Sehrish Nazir, Pramod K. Singh, Amrita Jain, Monika Michalska, M.Z.A. Yahya, S.N.F. Yusuf, Markus Diantoro, Famiza Abdul Latif, Manoj K. Singh
Poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP)-sodium thiocyanate (NaSCN) solid polymer electrolytes containing different weight ratios of ionic liquid (IL)—tributylmethylphosphonium iodide (TBMPI) were prepared using solution-cast approach. Electrochemical impedance data indicates that increasing ionic liquid into polymer electrolyte matrix increases ionic conductivity and the maximum value of ionic conductivity was obtained at 150 wt% TBMPI, having conductivity value of 8.3 × 10−5 S cm−1. The dielectric measurement supports our conductivity data. Ionic transference number measurement affirms this system to be predominantly ionic in nature, while electrochemical stability window (ESW) was found to be 3.4 V. Polarized optical microscopy (POM) along with differential scanning calorimetry (DSC) suggest suitability of TBMPI as plasticizer, while infrared spectroscopy (FTIR) confirms ion interaction, complexation, and composite nature. The thermogravimetric analysis (TGA) shows thermal stability of these ionic liquid-doped polymer electrolytes (ILDPEs). Using maximum conducting ILDPE, a sandwiched supercapacitor has been fabricated which shows stable performance as high as 228 Fg−1 using cyclic voltammetry (CV). © 2024 John Wiley & Sons Ltd.
Center for Solar-Cells and Renewable Energy (CSRE), Department of Physics, SSBSR, Sharda University, Greater Noida, India; Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland; Department of Chemistry and Physico-Chemical Processes, Faculty of Materials Science and Technology, VSB-Technical University of Ostrava, Ostrava, Czech Republic; Faculty of Defence Science and Technology, Universiti Pertahanan Nasional Malaysia (UPNM), Kuala Lumpur, Malaysia; Center for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia; Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Malang, Indonesia; Faculty of Applied Sciences, Universiti Teknologi MARA (Malaysia), Shah Alam, Malaysia; Energy Conversion & Storage Lab, Department of Applied Science and Humanities, Rajkiya Engineering College Banda, Uttar Pradesh, India
