Molecular Structure Effects on Ionic Diode Performance in Desalination: Ultrahigh Rectification in Butylated Intrinsically Microporous Polyamine (PIM-EA-TB)
Molecular Structure Effects on Ionic Diode Performance in Desalination: Ultrahigh Rectification in Butylated Intrinsically Microporous Polyamine (PIM-EA-TB)
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DOI：
10.1002/celc.202300807
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发表时间：
2024-03-07
期刊：
影响因子：
4
通讯作者：
Marken，Frank
中科院分区：
文献类型：
--
作者：
Li，Zhongkai;Carta，Mariolino;Marken，Frank
离子二极管是用于交流电驱动的脱盐和离子提取过程的离子电路中的组件。与离子二极管类型/机制无关，在高离子强度下实现离子电流整流是具有挑战性的，但例如在海水淡化和盐水处理中是重要的。在这里，丁基化的分子刚性（玻璃态）聚合物的固有微孔性（PIM-EA-TB）显示，即使在高离子强度的水溶液2 M NaCl溶液中，得到阴离子二极管的整流效应（与界面电阻率）。 该效应基于影响离子传输的聚合物结构而合理化。
Ionic diodes are components in ionic circuits for AC‐electricity driven desalination and ion extraction processes. Independent of the ionic diode type/mechanism, achieving ionic current rectification at high ionic strengths is challenging but important, for example in seawater desalination and treatment of brine. Here, the butylation of a molecularly rigid (glassy) polymer of intrinsic microporosity (PIM‐EA‐TB) is shown to give anionic diodes with ultrahigh rectification effects (associated with interfacial resistivity) even in high ionic strength aqueous 2 M NaCl solution. The effect is rationalised based on polymer structure affecting ion transport.