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基于宏分子交联聚 ((arylene piperidinium) 的尺寸稳定的离子交换膜用于水电解

Xiuqin Wang^1,2, Angela Mary Thomas^1,3, Rob G H Lammertink¹

¹Soft Matter, Fluidics and Interfaces, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, 7522 NB Enschede, The Netherlands.

ACS applied materials & interfaces

|January 4, 2024

概括

新的交联离子交换膜 (AEM) 克服了胀和导电性权衡. 这些先进的AEM显示出高离子导电性和水电解应用的稳定性.

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
聚合物科学聚合物科学

背景情况:

阳离子交换膜 (AEM) 对于电化学设备,如水电解仪至关重要.
在AEM开发中的一个关键挑战是离子导电性和膜膨胀之间的权衡.
现有的AEM往往有不良的机械和性稳定性,这限制了它们的实际应用.

研究的目的:

开发新的宏分子交联AEM,克服导电性膨胀的权衡.
为了提高AEMs的离子导电性,机械强度和性稳定性.
评估开发的AEM在水电解中的性能.

主要方法:

通过将功能化以太无结合聚乙烯 (FPVBC) 与聚烯 (arylene piperidinium) 结合而制造交联的AEM (C-FPVBC-x).
使用原子力显微镜 (AFM) 分析形态的特征.
通过离子导电量测量,机械和性稳定性测试以及水电解仪测试来评估性能.
模拟分子动力学以研究离子导电机制.

主要成果:

在30°C时,C-FPVBC-1.7膜表现出高离子导电率,为40.15mS cm−1.
增加的FPVBC比率促进了微相分离,增强了离子导电性.
C-FPVBC-1.7膜表现出极好的机械和性稳定性,在50°C的1MKOH中,经过1200小时,导电能力仅下降6.9%,在50°C时仅下降6.9%.
一个基于AEM的水电解仪在2.4V (80°C) 时实现了890mA cm-2的电流密度,并显示出良好的运行稳定性.

结论:

大分子交叉链接有效地解决了AEM中膨胀和离子导电性之间的权衡.
开发的C-FPVBC-x AEM具有卓越的离子导电性,机械强度和性稳定性.
这些先进的AEM显示出在水电解中高效和持久运行的巨大潜力.

关键词:

有限制的胀.大分子交叉链接器微相分离的微相分离方法分子动力学模拟模拟水的电解是水的电解.

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