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Ordered alkaline anion exchange membrane as well as preparation method and application thereof

A basic anion and exchange membrane technology, applied in electrochemical generators, fuel cells, electrical components, etc., can solve the problems of disorder, high tortuosity, hindering water and ion transmission, etc., to improve output performance and reduce tortuosity , Reduce the effect of mass transfer polarization loss

Active Publication Date: 2020-06-05
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

However, such channels are generally disorganized and have high tortuosity, which seriously hinders the transport of water and ions. Therefore, it is necessary to develop ordered alkaline anion exchange membranes.

Method used

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  • Ordered alkaline anion exchange membrane as well as preparation method and application thereof
  • Ordered alkaline anion exchange membrane as well as preparation method and application thereof
  • Ordered alkaline anion exchange membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve polystyrene-ethylene-butylene-styrene (SEBS) with a styrene block content of 30wt.% in organic reagent chloroform, stir mechanically, protect with nitrogen, raise the temperature to 55°C, and then add SnCl 4 and BCMB, where SEBS with chloroform, BCMB and SnCl 4 The mass volume ratios are 1g:30mL, 1g:4.6mL and 1g:2.0mL respectively, react for 12h, pour the reacted solution into anhydrous methanol, after the polymer is precipitated, suction filter, wash with deionized water to medium properties, and then dried in a vacuum oven at 60°C to obtain chloromethylated polystyrene-ethylene-butylene-styrene (CMSEBS).

[0033] Weigh 0.25 g of polystyrene-polyethylene-polybutylene triblock polymer (CMSEBS) after chloromethylation, and dissolve it in 10 mL of chloroform (under room temperature, dissolve with magnetic stirring) to obtain anion exchange Resin precursor solution. Then measure 1 mL of trimethylamine aqueous solution (mass fraction about 33%), add it to 10 mL o...

Embodiment 2

[0037] Synthesis of chloromethylated polysulfone: Weigh 5 grams of polysulfone polymer resin, dissolve it in N,N-dimethylformamide, and prepare a resin solution with a mass fraction of 5%. The catalyst anhydrous tin tetrachloride and the chloromethylation reagent chloromethyl methyl ether are added sequentially, and the reaction is carried out at room temperature for 6 hours, and the chloromethylated polysulfone is obtained after filtering, precipitating, washing and drying.

[0038] Weighed 0.25 g of chloromethylated polysulfone, and dissolved it in 10 mL of chlorobenzene (dissolved by magnetic stirring at room temperature) to obtain an anion exchange resin precursor solution. Then measure 1 mL of trimethylamine aqueous solution (mass fraction about 33%), add it to 10 mL of water for dilution, then add 0.1 g of hexadecyltrimethylammonium bromide, and stir magnetically at room temperature to dissolve. The anion exchange resin precursor solution was poured into a cylindrical wa...

Embodiment 3

[0041] Dissolve polystyrene-ethylene-butylene-styrene (SEBS) with a molecular weight of Mn≈65000 and a styrene block content of 30wt.% in organic reagent chloroform, stir mechanically, protect the temperature with nitrogen, and raise the temperature to 55°C, then add SnCl 4 and BCMB, where SEBS with chloroform, BCMB and SnCl 4 The mass volume ratios are 1g:30mL, 1g:4.6mL and 1g:2.0mL respectively, react for 12h, pour the reacted solution into anhydrous methanol, after the polymer is precipitated, suction filter, wash with deionized water to medium properties, and then dried in a vacuum oven at 60°C to obtain chloromethylated polystyrene-ethylene-butylene-styrene (CMSEBS)

[0042] Preparation of cross-linked ordered AAEM: Chloromethylated polystyrene-polyethylene-polybutylene triblock polymer and N,N,N,N-tetramethylhexamethylenediamine were selected as anion exchange The resin precursor and the functionalization reagent are respectively dissolved in chloroform and deionized w...

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Abstract

The invention relates to a preparation method of an alkaline anion exchange membrane, which comprises the following steps of: respectively dissolving an anion exchange resin precursor and a functionalization reagent in an oil phase and a water phase, carrying out functionalization reaction at a two-phase interface by using the resin precursor and the functionalization reagent, and carrying out in-situ self-assembly to form the membrane. According to the method, the problem of gel generated in a traditional homogeneous solution functionalization reaction is solved, and the prepared alkaline anion exchange membrane is high in ordering degree, has hierarchical pore distribution and is controllable in thickness; and the membrane has high ionic conductivity and good water transport characteristics, and has good performances when used in alkaline anion exchange membrane fuel cells.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to an ordered alkaline anion exchange membrane and its preparation method and application. Background technique [0002] A fuel cell is a clean energy technology that directly converts fuel chemical energy into electrical energy. In recent years, due to the dual pressure of energy shortage and environmental degradation, fuel cell technology has been widely concerned by governments and enterprises in various countries and has been rapidly developed, and the technical bottleneck has been continuously broken through. At present, it is already in the critical period of commercial introduction, but the cost problem still remains hinder its large-scale application. Alkaline anion exchange membrane fuel cell (AAEMFC) has become a new hot spot in the field of fuel cells due to the use of non-precious metal catalysts, which can greatly reduce its cost, but its performance sti...

Claims

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Application Information

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IPC IPC(8): H01M8/1018H01M8/1069C08J5/22
CPCC08J5/2231C08J5/2256H01M8/1018H01M8/1069Y02E60/50
Inventor 俞红梅高学强谢峰覃博文郝金凯姚德伟秦晓平邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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