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新型侧链功能化聚钢/O-PBI混合物具有高性稳定性,用于离子交换膜水电解 (AEMWE)

Linus Hager^1,2, Manuel Hegelheimer^1,2, Julian Stonawski^1,2

¹Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11) Cauerstr. 1 91058 Erlangen Germany l.hager@fz-juelich.de.

Journal of materials chemistry. A

|November 28, 2023

概括

新的离子交换膜将一种新型聚合物与O-PBI混合在一起,以提高性条件下的稳定性和性能. 这些膜具有出色的导电性和耐久性,对于电化学应用至关重要.

科学领域:

聚合物化学聚合物化学
材料科学材料科学材料科学
电化学电化学电化学

背景情况:

阳离子交换膜 (AEM) 对电化学设备至关重要.
开发稳定和导电性AEM仍然是一个重大挑战.
聚胺醇 (PBI) 提供良好的热和机械稳定性,但需要功能化用于离子运输.

研究的目的:

为了合成一种基于聚乙烯的新离子交换聚合物.
使用聚胺醇 (O-PBI) 制造机械稳定的混合膜.
评估这些新AEM的性能和稳定性.

主要方法:

通过C-C合,四级化和自由基聚合,合成基于聚乙烯的离子交换聚合物.
在不同的比例下将新型聚合物与O-PBI混合,以形成膜.
膜性质的表征,包括吸水,离子导电性和性稳定性.
在离子交换膜水电解 (AEMWE) 电池中测试膜性能.

主要成果:

成功合成了一种新型的离子交换聚合物,在C6间隔器上具有阴离子电荷.
准备的机械稳定的混合膜具有可调节的离子交换能力 (IECs) 从1.58到2.20 meq. 在OH-g-1.
通过优化的混合物实现了优异的AEMWE性能 (2.0 A cm-2在70°C的1M KOH中在<1.8V下)
证明高性稳定性,在85°C的1MKOH中6周后没有导电性损失.

结论:

新型聚乙烯基离子交换聚合物,当与O-PBI混合时,形成了一个有前途的新型AEMs类.
混合膜表现出离子导电性,机械稳定性和特殊的性耐用性的良好平衡.
这些发现凸显了这些AEM在要求高的电化学应用中的潜力,特别是在性环境中.

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