Synthesis and ionic conductivity of polymeric ion gel containing room temperature ionic liquid and phosphotungstic acid |
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| Institution: | 1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;2. Department of Chemistry, Tsinghua University, Beijing 100084, China;1. Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA;2. Sami Shamoon College of Engineering, Beer-Sheva 84100, Israel;1. College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;2. Collaborative Innovation Center for Ecological Building Materials and Environmental Protection Equipments, Yancheng Institute of Technology, Yancheng 224051, China;1. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China;2. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510006, China;1. State Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry, Jilin University, 130021 Changchun, China;2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China;1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China;2. School of Chemistry and Materials Science, Ludong University, Yantai 264025, People’s Republic of China |
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| Abstract: | Composite electrolyte comprising phosphotungstic acid (PWA) filler and 1-butyl-3-methyl-imidazolium-tetrafluoroborate (BMImBF4) room temperature ionic liquid (RTIL) in poly(2-hydroxyethyl methacrylate) (PHEMA) matrix has been prepared. The polymer matrix was formed by free radical polymerization of 2-hydroxyethyl methacrylate (HEMA) monomers. BMImBF4 was used as both ionic source and plasticizer, and PWA filler provided the proton conductivity in this system. The interactions and structure changes of the PHEMA-RTIL-PWA composites were investigated by Fourier transform infrared spectra, differential scanning calorimetry, and X-ray diffraction. PWA fillers maintained their Keggin structure within a limited range and enhanced the ionic conductivity of the composite electrolyte. The electrolyte with PWA at the 2 wt.% showed the highest ionic conductivity of 8 × 10− 4 S cm− 1 at room temperature and 96% relative humidity. |
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