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循环亚利法四元功能化聚 ((oxindole biphenyl) 基离子交换膜用于水电解:稳定性和性能

Sara Gjoshi¹, Paraskevi Loukopoulou¹, Michaela Plevova²

¹Department of Chemistry, University of Patras, GR-26504 Patras, Greece.

|January 11, 2024

概括

开发了具有强大的机械性能和高导电性的新的离子交换膜 (AEM),用于水电解. 基于piperidinium的AEM表现出优异的性能和性稳定性,与基于pyrrolidinium的AEM相比.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
聚合物化学聚合物化学

背景情况:

机械强大的离子交换膜 (AEM) 对于高效的水电解至关重要.
现有的AEM通常面临着在性环境中长期稳定性的挑战.

研究的目的:

合成和评估新型无烯的多芳香性AEMs,其中包含异素部分.
为了研究不同循环四级氨基离子组 (pyrrolidinium 和 piperidinium) 对 AEM 特性的影响.
评估这些AEM在性水电解中的性能.

主要方法:

超级酸催化共聚合,以创建无烯的多芳香物质.
功能化与循环四级 (QA) 阴离子组.
使用SAXS,AFM,TEM,1H NMR和电化学阻抗光谱 (EIS) 的表征.
在80°C的2MKOH中进行1个月的性稳定性测试.
在性水电解电池中的性能评估.

主要成果:

基于pyrrolidinium和piperidinium的AEM均表现出良好的电解质吸收和没有显著的相分离.
实现了高导电性值:在80°C时达到81.5mS cm−1 () 和120mS cm−1 ().
观察到出色的性稳定性,基于的AEM在老化后保留了87%的导电性.
基于piperidinium的AEM在性水电解中表现出优异的性能,这是由于导电性更高.

结论:

合成的AEM为水电解应用提供了一个有前途的平台.
基于piperidinium的AEM在性介质中表现出较高的性能和稳定性,而不是与pyrrolidinium类似物相比.
已确定降解机制,特别是霍夫曼消除,有助于在基于piperidinium的AEM中的导电性损失.

关键词:

在AEM系统中,性稳定性的性稳定性性水的电解是性水的电解.离子导电性的离子导电性.皮佩里迪尼是最重要的.聚二基基基基基基皮罗利迪尼乌姆 (pyrrolidinium) 是一种体.

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