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Anion exchange membrane with strong rigid structure and preparation method and application thereof

A technology of anion exchange membrane and rigid structure, which is applied in the field of anion exchange membrane with strong rigid structure and its preparation, which can solve the problems of limiting the performance and application of AEMs, the inability to make the membrane into ultra-thin layers, and insufficient rigidity, etc., and achieve excellent power density. and life, excellent life, and the effect of mild polymerization conditions

Inactive Publication Date: 2021-11-02
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the rigidity of AEMs is not enough to make the film into an ultra-thin layer, which limits the better improvement of AEMs performance and application, the overall performance of AEMs must be further improved to achieve commercialization to meet future development needs

Method used

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  • Anion exchange membrane with strong rigid structure and preparation method and application thereof
  • Anion exchange membrane with strong rigid structure and preparation method and application thereof
  • Anion exchange membrane with strong rigid structure and preparation method and application thereof

Examples

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Effect test

example 1

[0039] An anion exchange membrane with a strong rigid structure has a thickness of 4-100 μm, a Young's modulus of 2000-2200 MPa, a tensile strength of 80-100 MPa, and a copolymer comprising the following repeating structural units:

[0040]

[0041] where Ar is a divalent organic group containing an aromatic ring, R 1 and R 2 Represents the same or different substituents, n represents the degree of polymerization, which is a positive integer from 10 to 200, the weight average molecular weight is between 5000 and 800000, m is the molar percentage of the part containing p-quaterphenyl in the homopolymer, m Any number from 0 to 100.

[0042] The Ar is any one of the following groups:

[0043]

[0044]

[0045] The R 1 , R 2 Any one of the following groups:

[0046]

[0047] where X - on behalf of Br - , I - , Cl - , OH - 、HCO 3 - , and CO 3 2- , y=a positive integer between 1 and 10, R 3 , R 4 , R 5 , R 6 , R 7 are independently substituted by hydro...

example 2

[0060] A method for preparing an anion-exchange membrane containing a strong rigid structure, comprising the following steps:

[0061] (1) At room temperature, first dissolve p-quaterphenyl in dichloromethane, stir mechanically for 1 h, then add 7-bromo-1,1,1-trifluoro-2-heptanone monomer, and also dissolve in In the aforementioned solution, the aryl ketone molar ratio is 1:1.5, and the solution concentration is controlled at 20wt%;

[0062] (2) Add trifluoromethanesulfonic acid (TFSA) and trifluoroacetic acid (TFA) dropwise to the solution in step (1) at 0°C. The polymerization was initiated at -15°C, and then reacted at room temperature for 24h. After the reaction is completed, the solution is poured into methanol or ethanol to obtain a fibrous polymer. After several precipitation washes, wash with 1M potassium carbonate solution at 50°C to remove excess acid in the solution, filter and polymerize the obtained fibrous solid The product was boiled with water, filtered, and ...

example 3

[0072] At room temperature, first dissolve p-quaterphenyl in dichloromethane, stir mechanically for 0.5h, then add N-butyl-4-piperidone monomer, and dissolve in the aforementioned solution as well. The molar ratio of aryl ketone is 1:2, the solution concentration is controlled at 20wt%; the rest of the experimental steps and application steps are the same as Example 1.

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Abstract

The invention relates to the field of fuel cells, in particular to an anion exchange membrane with a strong rigid structure and a preparation method and application thereof. In order to improve the conductivity and the stability of hydroxyl, p-quaterphenyl is polymerized with different aryl monomers and ketone monomers, the main chain of p-quaterphenyl is composed of a high-molecular-weight ether-bond-free, rigid and hydrophobic aryl skeleton, positive ions with high alkali stability are combined, and the high rigidity of p-quaterphenyl is reserved. The obtained anion exchange membrane of the polyarylene piperidine homopolymer or copolymer has relatively high ionic conductivity, relatively good crystallinity, good stability and strong rigidity, can be made ultrathin and has certain stiffness, and the ion exchange membrane has a good application prospect in the field of fuel cells.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to an anion exchange membrane with a strong rigid structure, a preparation method and application. Background technique [0002] With the growing demand for alternative energy sources worldwide, fuel cell technology is expected to become a more promising way of environmentally friendly energy conversion for transportation and stationary applications due to its high energy conversion efficiency. Alkaline anion membrane fuel cells (AAEMFCs) can improve redox kinetics in alkaline operating environment; at the same time, they can use cheap non-platinum metals (such as silver Ag, cobalt Co or nickel Ni) as electrocatalysts, thus enabling Reducing the technical cost of fuel cells has attracted much attention in recent years. As the core key component of AAEMFC, the anion exchange membrane (AEM) can not only separate the cathode from the anode, but also - ) and other reactants conduct conductio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22C08L65/00H01M8/083C25B13/08C25B1/04
CPCC08J5/2287C08J5/2293C08J5/2256C08J5/2262H01M8/083C25B13/08C25B1/04C08J2365/00Y02E60/36Y02E60/50
Inventor 李南文刘敏
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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