Preparation and characterization of a Polyacrylonitrile based gel polymer electrolyte for redox capacitors

Malshani Bandaranayake, Sandaranghe Weerasinghe, Kamal Vidanapathirana, Kumudu Perera


In this study, a gel polymer electrolyte (GPE) consisting with polyacrylonitrile (PAN), ethylene carbonate (EC), propylene carbonate (PC) and magnesium trifluromethane sulfonate (Mg(CF3SO3)2) was prepared using the hot pressed method. The starting materials were heated at 130 C for 2 hours and the resulting hot viscous mixture was pressed in between two well cleaned glass plates. The composition was fine-tuned by varying the salt and the polymer concentration in order to obtain a mechanically stable, thin and flexible film with a high ionic conductivity. It was found that the composition, 105 PAN : 150 MgTF : 400 EC : 400 PC gives the maximum conductivity of 1.06 x 10-2 Scm-1. DC polarization test done with blocking electrodes confirmed the ionic nature of the sample while the results obtained with non-blocking electrodes proved that the anionic contribution for the conductivity is dominant. The sample was used in redox capacitors having two identical polypyrrole electrodes doped with dodecylbenzesulfonate. Cyclic Voltammetry, Galvanostatic Charge Discharge and Electrochemical Impedance Spectroscopy techniques were used to evaluate the performance of the redox capacitors. The specific capacitance was high at low scan rates. The electrolyte was quite stable when use in the redox capacitors. Further, redox capacitor was having a good cycleability which is one of the important key issues to be considered for practical applications.

Keywords. Gel polymer electrolyte, Redox capacitor, Polyacrylonitrile, Polypyrrole, EIS.

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Bandaranayake CM, Weerasinghe WADSS, Vidanapathirana KP, Perera KS 2015. A cyclic voltammetry study of a gel polymer electrolyte based redox-capacitor. Sri Lankan Journal of Physics. 16, 19-27

Hashmi S 2004. Super capacitor: an emerging power source. National Academic Sci. Lett. 27, 27-46

Hashmi SA, Kumar A. Tripathi SK 2005. Investigations on electrochemical supercapacitors using polypyrrole redox electrodes and PMMA based gel electrolytes. European Polymer Journal. 41, 1373-1379

Ingram MD, Staesche H, Ryder KS 2004. Ladder doped polypyrrole: a possible electrode material for inclusion in electrochemical super capacitors. Journal of Power Sources. 129, 107-112

Jayathilake YMCD, Perera KS, Vidanapathirana KP, Bandara LRAK 2014. A novel gel polymer electrolyte based on polymethylmethacrylate and copper trifluromethanesulfonate. Journal of Electroanalytical Chemistry. 724, 125-129

Jayathilake YMCD, Perera KS, Vidanapathirana KP 2015. Preparation and characterization of a polyacrylonitrile-based gel polymer electrolyte complexed with 1 methyl-3 propyl immidazolium iodide. Journal of Solid State Electrochemistry. 19 (8), 2199-2203

Kumar D, Hashmi SA 2010. Ionic liquid based sodium ion conducting gel polymer electrolytes. Solid State Ionics. 181, 416-423

Liu Z, Abedin SZE, Endres F 2014. Electrodeposition and stripping of Zinc from an ionic liquid polymer gel electrolyte for rechargeable zinc based batteries. Journal of Solid State Electrochemistry. 18, 2581-2587

Pandey GP, Rastogi AC, Westgate CR 2013. Polyacrylonitrile and 1ethyl 3 methyl imidazolium thiocyanate based gel polymer electrolyte for solid state supercapacitors with grapheme electrodes. ECS Transactions. 50(43) 145-151

Perera K, Vidanapathirana KP, Dissanayake MAKL 2007. Artificial muscles based on Polyacrylonitrile based electrolytes. Sri Lankan Journal of Physics. 8, 39-45

Perera K, Vidanapathirana KP, Dissanayake MAKL 2011. Effect of the polymer host, Polyacrylonitrile on the performance of Li rechargeable cells. Sri Lankan Journal of Physics. 12, 25-31

Prabhaharan SRS, Vimala R, Zainal Z 2006. Nano structured mesoporous carbon as electrodes for super capacitor. Journal of Power Sources. 161, 730-736

Ramesh S, Lu SC, Morris E 2012. Towards magnesium ion conducting poly(vinylidenefluoride-hexafluoropropylene) based solid polymer electrolytes with great prospects : ionic and dielectric behaviour. Journal of Taiwan Institute of Chemical Engineers 43, 806-812

Ravindran D, Vickraman P 2012. Magnesium ionic conductivity behaviour of mixed salt system in PVA-PEG blend matrix. International Journal of Science and Research Publications. 2112, 1-4

Sharma JP, Sekhon SS 2006. PMMA based polymer gel electrolytes containing NH4PF6: Role of molecular weight of polymer. Materials Science and Engineering B. 129, 104-108

Sun A, Xu Y, Wang J 2012. Electropolymerized composite film of polypyrrole and functionalized multi walled carbon naotubes: effect of functionalization time on capacitve performance. Journal Solid State Electrochemistry. 16, 1781-1789

Uppugalla S, Male U, Srinivasan P 2014. Design and synthesis of heteroatoms doped carbon / polyaniline hybrid material for high performance electrode in super capacitor application. Electrochimica Acta. 146, 242-248

Wang W, Guo S, Penchev M, Ruiz I, Bozhilov KN, Yan D, Ozkan M, Ozkan CS 2013. 3d few layer grapheme and carbon nano tube foam architectures for high fidelity super capacitors. Nano Energy, 2, 294-303

Wang Y, Yang Y, Zhang X, Liu C, Hao X 2015. One step electrodeposition of polyaniline / nicle hexacynoferrate sulfonated carbon nano tubes interconnected composite films for super capacitors, Journal of Solid State Electrochemistry, 19, 3157-3168

Wu TY, Li WB, Kuo CW, Chou CF, Liao JW, Chen HR, Tseng CG 2013. Study of PMMA based gel electrolyte for EC devices. International Journal of Electrochem Science, 8, 10720-10732


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