Electrical, electrochemical and structural studies of a chlorine-derived ionic liquid-based polymer gel electrolyte

• Published in: Beilstein journal of nanotechnology 2021-11, Vol.12 (1), p.1252-1261
• Main Authors: Gupta, Ashish, Jain, Amrita, Kumari, Manju, Tripathi, Santosh K
• Format: Article
• Language: English
• Subjects: Chlorine; Dimensional stability; Electrochemical potential; Electrolytes; Energy storage; Full Research Paper; Ion currents; ionic liquid; Ionic liquids; Ions; Morphology; Nanoscience; Nanotechnology; Polymer films; polymer gel electrolytes; Polymer gels; Polymers; Polyvinyl alcohol; Room temperature; Scanning electron microscopy; solution casting technique; Temperature dependence; transference number; Vinylidene; Vinylidene fluoride
• ISSN: 2190-4286; 2190-4286
• DOI: 10.3762/bjnano.12.92

In the present article, an ionic liquid-based polymer gel electrolyte was synthesized by using poly(vinylidene fluoride- co -hexafluoropropylene) (PVdF-HFP) as a host polymer. The electrolyte films were synthesized by using the solution casting technique. The as-prepared films were free-standing and transparent with good dimensional stability. Optimized electrolyte films exhibit a maximum room-temperature ionic conductivity of σ = 8.9 × 10 −3 S·cm −1 . The temperature dependence of the prepared polymer gel electrolytes follows the thermally activated behavior of the Vogel–Tammann–Fulcher equation. The total ionic transference number was ≈0.91 with a wider electrochemical potential window of 4.0 V for the prepared electrolyte film which contains 30 wt % of the ionic liquid. The optimized films have good potential to be used as electrolyte materials for energy storage applications.