Alkaline fuel cell anion exchange membrane and preparation method thereof

An anion exchange membrane and ion exchange technology, applied in the field of alkaline fuel cell anion exchange membrane and its preparation, can solve the problems of low ion conductivity, fragility, and poor mechanical properties, so as to improve ion conductivity and mechanical properties , the effect of excellent film-forming ability

Inactive Publication Date: 2021-06-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the most studied anion exchange membrane materials mainly include polyphenylene oxide, polyether ketone, polyetherether ketone, polyvinyl alcohol and polysulfone, among which polysulfone (PSU) is characterized by its low price, excellent thermal properties and mechanical properties. It is widely used in fuel cells; however, polysulfone-based anion exchange membranes undergo chloromethylation of benzene rings and quaternization of benzyl chlorides during the preparation process, and the chloromethyl ether used in the chloromethylation process It is toxic and carcinogenic, and most of the reported polysulfone-based anion exchange membranes are brittle and fragile after absorbing water, with poor mechanical properties and low ion conductivity
[0005] CN202010752234.7 and CN202010753905.1 respectively disclose a polyvinyl alcohol / polyquaternium anion exchange membrane for anion exchange membrane fuel cells and a polyvinyl alcohol / polyquaternium for anion exchange membrane fuel cells The preparation method of ammonium salt anion exchange membrane, these two documents adopt PVA / PQ-10 to prepare anion exchange membrane, although its disclosed anion exchange membrane can be used for fuel cell, but, this anion exchange membrane mechanical property is poor, chemical stability and poor electrical performance

Method used

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  • Alkaline fuel cell anion exchange membrane and preparation method thereof
  • Alkaline fuel cell anion exchange membrane and preparation method thereof
  • Alkaline fuel cell anion exchange membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0089] The preparation of embodiment 1CMPSU

[0090] S11: Weigh 30g PSU and add to 750mL CHCl 3 In a three-necked flask, mechanically stirred for 2h to dissolve completely.

[0091] S12: Weigh 20.1g of POM, slowly add it into the three-necked flask, continue to stir for 1h, and then slowly add 0.78mL SnCl to the three-necked flask dropwise. 4 , A condenser was connected to the three-necked flask, and the temperature of the three-necked flask was raised to 55° C. for condensation and reflux. S13: Mix 85.5mL TMCS with 10-20mLCHCl 3 After mixing evenly, slowly add dropwise into a three-necked flask, and continue to stir for 72 hours.

[0092] S14: Filter the reaction mixture solution after the reaction with a filter screen to remove a little reaction residue.

[0093] S15: Slowly pour the filtered reaction solution into a sufficient amount of absolute ethanol to form a white flocculent precipitate (reaction product CMPSU).

[0094]S16: mechanical stirring is performed to cle...

Embodiment 2

[0097] S21: get the CMPSU prepared in embodiment 1.

[0098] S22: Add CMPSU to 80mL DMSO, and mechanically stir for 4h to ensure that the two are mixed evenly and completely dissolved.

[0099] S23: quaternization and cross-linking to form a film-forming liquid:

[0100] S231: Weighing an appropriate amount of NMPD and adding it to the mixed solution formed in S22, stirring and reacting for 3 hours, and partially quaternizing the CMPSU. The chloromethyl of quaternization is 2 / 3 of all chloromethyl in CMPSU, and the quality of NMPD is determined by the molar number of the chloromethyl of quaternization in CMPSU, and NMPD molar number: QCM molar number is 1:1.

[0101] S232: Weigh an appropriate amount of TMHDA and add it to the mixed solution after S23 quaternization, continue to stir and react for 3 hours, and fully react with the unquaternized chloromethyl group in CMPSU to cross-link to form a film-forming liquid. The quality of TMHDA is determined by the number of moles o...

Embodiment 3

[0106] S21: Take PQ-10 and the CMPSU prepared in Example 1 respectively, the mass ratio of CMPSU:PQ-10 is 1:0.2, and the total mass of CMPSU and PQ-10 is 1.2g.

[0107] S22: Add CMPSU and PQ-10 to 80mL DMSO in turn, and mechanically stir for 4 hours to ensure that the two are mixed evenly and completely dissolved.

[0108] S23: quaternization and cross-linking to form a film-forming liquid:

[0109] S231: Weighing an appropriate amount of NMPD and adding it to the mixed solution formed in S22, stirring and reacting for 3 hours, and partially quaternizing the CMPSU. The chloromethyl of quaternization is 2 / 3 of all chloromethyl in CMPSU, and the quality of NMPD is determined by the molar number of the chloromethyl of quaternization in CMPSU, and NMPD molar number: QCM molar number is 1:1.

[0110] S232: Weigh an appropriate amount of TMHDA and add it to the mixed solution after S23 quaternization, continue to stir and react for 3 hours, and fully react with the unquaternized ch...

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Abstract

The invention discloses an anion exchange membrane for an alkaline fuel cell and a preparation method of the anion exchange membrane. The semi-interpenetrating quaternized polysulfone / polyquaternium-10 anion exchange membrane is a PQ-10 / CMPSU anion exchange membrane. The QPSU / PQ-10 anion exchange membrane provided by the invention has good oxidation resistance and alkali resistance, and the ionic conductivity can reach 69.91 mS / cm.

Description

technical field [0001] The invention relates to an anion exchange membrane of an alkaline fuel cell and a preparation method thereof. Background technique [0002] The extensive use of traditional fossil energy has caused serious environmental pollution and energy shortages. The research and use of renewable energy and clean energy has attracted more and more attention. Fuel cells, as an environmentally friendly energy conversion device with zero carbon emissions, can directly convert chemical energy into electrical energy, and are considered to be one of the most promising sustainable energy conversion technologies in transportation and industrial applications. According to different working environments, fuel cells can be divided into proton exchange membrane fuel cells (PEMFCs) and anion exchange membrane fuel cells (AEMFCs). Portable generators and automobiles are widely used. However, the use of noble metal catalyst Pt increases its cost, which limits the wide applica...

Claims

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Application Information

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IPC IPC(8): H01M8/1032H01M8/1027H01M8/1069H01M8/1072H01M8/1086C08G75/20
CPCH01M8/1032H01M8/1027H01M8/1069H01M8/1072H01M8/1086C08G75/20H01M2008/1095Y02E60/50
Inventor 范敏敏张明华杨召杰肖亚飞张熙
Owner SICHUAN UNIV
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