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A long-chain branched double-comb polyarylindole anion exchange membrane and its preparation method

An ion-exchange membrane and long-chain branched technology, which is applied in the field of long-chain branched double-comb polyarylindole anion-exchange membrane and its preparation, can solve the problems of membrane performance impact, molecular chain degradation, etc., and achieve increased mobility, Improves ionic conductivity and alkali stability, and improves the effect of microscopic phase separation

Active Publication Date: 2022-01-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, recent studies have found that these polymer backbones containing ether oxygen bonds have the disadvantage of being easily attacked in a hot-alkali environment and causing molecular chain degradation. Therefore, it is very important to find a stable polymer conductive material
In addition, the different strategies showed that the difference in functional groups has a great influence on the performance of the membrane

Method used

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  • A long-chain branched double-comb polyarylindole anion exchange membrane and its preparation method
  • A long-chain branched double-comb polyarylindole anion exchange membrane and its preparation method
  • A long-chain branched double-comb polyarylindole anion exchange membrane and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Synthesis of polyarylindole polymer: under the protection of inert gas, 5.25g 2,3-indoledione and 5.42g biphenyl were dissolved in 6mL methylene chloride and 11mL trifluoroacetic acid, after completely dissolving, the The reaction was placed in an ice-bath environment, 25 mL of trifluoromethanesulfonic acid was slowly added, and then the temperature was gradually raised to room temperature for about 0.5 to 2 hours. When the reaction turned into a highly viscous liquid, the reaction ended, and it was poured into methanol to obtain a blocky white solid, soaked for about 12 hours, filtered and dried to obtain a crude product. Dissolve the crude product in about 120mL of NMP, pour it into methanol after completely dissolving to obtain a white fibrous solid, soak for 24 hours, filter, wash with methanol for more than three times, and dry at 60°C for 24 hours in a vacuum environment to obtain the purified polyarylene Indole polymers.

[0051] Preparation of long-chain branch...

Embodiment 2

[0056] Synthesis of polyarylindole polymer: under the protection of inert gas, 5.25g 2,3-indoledione and 5.42g biphenyl were dissolved in 6mL methylene chloride and 11mL trifluoroacetic acid, after completely dissolving, the The reaction was placed in an ice-bath environment, 25 mL of trifluoromethanesulfonic acid was slowly added, and then the temperature was gradually raised to room temperature for about 0.5 to 2 hours. When the reaction turned into a highly viscous liquid, the reaction ended, and it was poured into methanol to obtain a blocky white solid, soaked for about 12 hours, filtered and dried to obtain a crude product. Dissolve the crude product in about 120mL of NMP, pour it into methanol after completely dissolving to obtain a white fibrous solid, soak for 24 hours, filter, wash with methanol for more than three times, and dry at 60°C for 24 hours in a vacuum environment to obtain the purified polyarylene Indole polymers.

[0057] Preparation of long-chain branch...

Embodiment 3

[0062] Synthesis of polyarylindole polymer: under the protection of inert gas, 5.25g 2,3-indoledione and 5.42g biphenyl were dissolved in 6mL methylene chloride and 11mL trifluoroacetic acid, after completely dissolving, the The reaction was placed in an ice-bath environment, 25 mL of trifluoromethanesulfonic acid was slowly added, and then the temperature was gradually raised to room temperature for about 0.5 to 2 hours. When the reaction turned into a highly viscous liquid, the reaction ended, and it was poured into methanol to obtain a blocky white solid, soaked for about 12 hours, filtered and dried to obtain a crude product. Dissolve the crude product in about 120mL of NMP, pour it into methanol after completely dissolving to obtain a white fibrous solid, soak for 24 hours, filter, wash with methanol for more than three times, and dry at 60°C for 24 hours in a vacuum environment to obtain the purified polyarylene Indole polymers.

[0063] Preparation of long-chain branch...

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Abstract

The invention discloses a long-chain branched double-comb polyarylindole anion exchange membrane and a preparation method thereof, belonging to the technical field of alkaline anion exchange membranes. The invention synthesizes polyarylindole polymers containing aramid groups with good stability and mechanical properties, and then grafts the polymers with long-chain branched ionic liquids and forms membranes. The prepared membrane has better alkaline stability and higher ion conductivity, and can be applied in alkaline fuel cells.

Description

technical field [0001] The invention belongs to the technical field of basic anion exchange membranes, and relates to a long-chain branched double-comb polyarylindole anion exchange membrane and a preparation method thereof. Background technique [0002] As environmental and energy issues become increasingly prominent, fuel cells, as a clean and efficient power conversion device, are considered to be the most promising and promising solid-state and mobile applications. Among various fuel cells, alkaline fuel cells (AFCs) are considered due to their improved oxygen reduction kinetics and better fuel oxidation kinetics resulting in higher efficiencies and the ability to use low-cost non-precious metal catalysts. is an attractive option. Over the past few decades, there has been increasing interest in AFCs, especially those using anion-exchange membranes (AEMs). In AEMFCs, AEM acts as a solid electrolyte to transport hydroxide ions and prevent fuel crossover between anode and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1027H01M8/103H01M8/1072
CPCH01M8/1027H01M8/103H01M8/1072Y02E60/50
Inventor 焉晓明王凯锋贺高红代岩郑文姬阮雪华潘昱
Owner DALIAN UNIV OF TECH
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