability of traditional anion exchange membranes need to be further improved.

Method used

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  • Electrolyte diaphragm for vanadium battery and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method for an electrolyte diaphragm for a vanadium battery, comprising the steps of:

[0028] 1) Preparation of quaternary ammonium salt-type silane: Add 12 g of epichlorohydrin into a three-necked flask, slowly add 10 g of bis(diethylamino)silane dropwise with a constant pressure dropping funnel, and reflux at 50°C for about 6 hours. Rotary evaporation to remove excess epichlorohydrin, recrystallization in acetone 3 times, and then rotary evaporation to remove acetone again to obtain quaternary ammonium silane;

[0029] 2) Preparation of polymer: Dissolve 14.4 g of quaternary ammonium silane and 10 g of 4,4-dihydroxydiphenyl sulfone prepared in step 1) in 60 g of dimethyl sulfoxide, and then add benzyl 5 g of dimethylamine, stirred and reacted at 90° C. for 6 hours in a nitrogen atmosphere, then precipitated in acetone, washed the product with ethanol for 3 times, and dried in a vacuum oven at 60° C. for 10 hours;

[0030] 3) Preparation of diaphragm: 0....

Embodiment 2

[0034] A preparation method for an electrolyte diaphragm for a vanadium battery, comprising the steps of:

[0035] 1) Preparation of quaternary ammonium salt-type silane: Add 13g of epichlorohydrin into a three-necked flask, slowly add 10g of bis(diethylamino)silane dropwise with a constant pressure dropping funnel, and reflux at 52°C for about 6.5h , rotary evaporation to remove excess epichlorohydrin, recrystallization in acetone 4 times, and then rotary evaporation again to remove acetone to obtain quaternary ammonium salt type silane;

[0036] 2) Preparation of polymer: Dissolve 14.4 g of quaternary ammonium silane and 10 g of 4,4-dihydroxydiphenyl sulfone prepared in step 1) in 75 g of N,N-dimethylformamide, and wait until completely After dissolving, add 6.5g of tetrabutylammonium bromide, stir and react for 6.5 hours in a helium atmosphere at a temperature of 93°C, then precipitate in acetone, wash the product with ethanol for 4 times, and place it in a vacuum drying ov...

Embodiment 3

[0041] A preparation method for an electrolyte diaphragm for a vanadium battery, comprising the steps of:

[0042] 1) Preparation of quaternary ammonium salt-type silane: Add 13.5 g of epichlorohydrin into a three-necked flask, slowly add 10 g of bis(diethylamino)silane dropwise with a constant pressure dropping funnel, and reflux at 56°C for about 7 hours , rotary evaporation to remove excess epichlorohydrin, recrystallization in acetone 5 times, and then rotary evaporation again to remove acetone to obtain quaternary ammonium salt type silane;

[0043]2) Preparation of polymer: Dissolve 14.4 g of quaternary ammonium silane and 10 g of 4,4-dihydroxydiphenyl sulfone prepared in step 1) in 95 g of N-methylpyrrolidone. After completely dissolving, add Benzyltriethylammonium chloride 7.5g, stirred and reacted at 96°C for 7 hours in a neon atmosphere, then precipitated in acetone, washed the product with ethanol for 5 times, and dried in a vacuum oven at 71°C for 13 Hour;

[004...

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Abstract

The invention provides a preparation method of an electrolyte separator for the vanadium battery. The preparation method comprises the following steps of 1) preparing quaternary ammonium silane; 2) preparing a polymer; and 3) preparing the separator. The invention also discloses the electrolyte separator, obtained by the preparation method of the electrolyte separator for the vanadium battery, forthe vanadium battery and the vanadium battery employing the electrolyte separator for the vanadium battery as an electrolyte separator. Compared with a traditional quaternary ammonium salt negative ion exchange membrane in the prior art, the electrolyte separator for the vanadium battery, prepared by the method has the advantages of lower cost, better mechanical property, better chemical stability and better thermal stability, more excellent vanadium blocking performance, higher ion conductivity and small deformation, and the application requirement of the electrolyte separator for the vanadium battery is met.

Description

technical field [0001] The invention belongs to the technical field of polyelectrolyte materials, and relates to a vanadium battery component, in particular to an electrolyte diaphragm for a vanadium battery and a preparation method thereof. Background technique [0002] In recent years, with the development of the economy and the advancement of the global industrialization process, energy issues and environmental issues have become increasingly severe and have become important factors restricting social progress. Carrying out energy conservation and consumption reduction, strengthening the development and utilization of renewable energy such as water energy, wind energy, solar energy, tidal energy, and nuclear energy are important ways to solve these two world-wide problems. The use of renewable energy such as wind energy and solar energy is inseparable from energy storage technologies that are efficient, cheap, less polluting, and safe and reliable. All-vanadium redox flo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1069H01M8/1072H01M8/1048H01M8/18
CPCH01M8/1048H01M8/1069H01M8/1072H01M8/188Y02E60/50
Inventor 周路流其他发明人请求不公开姓名
Owner 南通江涌投资开发有限公司
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