Synthesizing spindle-shaped anion exchange membranes to improve conductivity and stability |
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| Affiliation: | 1. College of Chemical Engineering, Changchun University of Technology, PR China;2. School of Materials Science and Engineering, Changchun University of Technology, PR China;3. Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, PR China;1. College of Chemical Engineering, Huaqiao University, Xiamen, 361021, PR China;2. NTNU Nanomechanical Lab, Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, 7491, Norway;3. College of Materials Science and Engineering, Fujian University of Technology, Fuzhou, 350118, PR China;1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), China |
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| Abstract: | High ionic conductivity and excellent alkaline stability are very important for solid electrolyte. Therefore, spindle-shaped anion exchange membranes (AEMs) based on poly (arylene ether ketone) and 1-Bromo-N,N,N-trimethylhexane-6-aminium bromide (Br-QA) have been prepared. The obtained Br-QA can be grafted with poly (arylene ether ketone) main chains to form micro-phase separation structure enhancing the ionic conductivity. Especially, the grafting quaternary ammonium (QA) cation groups are separated by alkyl bromine endows the AEMs with alkaline stability features. Simultaneously, the OH− conductivity of the QA-PAEK-0.6 obtained membranes is 0.046 S/cm under fully hydrated conditions at 60 °C. After immersing into 1 M NaOH alkaline solution for 15 days at 60 °C, the anionic conductivity still high to 0.03 S/cm. Meanwhile, the poly (arylene ether ketone) backbones provide excellent mechanical properties and the Br-QA cation groups also possess good thermal stability, which satisfy the requirement of wide applications. |
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| Keywords: | Alkaline stability High ionic conductivity Micro-phase separation structure Spindle-shaped |
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