Preparation and characterization of quaternized poly (2,2,2‐trifluoroethyl methacrylate‐co‐N‐vinylimidazole) membrane for vanadium redox flow battery |
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Authors: | Jun Fang Hankun Xu Xiaolan Wei Mingli Guo Xiaohuan Lu Chengli Lan Yanmei Zhang Yan Liu Tao Peng |
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Institution: | 1. Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, , Xiamen, 361005 China;2. School of Chemistry and Chemical Engineering, South China University of Technology, , Guangzhou, 510640 China |
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Abstract: | Aiming to develop a suitable ion exchange membrane for vanadium redox flow battery (VRB), a new kind of imidazolium salt type anion exchange membrane based on the copolymer of N‐vinylimidazole and 2,2,2‐trifluoroethyl methacrylate has been prepared. The membrane is characterized by means of water uptake, ion‐exchange capacity, ionic conductivity, and thermal stability. Furthermore, a VRB with this membrane is assembled, and the performance of such VRB is evaluated. The permeability experiments show that this membrane has reasonable low permeability of vanadium ions. The coulombic efficiency (CE) and energy efficiency (EE) of VRB with the synthesized membrane are 99.5% and 75.0%, whereas the CE and EE of the VRB with Nafion® 117 membrane are 82.6% and 72.6%, respectively. The synthesized membrane shows good chemical stability in VRB via more than 4000 cycles test. Therefore, this membrane shows good applicable potential in VRB. Copyright © 2012 John Wiley & Sons, Ltd. |
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Keywords: | anion exchange membrane vanadium redox flow battery N‐vinylimidazole 2 2 2‐trifluoroethyl methacrylate |
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