1-Ethyl-3-methylimidazolium trifluoromethanesulfonate-based gel polymer electrolyte for application in electrochemical double-layer capacitors
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Electrochemical double-layer capacitors (EDLCs) have received an enormous attraction for energy storage applications due to their unique features to meet the high demand of energy in the world. At present, there is a substantial interest on cheap and safe energy storage devices, and hence, the present investigation was carried out to fabricate an EDLC using natural graphite electrodes and an ionic liquid (IL)-based gel polymer electrolyte (GPE). Electrolyte was prepared using the IL 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (1E3MITF) with the polymer poly(vinylidenefluoride)-co-hexafluoropropylene and the salt zinc trifluoromethanesulfonate (ZnTF). The electrochemical properties of the EDLC were evaluated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and galvanostatic charge-discharge (GCD) test. It was found from the CV test that the EDLC exhibits a single-electrode specific capacitance of 7.95 Fg−1. With the GCD results, a discharge capacitance of 1.01 Fg−1 was obtained. In addition, a good cyclic stability was observed. The EDLC with this novel IL-based GPE can be used for the energy applications with further enhancements.
KeywordsIonic liquid Natural graphite Electrochemical double-layer capacitor Poly(vinylidenefluoride)-co-hexafluoropropylene Gel polymer electrolyte
This work was supported by the National Science Foundation Sri Lanka under the research grant RG/2017/BS/02 and the equipment grant RG/2015/EQ/07.
- 17.Karmakar A, Ghosh A (2011) Charge carrier dynamics and relaxation in (polyethylene oxide – lithium salt) based polymer electrolyte containing 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide as ionic liquid. Phys Rev 84:0518021–0518029Google Scholar
- 27.Pandey GP, Kumar Y, Hashmi SA (2010) Ionic liquid incorporated polymer electrolytes for supercapacitor applications. Indian J Chem 49A:743–751Google Scholar
- 30.Arslan A, Hur E (2012) Supercapacitor applications of polyaniline and poly(N-methylaniline) coated pencil graphite electrode. Int J Electrochem Sci 7:12558–12572Google Scholar
- 32.Harankawa N, Weerasinghe WADSS, Vidanapathirana KP, Perera KS (2017) Investigation of a pseudo capacitor with polyacrylonitrile based gel polymer electrolyte. J Electrochem Sci Technol 8(2):107–114Google Scholar