A hydroxide ion exchange membrane for preparing hydrogen for fuel cells and a preparation method thereof

A technology for ion exchange membranes and fuel cells, which is applied in the field of preparation of hydroxide ion exchange membranes for hydrogen used in fuel cells and its preparation. It can solve the problems of difficult control of electrical conductivity and mechanical properties, low tolerance, and complicated preparation. Achieve the effects of improving hydrophilicity and anion permeability, improving tolerance and stability, and good application prospects

Inactive Publication Date: 2018-12-14
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the diaphragm materials for hydrogen production by electrolysis of water in the prior art, especially the anion exchange membranes of quaternary ammonium salt modified polymers, have low tolerance in hot alkali environment, poor thermal stability, poor electrical conductivity and mechanical properties. Difficult to control and complicated to prepare, which limits its application in industrial production

Method used

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  • A hydroxide ion exchange membrane for preparing hydrogen for fuel cells and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Under nitrogen atmosphere, mix 17kg N-vinylimidazole and 13 kg iodomethane, stir at 150r / min for 33min, then add 27 kg styrene, 40 kg acrylonitrile, 0.5 kg benzoyl isobutyl ether, 2 kg of benzoyl peroxide and 0.5 kg of triethanolamine were ultrasonically oscillated at a frequency of 260 kHz for 17 minutes to obtain a homogeneous solution; then the glass mold was immersed in the homogeneous solution. 2 Irradiate under ultraviolet light at a distance of 42cm for 7min. After the reaction is completed, take out the glass mold, wash it with deionized water, soak it in sodium hydroxide solution, and heat it in a water bath at 82°C for 13h; finally take out the glass mold, Wash with deionized water until the washing solution is neutral, remove the glass mold, and obtain a hydroxide ion exchange membrane.

[0031] testing method:

[0032] (1) Thermal stability (mass loss rate): A thermogravimetric analyzer (DMA / SDDTA861e) was used to carry out a thermal stability test, and 10 ...

Embodiment 2

[0036] Under nitrogen atmosphere, mix 15 kg N-vinylimidazole and 12 kg methyl iodide, stir at 130 r / min for 40 min, then add 25 kg styrene, 46 kg acrylonitrile, 0.5 kg benzoyl isobutyl ether, 1 kg of dicumyl peroxide and 0.5kg of 2,4,6-tris(dimethylaminomethyl)phenol were ultrasonically oscillated for 20 minutes under an ultrasonic frequency of 200kHz to obtain a homogeneous solution; then the glass mold was immersed in the homogeneous solution , at an irradiation intensity of 800μW / cm 2 Irradiate under ultraviolet light at a distance of 30cm for 10min. After the reaction is completed, take out the glass mold, wash it with deionized water, soak it in sodium hydroxide solution, and heat it in a water bath at a temperature of 70°C for 14h; finally take out the glass mold, Wash with deionized water until the washing solution is neutral, remove the glass mold, and obtain a hydroxide ion exchange membrane.

[0037] The test method is consistent with Example 1, and the obtained dat...

Embodiment 3

[0039] Under a nitrogen atmosphere, mix 18 kg N-vinylimidazole and 16 kg methyl iodide, stir at 180 r / min for 20 min, then add 30 kg styrene, 32 kg acrylonitrile, 1 kg benzoyl isobutyl ether, 2 kg diethylenetriamine, 1kg triethylenediamine, and ultrasonically vibrate for 15 minutes under ultrasonic frequency of 300kHz to obtain a homogeneous solution; then immerse the glass mold in the homogeneous solution, 2 irradiate with ultraviolet light at a distance of 50cm for 5min, take out the glass mold after the reaction is completed, wash it with deionized water, soak it in sodium hydroxide solution, and heat it in a water bath at a temperature of 90°C for 10h; finally take out the glass mold, Wash with deionized water until the washing solution is neutral, remove the glass mold, and obtain a hydroxide ion exchange membrane.

[0040] The test method is consistent with Example 1, and the obtained data are shown in Table 1.

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Abstract

The invention belongs to the technical field of fuel cells, and provides a hydroxide ion exchange membrane for preparing hydrogen for fuel cells and a preparation method thereof. The method comprisescoupling a N-vinylimidazole with methyl iodide to alkylate N-vinylimidazole, copolymerization of styrene and acrylonitrile under ultrasonic vibration, crosslinking reaction with alkylated imidazole, and replacement of iodine with hydroxyl by sodium hydroxide. Compared with the traditional method, the prepared hydroxide ion exchange membrane of the present invention, At that same time, the raw material is environmentally friendly and pollution-free, the membrane can be directly synthesize at one time without subsequent membrane formation, the preparation process is simple, the conductivity andthe mechanical property are easy to control, and the membrane is suitable for large-scale industrial production. The invention has excellent hydrophilicity and the anion transmission rate, and remarkably improves the alkali tolerance and stability of the membrane material, and the raw material is environmentally friendly and pollution-free, and the membrane can be directly synthesized at one time.

Description

technical field [0001] The invention belongs to the technical field of fuel cells and provides a hydroxide ion exchange membrane for preparing hydrogen used in fuel cells and a preparation method. Background technique [0002] Fuel cell is a promising new power source. Generally, hydrogen, carbon, methanol, borohydride, coal gas or natural gas are used as fuel as the negative electrode, and oxygen in the air is used as the positive electrode. It has high conversion efficiency, large capacity, It has the advantages of high specific energy, wide power range, and no charging, but due to high cost and complicated system, it is limited to some special purposes, such as spaceships, submarines, military, TV transfer stations, lighthouses, and buoys. Among them, a hydrogen fuel cell is a battery that uses hydrogen as a fuel to store energy, and has received widespread attention for its excellent performance. [0003] As an efficient, clean and ideal secondary energy source, hydroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1072
CPCH01M8/1072Y02E60/50Y02P70/50
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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