Highly Conductive Anion‐Exchange Membranes from Microporous Tröger's Base Polymers |
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| Authors: | Zhengjin Yang Rui Guo Richard Malpass‐Evans Mariolino Carta Neil B McKeown Michael D Guiver Liang Wu Tongwen Xu |
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| Institution: | 1. CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, School of Chemistry and Material Science, University of Science and Technology of China, Hefei, P.R. China;2. EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK;3. State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, P.R. China |
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| Abstract: | The development of polymeric anion‐exchange membranes (AEMs) combining high ion conductivity and long‐term stability is a major challenge for materials chemistry. AEMs with regularly distributed fixed cationic groups, based on the formation of microporous polymers containing the V‐shape rigid Tröger's base units, are reported for the first time. Despite their simple preparation, which involves only two synthetic steps using commercially available precursors, the polymers provide AEMs with exceptional hydroxide conductivity at relatively low ion‐exchange capacity, as well as a high swelling resistance and chemical stability. An unprecedented hydroxide conductivity of 164.4 mS cm?1 is obtained at a relatively a low ion‐exchange capacity of 0.82 mmol g?1 under optimal operating conditions. The exceptional anion conductivity appears related to the intrinsic microporosity of the charged polymer matrix, which facilitates rapid anion transport. |
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| Keywords: | anion-exchange membranes electrochemical membrane processes hydroxide conductivity PIMs Trö ger's bases |
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