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Sustainable supercapacitor with a natural rubber-based electrolyte and natural graphite-based electrodes

Perera, Kumudu; Vidanapathirana, Kamal; Adams, Lewis J; Balakrishnan, Nilanthy

Authors

Kumudu Perera

Kamal Vidanapathirana

Lewis J Adams



Abstract

Supercapacitors are at the forefront of energy storage devices due to their ability to fulfill quick power requirements. However, safety and cost are important parameters for their real-world applications. Green materials-based electrodes and electrolytes can make them safer and cost-effective. Herein, a supercapacitor based on a methyl-grafted natural rubber/salt-based electrolyte and natural graphite (NG)-based electrodes are fabricated and characterized. Zinc trifluoromethanesulfonate [Zn(CF3SO3)2] is used as the salt for the electrolyte. A mixture of NG, activated charcoal, and polyvinylidenefluoride is used for electrodes. Our supercapacitor shows a single electrode specific capacitance, Csc of 4.2 Fg−1 from impedance measurement. Moreover, the capacitive and resistive features are dominant at low and high frequencies, respectively. The cyclic voltammetry test shows the dependence of Csc on the scan rate with a high value at slow scan rates. Performance of the supercapacitor during 5000 charge and discharge cycles at a constant current of 90 μA shows a rapid decrease of single electrode specific discharge capacitance at the beginning, but it starts to stabilize after about 2500 cycles. These findings are relevant to further developments of green materials-based supercapacitors, offering opportunities to expand the functionalities of supercapacitors in green technologies.

Journal Article Type Article
Acceptance Date Dec 19, 2023
Online Publication Date Dec 26, 2023
Publication Date Dec 26, 2023
Deposit Date Dec 26, 2023
Publicly Available Date Jan 3, 2024
Journal Electrochemical Science Advances
Electronic ISSN 2698-5977
Publisher Wiley
Peer Reviewed Peer Reviewed
Article Number e2300025
DOI https://doi.org/10.1002/elsa.202300025
Keywords zinc trifluoromethanesulfonate, natural rubber, supercapacitors, natural graphite
Publisher URL https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/elsa.202300025
Additional Information Experimental data lists for paper Sustainable Supercapacitor with a Natural Rubber-based Electrolyte and a Natural Graphite-based Electrodes available: https://doi.org/10.21252/7axf-as98

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