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A kind of high temperature resistant alkaline anion exchange membrane and its preparation and application

An alkaline anion, exchange membrane technology, applied in fuel cells, electrical components, electrochemical generators, etc., can solve the problems of poor electrochemical stability, low anion conductivity, easy loss of doped alkali, etc., and achieve good stability. , Overcome the effect of low anion conductivity, good thermal stability and electrochemical stability

Active Publication Date: 2011-12-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the problems of low anion conductivity existing in the prior art, poor electrochemical stability, and easy loss of doped alkali, the purpose of the present invention is to provide a high-temperature-resistant alkaline anion-exchange membrane, so that the alkaline anion-exchange membrane fuel cell Good battery performance under non-alkali conditions

Method used

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  • A kind of high temperature resistant alkaline anion exchange membrane and its preparation and application
  • A kind of high temperature resistant alkaline anion exchange membrane and its preparation and application
  • A kind of high temperature resistant alkaline anion exchange membrane and its preparation and application

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Synthesis of polyvinylimidazole: Dissolve 4g of 1-vinylimidazole and 0.05g of free radical initiator azobisisobutyronitrile in 5ml of toluene, heat at 75°C, stir with magnetic force, condense to reflux and pass into N 2 Protect. After reacting for 5 hours, the solvent was evaporated to obtain polyvinylimidazole.

[0030] Quaternization of polyvinylimidazole: Dissolve the obtained polyvinylimidazole in ethanol, add 6g bromoethane, stir magnetically at 75°C, condense and reflux and pass into N 2 Protected, reacted for 20 hours to make it quaternized. The solvent was evaporated to dryness to obtain poly-1-vinyl 3-ethylimidazole bromide as a solid substance

[0031] Preparation of blend film casting solution: take poly 1-vinyl 3-ethyl imidazolium bromide 25mg, add 10ml water, heat up to 60°C, stir magnetically to make it swell and dissolve. Take 25 mg of PBI (containing ether linkages), add it into N,N-dimethylacetamide, and raise the temperature slightly to dissolve...

Embodiment 2

[0043] Synthesis of polypropylene imidazole: dissolve 6g of 1-propenyl imidazole and 0.2g of free radical initiator azobisisoheptanonitrile in 8ml of benzene, heat at 80°C, stir with magnetic force, condense and reflux and pass into N 2 Protect. After reacting for 3 hours, the solvent was evaporated to dryness to obtain polypropylene imidazole.

[0044] Quaternization of polypropylene imidazole: Dissolve the obtained polypropylene imidazole in ethanol, add 10g of 1-chlorobutane, stir magnetically at 90°C, condense to reflux and pass into N 2 Protected, reacted for 30 hours to make it quaternized. The solvent was evaporated to dryness to obtain poly-1-propenyl 3-butylimidazole chloride as a solid substance.

[0045] Preparation of blend film casting solution: Take 40 mg of poly 1-propenyl 3-butyl imidazole chloride, add it to 12 ml of water, heat up to 50° C., and magnetically stir to make it swell and dissolve. Take 10 mg of polyethersulfone, add it to acetone, and raise th...

Embodiment 3

[0048] Synthesis of polyisobutenyl imidazole: Dissolve 8 g of isobutenyl imidazole and 0.64 g of free radical initiator dimethyl azobisisobutyrate in 30 ml of toluene, heat at 50 ° C, magnetically stir, condense and reflux and pass into N 2 Protect. After reacting for 12 hours, the solvent was evaporated to obtain polypropylene imidazole.

[0049] Quaternization of polyisobutenyl imidazole: Dissolve the obtained polypropenyl imidazole in ethanol, add 2g of chloropropane, stir magnetically at 65°C, condense and reflux and pass into N 2 protection, and reacted for 10 hours to make it quaternized. The solvent was evaporated to dryness to obtain poly-1-isobutenyl 3-propyl imidazole chloride as a solid substance.

[0050] Preparation of blend film casting solution: Take 40 mg of poly-1-isobutenyl 3-propyl imidazole chloride, add it to 4 ml of water, heat up to 80° C., and stir it magnetically to make it swell and dissolve. Take 20 mg of polyetheretherketone, add it into N-methyl...

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Abstract

The invention provides a high-temperature resistance basic anion exchange membrane, and preparation and application thereof, including synthesis of poly-R-iminazole, quaternization, preparation of a blended membrane casting solution, and membrane formation. The preparation comprises the following steps of: after dissolving, carrying out polymerization reaction under the action of a radical initiator to obtain the poly-R-iminazole, wherein R is C1-C10 chain-shaped or ring-shaped monoolefine, dissolving the obtained poly-R-iminazole, adding C1-C6 substituted halogenated hydrocarbon, and carrying out quaternization of 3-N; adding the solid into water, increasing the temperature, magnetically stirring to swell and dissolve, adding one or more of imidite, polyimide, polyether-ether-ketone and polyether sulfone into a polar organic solvent, blending the two solutions while heating, paving on a glass plate after forming emulsion, increasing the temperature through a program, and moulding. The membrane disclosed by the invention has the characteristics of easiness for forming a membrane, high conductivity and good mechanical flexibility, heat stability and electrochemical stability.

Description

technical field [0001] The invention relates to an alkaline anion exchange membrane, in particular to a high temperature resistant alkaline anion exchange membrane used in an alkaline fuel cell system and a preparation method thereof. Background technique [0002] The reported basic anion exchange membranes include quaternary ammonium anion exchange membranes, crown ether anion exchange membranes, organic-inorganic hybrid anion exchange membranes and Nafion-modified anion exchange membranes. [0003] Among them, quaternary ammonium anions generally have low ionic conductivity, thermal stability and alkali resistance stability, so that such membranes can only be used in DAFC with low working temperature (usually lower than 60°C). [0004] CN1560117A uses the chelating effect of crown ether on alkali metal or alkaline earth metal ions to fix cations on polymer chains, and free anions play the role of conducting ions. This strong basic polymer electrolyte membrane is far super...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M8/02C08F126/06C08F8/44C08L39/04C08L79/08C08L71/08C08L81/06C08J5/22H01M8/083
CPCY02E60/50Y02E60/12
Inventor 孙公权柳鹤金巍王素力
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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