Study of EVOH based single ion polymer electrolyte: Composition and microstructure effects on the proton conductivity |
| |
| Institution: | 1. Department of Applied Chemistry, Harbin Institute of Technology, P.O. Box 410, Xidazhi Street 92, Nangang District, Harbin 150001, China;2. School of Materials Science and Engineering, Harbin University of Science and Technology, P.O. Box. 3491, Linyuan Road 4, Dongli District, Harbin 150040, China;1. State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (MOE), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, PR China;2. Department of Clinical Laboratory, Zhongnan Hospital, Wuhan University, Wuhan, 430071, PR China;1. Department of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden;2. ALISTORE—European Research Institute, 33 rue Saint Leu, 80039 Amiens, France;1. School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea;2. Research Institute for Solar and Sustainable Energy (RISE), Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea;1. Key Laboratory of Power Station Energy Transfer Conversion and System, Ministry of Education, North China Electric Power University, Beijing 102206, China;2. Engineering Research Centre of Oil Shale Comprehensive Utilization, Ministry of Education, Northeast Electric Power University, Jilin City, Jilin 132012, China;3. ICSET Solutions, Bowling Green, KY 42104, USA |
| |
| Abstract: | A comb-like EVOH based single ion polymer electrolyte (EVOH-g-SPEG) was synthesized by sulfonification of EVOH grafts 2-(2-chloroethoxy) ethanol (C4H9O2Cl)/2-2-(2-chloroethxy) ethoxy] ethanol (C6H13O3Cl) with 1, 3-propane sultone. The main chain of the comb-like polymer is hydrophobic polyethylene segments; the side chain is hydrophilic poly (ethylene glycol) (PEG) segment, which can solubilize large amounts of inorganic salts. The sulfonic acid group was introduced onto the end of the PEG side chain. The acid form of SPE was successfully obtained by being dialyzed from the products with acid solution. The saturation water sorption of EVOH-g-SPEG membrane increased with the side chain length and the immersion time. The XRD results indicate that the water in SPE membrane region can destroy the membrane crystalline structure and the water absorption membranes are nearly amorphous. AFM phase images of the hydration membranes clearly show the hydrophilic domains, with sizes increasing from 10 to 35 nm as a function of the side chain length. A phase inversion could be observed when n ≥ 5, which was consistent with a rapid increase in water absorption. And the ion conductivity is also measured by AC impedance. The conductivity is greatly influenced by ion exchange capacity and water sorption. The comb-like EVOH-g-SPEG polymer electrolyte grafts with 2 PEG side chain provides the highest ionic conductivity (1.65 × 10? 3 S cm? 1). The comb-like polymer could be a candidate as new polymeric electrolyte material for fuel cells and other electrochemical devices. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
