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Alkaline anion exchange membrane for fuel cell and preparation method

An alkaline anion and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve problems such as poor stability of the main chain, and achieve the effects of improved conductivity, convenient operation, and high thermal stability

Active Publication Date: 2021-04-27
安徽知凸凸科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The basic anion exchange membrane is composed of polymer backbone and OH - Conductive active sites, commonly used main chains are polysulfone, polyethersulfone, polyether ketone, polyphenylene ether, these main chain structures are susceptible to OH due to the presence of heteroatoms - attacks, resulting in poor stability of the main chain, the commonly used OH - Conductive active sites are cationic functional groups such as quaternary ammonium salts and quaternary phosphorus salts

Method used

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  • Alkaline anion exchange membrane for fuel cell and preparation method

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Effect test

Embodiment 1

[0021] 1).Phosphazene substitution reaction: Put 12.6g of sodium metal sodium to remove surface oxide into a flask, add anhydrous tetrahydrofuran THF, pass nitrogen gas, slowly drop 54g of p-cresol anhydrous THF solution into the above flask, and reflux After reacting for 8h, sodium p-toluate nucleophile was obtained after the reaction. Put another 3.04g of sodium metal into the flask, add anhydrous tetrahydrofuran THF, blow in nitrogen gas, slowly drop 15.8g of diethylene glycol monovinyl ether anhydrous THF solution into the above flask, reflux for 8h, after the reaction Sodium diethylene glycol monovinyl ether nucleophile is obtained. Weigh 34.76g of hexachlorocyclotriphosphazene HCCP, put it into a flask and add anhydrous THF to dissolve it, slowly drop the sodium p-cresolate reagent into the flask under nitrogen, and react for 12 hours after the dropwise addition. Slowly drop the diethylene glycol monovinyl ether sodium reagent into the flask to replace the remaining P-C...

Embodiment 2

[0026] 1).Phosphazene substitution reaction: Put 12.6g of sodium metal sodium to remove surface oxide into a flask, add anhydrous tetrahydrofuran THF, pass nitrogen gas, slowly drop 54g of p-cresol anhydrous THF solution into the above flask, and reflux After reacting for 8h, sodium p-toluate nucleophile was obtained after the reaction. Put another 3.04g of sodium metal into the flask, add anhydrous tetrahydrofuran THF, blow in nitrogen gas, slowly drop 15.8g of diethylene glycol monovinyl ether anhydrous THF solution into the above flask, reflux for 8h, after the reaction Sodium diethylene glycol monovinyl ether nucleophile is obtained. Weigh 34.76g of hexachlorocyclotriphosphazene HCCP, put it into a flask and add anhydrous THF to dissolve it, slowly drop the sodium p-cresolate reagent into the flask under nitrogen, and react for 12 hours after the dropwise addition. Slowly drop the diethylene glycol monovinyl ether sodium reagent into the flask to replace the remaining P-C...

Embodiment 3

[0031] 1).Phosphazene substitution reaction: Put 12.6g of sodium metal sodium to remove surface oxide into a flask, add anhydrous tetrahydrofuran THF, pass nitrogen gas, slowly drop 54g of p-cresol anhydrous THF solution into the above flask, and reflux After reacting for 8h, sodium p-toluate nucleophile was obtained after the reaction. Put another 3.04g of sodium metal into the flask, add anhydrous tetrahydrofuran THF, blow in nitrogen gas, slowly drop 15.8g of diethylene glycol monovinyl ether anhydrous THF solution into the above flask, reflux for 8h, after the reaction Sodium diethylene glycol monovinyl ether nucleophile is obtained. Weigh 34.76g of hexachlorocyclotriphosphazene HCCP, put it into a flask and add anhydrous THF to dissolve it, slowly drop the sodium p-cresolate reagent into the flask under nitrogen, and react for 12 hours after the dropwise addition. Slowly drop the diethylene glycol monovinyl ether sodium reagent into the flask to replace the remaining P-C...

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Abstract

The invention relates to an alkaline anion exchange membrane for a fuel cell and a preparation method of the alkaline anion exchange membrane. The membrane is prepared by the following steps: 1) reacting p-methylphenol and diethylene glycol monovinyl ether with hexachlorocyclotriphosphazene HCCP according to a certain ratio; 2) copolymerizing the product obtained in the step 1) and styrene according to different feeding ratios; 3) performing methyl bromination on the polymer in the step 2) by NBS; and 4) carrying out quaternization reaction on the polymer obtained in the step 3) by using tertiary amine, and alkalifying in a dilute sodium hydroxide solution to obtain the alkaline anion exchange membrane. According to the method, the main chain is free of heteroatoms, cyclotriphosphazene is grafted with high-density conduction sites, the alkali resistance and the conductivity are improved to a certain extent, the thermal stability is high, the used raw materials are simple and easy to obtain, and the operation is convenient.

Description

technical field [0001] The invention belongs to the field of basic anion exchange membranes, and relates to a co-substituted phosphazene with carbon-carbon double bond linear alcohol and p-cresol, which uses hexachlorocyclotriphosphazene as a carrier and produces carbon-carbon double bond linear alcohol and p-cresol through nucleophilic substitution reaction, and contains carbon-carbon double bond Phosphazene and styrene are polymerized, followed by NBS bromination, tertiary amine quaternization, and alkalization to prepare anion exchange membranes. Background technique [0002] Alkaline anion exchange membrane fuel cell, as a device that converts chemical energy stored in fuel such as hydrogen into electrical energy, is widely concerned by countries all over the world. It is considered to be one of the most promising alternatives to traditional energy and environmentally friendly chemical power sources. one. Among them, the alkaline anion exchange membrane is a key compone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22C08F230/02C08F212/08C08F8/44C08F8/30H01M8/1072C08L43/02
CPCC08J5/2243C08F230/02C08F8/44C08F8/30H01M8/1072C08J2343/02C08F212/08Y02E60/50
Inventor 蔡名辉张金闫丽丽
Owner 安徽知凸凸科技服务有限公司
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