Gum Arabic-based blend biopolymer electrolyte for electric double layer capacitor applications
M Hema1, Gokul Gopinath2, A Sakunthala2
1Department of Physics, Kamaraj College of Engineering and Technology, K. Vellakulam, Near Virudhunagar 625 701, Tamilnadu, India.
Abstract:
The present research focuses on PVA: Gum Arabic: Ammonium Nitrate biopolymer blend electrolyte prepared using ultrasound-assisted solvent casting method and its applicability in Electric Double-Layer capacitor. AC impedance spectroscopic technique reveals the highest ionic conductivity of 10-5 Scm-1 at 303 K for 20 mol% ammonium nitrate doped sample which is higher than pure PVA. The transference number obtained for the prepared samples (0.94-0.96) confirms the dominant proton contribution to the conductivity. The constructed EDLC with the highest ionic conductivity electrolyte and carbon electrodes show a highest specific capacitance of 2909 mF/g. Intriguingly, the specific capacitance Cs values remain stable over 500 cycles which confirms its cycling stability.
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