Membranes which allow fast and selective transport of protons and cations are required for a wide range of electrochemical energy conversion and storage devices, such as proton‐exchange membrane (PEM) fuel cells (PEMFCs) and redox flow batteries (RFBs). Herein we report a new approach to designing solution‐processable ion‐selective polymer membranes with both intrinsic microporosity and ion‐conductive functionality. Polymers are synthesized with rigid and contorted backbones, which incorporate hydrophobic fluorinated and hydrophilic sulfonic acid functional groups, to produce membranes with negatively charged subnanometer‐sized confined ionic channels. The ready transport of protons and cations through these membranes, and the high selectivity towards nanometer‐sized redox‐active molecules, enable efficient and stable operation of an aqueous alkaline quinone redox flow battery and a hydrogen PEM fuel cell.

中文翻译：

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具有快速和选择性离子迁移功能的磺化微孔聚合物膜，用于电化学能量转换和存储。

广泛的电化学能量转换和存储设备（例如质子交换膜（PEM）燃料电池（PEMFC）和氧化还原液流电池（RFB））需要允许质子和阳离子快速且选择性地运输的膜。本文中，我们报告了一种设计具有固有微孔性和离子导电功能性的可溶液处理的离子选择性聚合物膜的新方法。合成的聚合物具有刚性和扭曲的主链，并结合了疏水性的氟化和亲水性磺酸官能团，从而生产出带负电荷的亚纳米级受限离子通道的膜。质子和阳离子易于通过这些膜传输，并且对纳米级的氧化还原活性分子具有很高的选择性，