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Adamantane-containing random anion exchange membrane and preparation method thereof

An anion exchange membrane and adamantane technology, which is applied in the field of alkaline fuel cells, can solve the problems of delaying large-scale, commercialized high-performance anion exchange membranes, increasing water content and swelling, and decreasing fuel cell performance. Formation of ion transport channels, formation enhancement, effects of increasing density and aggregation

Pending Publication Date: 2022-06-28
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes making certain types of materials called ammonium sulfate or other alkali metal salts capable of forming tiny porous microspheres when heat treated under specific conditions. These small particles help create stable liquid mixtures without any harmful side products such as halides from cathode ray tubes during manufacturing processes. Additionally, this new material allows for precise control over how it forms these minute pores while maintaining its ability to absorb oxygen gas effectively. Overall, this technical results improve the properties of various materials made up of these special compounds.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the properties of current AEMs used for fuel cells while maintaining good electrochemistry or reducing costs associated with manufacturing them at scale.

Method used

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  • Adamantane-containing random anion exchange membrane and preparation method thereof
  • Adamantane-containing random anion exchange membrane and preparation method thereof
  • Adamantane-containing random anion exchange membrane and preparation method thereof

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Embodiment 1

[0046] This embodiment takes the preparation method for synthesizing adamantane-containing random anion exchange membranes with x=0.2 as an example, the structural formula is as follows, and the specific preparation method includes the following steps:

[0047]

[0048] Among them, x=0.2, Ar 1 and Ar 2 The structure is a P 1 for b1 i.e. R is H or

[0049] 1) Synthesis of polymer: 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane (1.1375g, 4mmol, that is, n=20 in nx), 2,2-bis( 4-Hydroxyphenyl)adamantane (ADM) (5.1268 g, 16 mmol) and 4,4'-difluorodiphenylsulfone (5.085 g, 20 mmol) under nitrogen and anhydrous potassium carbonate (3.455 g, 25 mmol) and In the presence of 12.5mL of toluene, dissolved in 20mL of N,N-dimethylacetamide, reacted at 145°C for 4h, then heated to 165°C for 20h, stopped the reaction, cooled to room temperature, and poured the reaction solution into methanol aqueous solution (The volume ratio of methanol to water is 1:1) to obtain a solid precipita...

Embodiment 2

[0055] This embodiment takes the preparation method of synthesizing adamantane-containing random anion exchange membranes with x=0.3 as an example, the structural formula is as follows, and the specific preparation method includes the following steps:

[0056]

[0057] Among them, x=0.3, Ar 1 and Ar 2 The structure is a P 1 for b1 i.e. R is H or

[0058] 1) Synthesis of polymer: 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane (1.7063g, 6mmol, n=20), 2,2-bis(4-hydroxyl) Phenyl)adamantane (ADM) (4.8861 g, 14 mmol) and 4,4'-difluorodiphenyl sulfone (5.085 g, 20 mmol), under nitrogen and anhydrous potassium carbonate (3.455 g, 25 mmol) and 12.5 mL of toluene In the presence of , dissolved in 20 mL of N,N-dimethylacetamide, reacted at 145 °C for 4 h, then heated to 165 °C for 20 h, stopped the reaction, cooled to room temperature, and poured the reaction solution into methanol aqueous solution (methanol and The volume ratio of water is 1:1) to obtain a solid precipitate, ...

Embodiment 3

[0064] This embodiment takes the preparation method of synthesizing adamantane-containing random anion exchange membranes with x=0.5 as an example, the structural formula is as follows, and the specific preparation method includes the following steps:

[0065]

[0066] Among them, x=0.5, Ar 1 and Ar 2 The structure is a P 1 for b1 i.e. R is H or

[0067] 1) Synthesis of polymer: 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane (2.8439g, 10mmol, n=20), 2,2-bis(4-hydroxyl) Phenyl)adamantane (ADM) (3.2043 g, 10 mmol) and 4,4'-difluorodiphenylsulfone (5.085 g, 20 mmol), under nitrogen protection and anhydrous potassium carbonate (3.455 g, 25 mmol) and 12.5 mL of toluene In the presence of , dissolved in 20 mL of N,N-dimethylacetamide, reacted at 145 °C for 4 h, then heated to 165 °C for 20 h, stopped the reaction, cooled to room temperature, and poured the reaction solution into methanol aqueous solution (methanol and The volume ratio of water is 1:1) to obtain a solid pr...

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Abstract

The invention discloses an adamantane-containing random anion exchange membrane and a preparation method thereof. The adamantane-containing random anion exchange membrane can be used for alkaline fuel cells. The anion exchange membrane is made of a polyarylether random polymer containing an adamantyl group, the structure of the anion exchange membrane comprises a hydrophilic part and a hydrophobic part, and the adamantyl group with rigidity and large steric hindrance is introduced into the hydrophobic section of the polymer. The preparation method mainly comprises the following steps: (1) synthesizing an adamantyl-containing polyarylether polymer; (2) bromination modification of the polymer; and (3) preparing the adamantane-containing random anion exchange membrane. The prepared anion exchange membrane has a developed ion transmission channel, has the characteristics of high water content and low swelling rate, 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

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Claims

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Application Information

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Owner HUAQIAO UNIVERSITY
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