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Performance of A Sodium Thiocyanate Based Gel Polymer Electrolyte In Redox Capacitors

Authors:

C.M. Bandaranayake,

Polymer Electronics Research Laboratory, Department of Electronics, Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya., LK
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Y.M.C.D. Jayathilake,

Polymer Electronics Research Laboratory, Department of Electronics, Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya., LK
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K.P. Vidanapathirana ,

Polymer Electronics Research Laboratory, Department of Electronics, Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya., LK
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K.S. Perera

Polymer Electronics Research Laboratory, Department of Electronics, Faculty of Applied Sciences, Wayamba University of Sri Lanka, Kuliyapitiya., LK
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Abstract

Solid state redox capacitors have received a tremendous interest in terms of several characteristics such as their fast energy delivery, short charging time, high power density and extended durability. Due to the absence of a liquid electrolyte, they are free from drawbacks of leakage and unsafe. In this study, preparation and characterization of a redox capacitor consisting with two identical polypyrrole (PPy): dodecylbenzenesulfonate (DBS) electrodes and a gel polymer electrolyte (GPE) based on polyvinylidene fluoride (PVdF), ethylene carbonate (EC), propylene carbonate (PC) and sodium thiocyanate (NaSCN) is reported. The GPE having the composition, 0.4 PVdF: 1 EC: 1 PC: 0.075 NaSCN (by weight) showed the maximum conductivity of 2.25× 10-3 S cm-1. Redox capacitors were characterized using Cyclic Voltammetry, Electrochemical Impedance Spectroscopy and Galvanostatic Charge Discharge test. They exhibited an energy density about 0.25 W h kg-1 and an average power density of 4 kW kg-1.
DOI: http://doi.org/10.4038/suslj.v14i2.7702
How to Cite: Bandaranayake, C.M. et al., (2015). Performance of A Sodium Thiocyanate Based Gel Polymer Electrolyte In Redox Capacitors. Sabaragamuwa University Journal. 14(2), pp.149–161. DOI: http://doi.org/10.4038/suslj.v14i2.7702
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Published on 01 Dec 2015.
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