Evaluation of water states in thin proton exchange membrane manufacturing using terahertz time-domain spectroscopy
Evaluation of water states in thin proton exchange membrane manufacturing using terahertz time-domain spectroscopy
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DOI：
10.1016/j.memsci.2022.120329
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发表时间：
2022-02-09
影响因子：
9.5
通讯作者：
Lin, H.
中科院分区：
文献类型：
--
作者：
Alves-Lima, D. F.;Li, X.;Lin, H.
全氟磺酸离聚物是最常见的质子交换膜材料，其结构支持其独特的水和化学/机械稳定性。因此，了解这种性能-稳定性权衡对于实现最佳膜至关重要。太赫兹时域光谱已被证明可以解析分子水状态和厚Nafion膜内的保留特性。通过开发一个基于参数的算法进行数据分析，我们证明了这种技术的广泛适用性，工业相关的薄离聚物（13-70 μ m）在各种加工条件下制备的结果支持传统的重量分析和先前的演示。因此，使用这种技术为膜优化的快速未来参数空间调查开辟了机会。
Perfluorinated sulfonic-acid ionomers are the most common proton exchange membrane material whose structure underpins their unique water and chemical/mechanical stability properties. Understanding this performance-stability trade-offs is therefore vital for realising optimal membranes. Terahertz time-domain spectroscopy has been demonstrated to resolve molecular water states and retention properties inside thick Nafion membranes. By developing a parametric-based algorithm for data analysis, we demonstrate the broad applicability of this technique to industrially relevant thin ionomers (13-70 mu m) prepared under various processing conditions where results are supported by conventional gravimetric analysis and prior demonstrations. Using this technique therefore opens up opportunities for rapid future parameter space investigation for membrane optimisation.