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Method for constructing composite proton exchange membrane by using high-sulfonation-degree polyether-ether-ketone fibers

A polyetheretherketone fiber and proton exchange membrane technology, applied in the field of proton exchange membrane fuel cells, can solve the problems of consumption, low proton conductivity of proton exchange membrane, hindered molecular chain movement, etc.

Pending Publication Date: 2022-02-01
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the high sulfonation degree SPEEK is cross-linked, the swelling rate of the proton exchange membrane is greatly reduced and the mechanical strength is also improved. The proton conductivity of the exchange membrane is low

Method used

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  • Method for constructing composite proton exchange membrane by using high-sulfonation-degree polyether-ether-ketone fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 1.0g potassium chloride solution sulfonation degree of 90% was added to 50mL SPEEK mass fraction of 25%, the soaking at 50 deg.] C 48h, so that H + Completely replaced K + , Washed several times with deionized water, placed in an oven and dried at 60 ℃ 24h, to give a potassium sulfonate form SPEEK.

[0021] Take 0.45g of potassium sulfonate form 1.8gDMF SPEEK was dissolved was added to give a mass fraction of 20% electrospinning a spinning solution, the specific spinning conditions are as follows: spinning rate of 70μL / h, voltage 12kV spinning, spinning wire distance 10cm, receiving drum rotation number 400r / min. Finally obtained a thickness of about 80μm nanofiber proton exchange membrane.

[0022] Take the above-described K + SPEEK forms a proton exchange membrane nanofiber 0.05g, horizontally placed flat on a glass plate; H then take 0.2g sulfonation degree of 90% + In the form of SPEEK, is dissolved in 1.5g deionized water, 0.1g DMSO and added to the casting so...

Embodiment 2

[0025] Take 2.0g sodium chloride solution sulfonation degree of 80% by mass fraction of SPEEK was added to 100mL of 20%, the soaking at 60 deg.] C 24h, so that H + Completely replacing Na + , Washed several times with deionized water, placed in an oven and dried at 60 ℃ 24h, to give the sodium form SPEEK.

[0026] Take the form of 0.6g of sodium was added to 2.0gDMF SPEEK was dissolved to give a mass fraction of 23% electrospinning a spinning solution, the specific spinning conditions are as follows: spinning rate of 60μL / h, voltage 15kV spinning, spinning wire distance 15cm, receiving drum rotation number 500r / min. Finally obtained nanofiber film thickness of approximately 100μm.

[0027] Take the above Na + SPEEK forms nanofiber membrane 0.06g, horizontally placed flat on a glass plate; sulfonation then take 0.34g of 90% H + In the form of SPEEK, is dissolved in 2.4g of deionized water, and added 0.17g DMSO casting solution was prepared. The casting solution was cooled to ab...

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Abstract

The invention discloses a method for constructing a composite proton exchange membrane by using high-sulfonation-degree polyether-ether-ketone fibers. The method comprises the following specific steps: firstly, soaking high-sulfonation-degree polyether-ether-ketone in a salt solution to replace H<+>, and carrying out electrostatic spinning to obtain a nanofiber membrane in the form of sulfonate; filling pores of the fiber membrane with sulfonated polyetheretherketone to obtain a composite membrane, carrying out thermal crosslinking on an H < + >-form sulfonic acid group in a composite membrane matrix and a benzene ring on a high-molecular main chain under the catalytic action of dimethyl sulfoxide, and because the sulfonic acid group in a sulfonate form is not subjected to a thermal crosslinking reaction, the fiber still has high sulfonation degree after crosslinking. And high proton conductivity is maintained. The composite membrane matrix has good mechanical strength after crosslinking, and the nanofiber constructs a long-range proton transmission channel in the composite membrane, so that the proton exchange membrane shows high proton conductivity.

Description

Technical field [0001] The present invention is in the field of proton exchange membrane fuel cell, particularly to a method of using highly sulfonated polyether ether ketone fibers constructed of high proton conductivity of the proton exchange membrane composite. Background technique [0002] Proton exchange membrane fuel cells convert chemical energy directly into electrical energy, only water and the product, an efficient, environmentally friendly features, is considered to be the future of the use of hydrogen is an important form. Proton exchange membrane fuel cells as the core member, the main role is to prevent rapid proton conducting hydrogen and oxygen permeable, proton exchange membrane requires high proton conductivity is required to have good mechanical strength and chemical stability. [0003] In recent years, sulfonated polyether ether ketone (of SPEEK) as a proton exchange membrane materials are widely studied. SPEEK by introducing a sulfonic acid group in the main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1069H01M8/1072H01M8/1025
CPCH01M8/1069H01M8/1072H01M8/1025Y02E60/50
Inventor 刘勇韩丁波
Owner BEIJING UNIV OF CHEM TECH
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