Preparation method of modified perfluorosulfonic acid proton exchange membrane for fuel battery

A proton exchange membrane, perfluorosulfonic acid technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of complex operation process, high production cost, complex production process, etc., and achieve uncomplicated preparation process and environmental pollution. Small, great performance

Active Publication Date: 2018-04-20
NANTONG DUOQIAN NEW MATERIAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it has been very difficult to obtain a proton exchange membrane with high proton conductivity and low methanol permeability, which greatly limits its practical application.
Although researchers have developed a variety of organic and inorganic modification methods, the operation process is generally complicated, which is not conducive to large-scale and industrial production, and the modification methods are not cheap
Mo

Method used

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  • Preparation method of modified perfluorosulfonic acid proton exchange membrane for fuel battery

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Experimental program
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Effect test

Embodiment 1

[0021] S1: 40 parts of lignin, 25 parts of diethyl ether and 70 parts of distilled water were mixed, and stirred at a temperature of 90°C at a rate of 200r / min for 1h;

[0022] S2: Lower the temperature of the solution obtained in step S1 to 40°C, then introduce chlorine gas at 2ml / min, and continue the reaction for 10 minutes; then add 20 parts of p-toluenesulfonic acid, raise the temperature to 60°C, and stir at a rate of 200r / min Reaction for 30min, the product was obtained after distillation;

[0023] S3: Add the distillation product obtained in step S2 into the casting solution of the perfluorosulfonic acid proton exchange membrane, wherein the distillation product accounts for 30%; ultrasonically treat at a temperature of 50° C. to make it uniform, and obtain a mixed solution;

[0024] S4: casting the mixed solution obtained in step S3 into a mold, and placing it in an oven at 120° C., and then vacuuming and maintaining it for 8 hours to obtain a composite proton exchang...

Embodiment 2

[0027] S1: Mix 60 parts of lignin, 30 parts of diethyl ether and 80 parts of distilled water, and stir and react at a rate of 150 r / min for 3 hours at a temperature of 110°C;

[0028] S2: Lower the temperature of the solution obtained in step S1 to 50°C, then pass in chlorine gas at 2ml / min, and continue the reaction for 20 minutes; then add 10 parts of p-toluenesulfonic acid, raise the temperature to 80°C, and stir at a rate of 300r / min Reaction for 50min, the product was obtained after distillation;

[0029] S3: adding the distillation product obtained in step S2 into the casting solution of the perfluorosulfonic acid proton exchange membrane, wherein the distillation product accounts for 60%; ultrasonic treatment at a temperature of 60° C. to make it uniform to obtain a mixed solution;

[0030] S4: casting the mixed solution obtained in step S3 into a mold, and placing it in an oven at 140° C., and then vacuuming and maintaining it for 20 hours to obtain a composite proton ...

Embodiment 3

[0033] S1: Mix 45 parts of lignin, 28 parts of diethyl ether and 75 parts of distilled water, and stir and react at a temperature of 95°C at a speed of 165r / min for 1.5h;

[0034] S2: Lower the temperature of the solution obtained in step S1 to 45°C, then introduce chlorine gas at 2ml / min, and continue the reaction for 12 minutes; then add 15 parts of p-toluenesulfonic acid, raise the temperature to 65°C, and stir at a rate of 250r / min Reaction 35min, obtain product after distillation;

[0035] S3: Add the distillation product obtained in step S2 into the casting solution of the perfluorosulfonic acid proton exchange membrane, wherein the distillation product accounts for 40%; ultrasonically treat at a temperature of 55° C. to make it uniform, and obtain a mixed solution;

[0036] S4: casting the mixed solution obtained in step S3 into a mold, and placing it in an oven at 125° C., and then vacuuming and keeping it for 10 hours to obtain a composite proton exchange membrane;

...

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Abstract

The invention discloses a preparation method of a modified perfluorosulfonic acid proton exchange membrane for a fuel battery. The preparation method comprises the following steps of mixing lignin, diethyl ether and distilled water, and stirring to react for 1 to 3h at the temperature of 90 to 110 DEG C and rate of 150 to 200r/min; reducing the temperature of a solution to 40 to 50 DEG C, leadingchloride gas at the rate of 2ml/min, and continuing to react for 10 to 20min; then, adding p-toluene sulfonic acid, increasing the temperature to 60 to 80 DEG C, stirring to react for 30 to 50min at the rate of 200 to 300r/min, and distilling, so as to obtain a product; adding the distilled product into a membrane casting liquid of the perfluorosulfonic acid proton exchange membrane; uniformly treating by ultrasonic waves at the temperature of 50 to 60 DEG C, so as to obtain a mixed solution; casting the mixed solution into a die, putting into an oven with the temperature of 120 to 140 DEG C,sucking vacuum, and maintaining for 8 to 20h, so as to obtain a composite proton exchange membrane; sequentially soaking for 20 to 30min in a hydrogen peroxide water solution, and soaking for 30 to 40min in 20% sulfuric acid, so as to obtain the modified perfluorosulfonic acid proton exchange membrane for the fuel battery.

Description

technical field [0001] The invention belongs to the field of new energy materials, and in particular relates to a preparation method of a modified perfluorosulfonic acid proton exchange membrane for a fuel cell. Background technique [0002] With its high conversion rate and no pollution, fuel cells have become the most competitive alternative power source in the field of internal combustion engine power. Especially the direct methanol fuel cell, which is called the sixth-generation fuel cell, has attracted great attention from many aspects such as industry and academia. The proton exchange membrane is one of its core components, which is responsible for providing channels for the migration and transport of protons and blocking fuel. Therefore, its comprehensive performance is crucial for the development of high-performance direct methanol fuel cells. An ideal proton exchange membrane should only allow (hydrated) protons to migrate and transport in its membrane matrix, whi...

Claims

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Application Information

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IPC IPC(8): H01M8/1039H01M8/1072
CPCH01M8/1039H01M8/1072Y02E60/50
Inventor 叶芳
Owner NANTONG DUOQIAN NEW MATERIAL SCI & TECH CO LTD
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