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Adamantyl block type anion exchange membrane and preparation method thereof

An adamantyl block-type, anion-exchange membrane technology, applied in electrochemical generators, fuel cells, electrical components, etc., can solve the problem of AEMs expansion dimensional stability, delayed large-scale anion-exchange membranes, poor alkali durability, etc. Problems, to achieve the effect of good conductivity, high bromination reaction activity, increase density and aggregation degree

Pending Publication Date: 2022-07-01
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under high ion exchange capacity conditions, AEMs also have a tendency to severely swell and decrease in dimensional stability
Existing anion exchange membranes still face some challenges, such as the trade-off between dimensional stability and electrical conductivity, and poor alkali durability, which delays the realization of large-scale, commercial high-performance anion exchange membranes, and in practical industrial applications facing great challenges

Method used

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  • Adamantyl block type anion exchange membrane and preparation method thereof
  • Adamantyl block type anion exchange membrane and preparation method thereof
  • Adamantyl block type anion exchange membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] This embodiment takes the preparation method of synthesizing an adamantyl block type anion exchange membrane with m=10 and n=10 as an example. The structural formula is as follows, and the specific preparation method includes the following steps:

[0049]

[0050] where m=10, n=10, Ar 1 and Ar 2 The structure is a R is H or

[0051] 1) Synthesis of hydrophilic segment: 2,2-bis(2,6-dimethyl-4-hydroxyphenyl)adamantane (MADM) (10mmol, 3.7654g), 4,4'-difluorodiphenyl Sulfone (11 mmol, 2.7967 g), 3.455 g of anhydrous potassium carbonate and 10 mL of toluene were dissolved in 30 mL of N,N-dimethylacetamide, under nitrogen protection, and reacted at 140 °C for 3.5 h, then slowly heated to 160 °C for 20 h, and then Add 4,4'-difluorodiphenylsulfone (0.55mmol, 0.1398g), i.e., 5% (m+1) molar amount, continue the reaction at 160°C for 1h, stop heating, and wait for the reaction system to cool to room temperature naturally. After pouring into methanol aqueous solution for ...

Embodiment 2

[0059] In this example, the preparation method for synthesizing an adamantyl block type anion exchange membrane with m=10 and n=5 is taken as an example. The structural formula is as follows, and the specific preparation method includes the following steps:

[0060]

[0061] where m=10, n=5, Ar 1 The structure is a Ar 2 The structure is a R is H or

[0062] 1) Synthesis of hydrophilic segment: 2,2-bis(2,6-dimethyl4-hydroxyphenyl)adamantane (MADM) (10mmol, 3.7654g), 4,4'-difluorodiphenylsulfone (11mmol, 2.7967g), 3.455g of anhydrous potassium carbonate and 10mL of toluene were dissolved in 30mL of N,N-dimethylacetamide, under nitrogen protection, firstly reacted at 140°C for 3.5h, then slowly heated to 160°C for 20h, and then added 4,4'-Difluorodiphenylsulfone (0.55mmol, 0.1398g), i.e. 5% (m+1) molar amount, continued the reaction at 160°C for 1h, stopped heating, and waited for the reaction system to cool to room temperature naturally, pour the reaction solution int...

Embodiment 3

[0070] In this example, the preparation method for synthesizing an adamantyl block type anion exchange membrane with m=10 and n=15 is taken as an example. The structural formula is as follows, and the specific preparation method includes the following steps:

[0071]

[0072] where m=10, n=15, Ar 1 The structure is a Ar 2 The structure is a R is H or

[0073] 1) Synthesis of hydrophilic segment: 2,2-bis(2,6-dimethyl4-hydroxyphenyl)adamantane (MADM) (10 mmol, 3.7654 g), 4,4'-difluorodiphenylsulfone (11 mmol, 2.7967 g), 3.455 g of anhydrous potassium carbonate and 10 mL of toluene were dissolved in 30 mL of N,N-dimethylacetamide under nitrogen protection, and then reacted at 140 °C for 3.5 h, then slowly heated to 160 °C for 20 h, and then added 4,4'-Difluorodiphenylsulfone (0.55mmol, 0.1398g), i.e. 5% (m+1) molar amount, continued the reaction at 160°C for 1h, stopped heating, and waited for the reaction system to cool to room temperature naturally, pour the reaction...

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Abstract

The invention discloses an adamantyl block type anion exchange membrane and a preparation method thereof. The adamantyl block type anion exchange membrane can be used for alkaline fuel cells. The material of the anion exchange membrane is an adamantyl block type polyarylether polymer, the structure of the adamantyl block type polyarylether polymer comprises a long-sequence hydrophilic segment and a long-sequence hydrophobic segment, and rigid and large-steric-hindrance adamantyl groups are introduced into the hydrophilic segment and the hydrophobic segment of the block polymer. The preparation method mainly comprises the following steps: (1) synthesizing an adamantane-containing phenol monomer; (2) synthesizing an adamantyl polyarylether polymer; (3) bromination modification of the polymer; and (4) preparing the adamantyl block type anion exchange membrane. The prepared anion exchange membrane has a developed ion transmission channel, has the characteristics of high water content and low swelling degree, does not use a highly toxic carcinogenic chloromethyl ether reagent in the preparation process, and has a wide application prospect in the field of alkaline fuel cells.

Description

technical field [0001] The invention belongs to the technical field of alkaline fuel cells, and in particular relates to an anion exchange membrane. Background technique [0002] Fuel cell is a power generation device that uses chemical reaction technology to directly and efficiently convert chemical energy stored in fuel and oxidant into electrical energy, and is regarded as the fourth generation power generation technology. As a clean and efficient renewable energy conversion device, fuel cells have received extensive attention in the past decade due to their high efficiency, high energy density, environmental friendliness, and portability. Among various types of fuel cells, alkaline anion exchange membrane fuel cells (AAEMFCs), which have the characteristics of high efficiency, low cost and less pollution, have been widely discussed and studied by many scholars. As one of the core structures of alkaline anion exchange membrane fuel cells, the anion exchange membrane (AEM...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22C08L81/06C08G75/23H01M8/083
CPCC08J5/2256C08G75/23H01M8/083C08J2381/06H01M2300/0082
Inventor 赖傲楠王贞饶小平周树锋
Owner HUAQIAO UNIVERSITY
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