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.
International Journal of Biological Macromolecules
|March 13, 2025
Summary
This study developed a novel biopolymer electrolyte for electric double-layer capacitors (EDLCs). The optimized blend achieved high ionic conductivity and excellent cycling stability, demonstrating its potential for energy storage applications.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Science
Background:
- Biopolymer electrolytes offer a sustainable alternative to liquid electrolytes in energy storage devices.
- Polyvinyl alcohol (PVA) and Gum Arabic are biocompatible polymers with potential for electrolyte applications.
- Ammonium nitrate doping can enhance the ionic conductivity of polymer electrolytes.
Purpose of the Study:
- To prepare and characterize a novel PVA: Gum Arabic: Ammonium Nitrate biopolymer blend electrolyte.
- To investigate the electrochemical properties of the developed electrolyte for its application in Electric Double-Layer Capacitors (EDLCs).
- To evaluate the performance and stability of EDLCs utilizing the novel biopolymer electrolyte.
Main Methods:
- Ultrasound-assisted solvent casting method for biopolymer blend electrolyte preparation.
- AC impedance spectroscopy to determine ionic conductivity and transference number.
- Fabrication and electrochemical testing of Electric Double-Layer Capacitors (EDLCs) with carbon electrodes.
Main Results:
- The PVA: Gum Arabic: Ammonium Nitrate biopolymer blend electrolyte exhibited a maximum ionic conductivity of 10^-5 S cm^-1 at 303 K for a 20 mol% ammonium nitrate doping concentration.
- Proton conduction was confirmed as the dominant charge transport mechanism with transference numbers ranging from 0.94 to 0.96.
- The fabricated EDLC demonstrated a high specific capacitance of 2909 mF/g.
- The EDLC device showed remarkable cycling stability, maintaining capacitance over 500 cycles.
Conclusions:
- The developed PVA: Gum Arabic: Ammonium Nitrate biopolymer blend electrolyte is a promising material for high-performance Electric Double-Layer Capacitors.
- The electrolyte's high ionic conductivity and excellent cycling stability contribute to efficient and durable energy storage.
- This research highlights the potential of biopolymer-based electrolytes in advancing sustainable energy storage technologies.
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