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Anion-exchange membrane and preparation and application thereof

An anion-exchange membrane and positive-ion technology, which is applied in the field of anion-exchange membranes for alkaline fuel cells and liquid flow energy storage batteries and their preparation, can solve problems such as high cost, inability to ensure uniform brushing, and complex raw materials, and achieve improved The effect of stability

Active Publication Date: 2012-05-16
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

The highest ion exchange capacity of the anion membrane prepared by this technology is 1.66mmol / g, and the conductivity and fuel cell performance of the membrane have not been reported; in addition, the raw materials used are complicated and the cost is high, and the brushing of the mixed slurry on the reinforced mesh cannot guarantee uniformity

Method used

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  • Anion-exchange membrane and preparation and application thereof
  • Anion-exchange membrane and preparation and application thereof
  • Anion-exchange membrane and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 3 g of polysulfone was dissolved in 120 ml of chloroform (dried to remove water in advance), and 240 microliters of SnCl were added to the resulting solution under nitrogen protection, and then 5 ml of chloromethyl methyl ether were slowly added; stirred at 50° C. for 12 hours, the The resulting solution was precipitated in 400 ml of rapidly stirred methanol, stirred overnight, then filtered, and washed 3-5 times with methanol, and finally the white precipitate was vacuum-dried at 60°C for 12 hours; Chloromethyl polysulfone.

[0039] Weigh 0.5 g of the product obtained above, use DMAc as a solvent to prepare a solution with a concentration of 10% (w / v), add 120 microliters of 1-methylimidazole to it, stir at 25°C for 12 hours, and then cast on a glass plate Film formation, drying at 60°C for 24 hours, then vacuum drying at 100°C for 12 hours; finally immersion in 0.5M NaOH aqueous solution at 25°C for 24 hours.

[0040] The IEC of the obtained anionic membrane was 1.27...

Embodiment 2

[0042] 3 g of polysulfone was dissolved in 120 ml of chloroform (dried to remove water in advance), and 240 microliters of SnCl4 was added to the resulting solution under nitrogen protection, and then 5 ml of chloromethyl methyl ether was slowly added; stirred at 50 ° C for 21 hours, the The resulting solution was precipitated in 400 ml of rapidly stirred methanol, stirred overnight, then filtered, and rinsed with methanol 3-5 times, and finally the white precipitate was vacuum-dried at 60°C for 12 hours; the product was chloromethyl degree (DCM) 1.40 Chloromethyl polysulfone.

[0043] Weigh 0.5 g of the product obtained above, use DMAc as a solvent to prepare a solution with a concentration of 10% (w / v), add 120 microliters of 1-methylimidazole to it, stir at 25°C for 12 hours, and then cast on a glass plate Film formation, drying at 60°C for 24 hours, and vacuum drying at 100°C for 12 hours to obtain a Cl-type anion membrane.

[0044] The ionic conductivity of the obtained ...

Embodiment 3

[0046] 2 g of polysulfone was dissolved in 80 ml of chloroform (dried to remove water in advance), and 120 microliters of SnCl4 was added to the resulting solution under nitrogen protection, and then 3.4 ml of chloromethyl methyl ether was slowly added; stirred at 50 ° C for 12 hours, the The resulting solution was precipitated in 300 ml of rapidly stirred methanol, stirred overnight, then filtered, and rinsed with methanol 3-5 times, and finally the white precipitate was vacuum-dried at 60°C for 12 hours; the product was chloromethyl degree (DCM) 1.14 Chloromethyl polysulfone.

[0047] Weigh 0.25 g of the product obtained above, use DMAc as a solvent to prepare a solution with a concentration of 5% (w / v), add 60 microliters of 1-methylimidazole to it, stir at 25°C for 12 hours, and then cast on a glass plate Film formation, drying at 60°C for 30 hours, and vacuum drying at 100°C for 12 hours to obtain a Cl-type anion membrane.

[0048] The resulting anion membrane assembled ...

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Abstract

The invention relates to an anion-exchange membrane and a preparation and application thereof, and provides an anion-exchange membrane with a side chain containing multi-nitrogen heterocycle cation as an ion guide group, and a preparation method of the anion-exchange membrane. A route of firstly salifying and then making the membrane is adopted in the preparation method of the anion-exchange membrane, wherein a salifying process is a homogeneous reaction which is easy to carry out; and a microphase separation structure is easy to form in a casting membrane-forming process, thus conductance property of the anion-exchange membrane is facilitated to be improved, and the anion-exchange membrane has higher conductivity and stability.

Description

technical field [0001] The invention relates to the field of membrane materials for fuel cells and liquid flow energy storage batteries. Specifically, it relates to an anion exchange membrane for alkaline fuel cell and liquid flow energy storage battery, its preparation method and application. Background technique [0002] Fuel cell technology is a new type of energy technology that uses electrochemical reactions to convert chemical energy stored in fuel into electrical energy. It is one of the better solutions to energy and environmental problems. Although the traditional proton exchange membrane fuel cell (Proton Exchange Membrane Fuel Cell, PEMFC) has the advantages of high energy conversion efficiency, high energy density, and environmental friendliness, it is highly dependent on noble metal catalysts, and the cost is high, making the battery commercial and practical and commercialization are severely limited. In this regard, the alkaline fuel cell (AEMFC) with anion e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D67/00B01J41/12C08J7/12H01M8/02H01M2/16B01J41/13H01M8/0289H01M8/102H01M8/1069
CPCY02E60/12Y02E60/50
Inventor 张华民张凤祥曲超
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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