KURINJI NATHAN, P (2025) High-Performance Porous Carbon Electrodes from Tea Residues: A Sustainable Approach for Advanced Supercapacitors. High-Performance Porous Carbon Electrodes from Tea Residues: A Sustainable Approach for Advanced Supercapacitors, 37 (6). pp. 1385-1391. ISSN 0970-7077
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Abstract
Carbon electrodes sourced through biomass for application in supercapacitors are currently a significant focus in the development of
energy storage devices that prioritize efficiency, environmental sustainability and cost-effectiveness. This investigation highlights a potential
avenue for tea residues, concentrating on the conversion of waste to useful resources. Tea residues served as a raw material to produce
activated carbon via a simple single-step process, aimed at creating highly efficient electrode material for supercapacitors. The samples
were subjected to chemical activation using ZnCl2 at two different temperatures (800 and 900 ºC). Surface area of the two TRAC samples
were analyzed using BET technique and noted as 940.14 m2/g and 1158.06 m2/g. The electrochemical investigation was specifically
carried out in both aqueous (6 M KOH) and non-aqueous (TEABF4) environments. The TRAC 900 electrode exhibited an impressive
specific capacitance of 395.42 F g–1 at 1 A g–1 and displayed exceptional cycling stability, maintaining 96.66% of its capacitance after
16,000 cycles in a non-aqueous environment. Furthermore, the peak power density attained was around 63,000 W kg–1 at an energy
density of 35 Wh g–1 when subjected to a higher current density of 10 A g–1. The impressive electrochemical performance suggests that the
highly ordered porous carbon electrodes derived from used-tea solid waste represent a promising option for high-performance supercapacitors
and exemplify the idea of converting waste into valuable resources.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Tea residue, Activated carbon, Supercapacitors, Carbon electrodes. |
| Divisions: | PSG College of Arts and Science > Department of Physics |
| Depositing User: | Dr. B Sivakumar |
| Date Deposited: | 03 Nov 2025 08:37 |
| Last Modified: | 03 Nov 2025 08:37 |
| URI: | https://ir.psgcas.ac.in/id/eprint/2507 |
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