Version 1
: Received: 10 October 2024 / Approved: 11 October 2024 / Online: 11 October 2024 (16:57:07 CEST)
How to cite:
Mukhiemer, S.; Daraghmeh, A.; Nassar, H.; Hussain, S.; Lim, H.; Han, H.; Kim, T. W.; Hilal, H. S. Physically and Chemically Activated Carbon from Coffee Waste in High Performance Supercapacitor Electrodes. Preprints2024, 2024100924. https://doi.org/10.20944/preprints202410.0924.v1
Mukhiemer, S.; Daraghmeh, A.; Nassar, H.; Hussain, S.; Lim, H.; Han, H.; Kim, T. W.; Hilal, H. S. Physically and Chemically Activated Carbon from Coffee Waste in High Performance Supercapacitor Electrodes. Preprints 2024, 2024100924. https://doi.org/10.20944/preprints202410.0924.v1
Mukhiemer, S.; Daraghmeh, A.; Nassar, H.; Hussain, S.; Lim, H.; Han, H.; Kim, T. W.; Hilal, H. S. Physically and Chemically Activated Carbon from Coffee Waste in High Performance Supercapacitor Electrodes. Preprints2024, 2024100924. https://doi.org/10.20944/preprints202410.0924.v1
APA Style
Mukhiemer, S., Daraghmeh, A., Nassar, H., Hussain, S., Lim, H., Han, H., Kim, T. W., & Hilal, H. S. (2024). Physically and Chemically Activated Carbon from Coffee Waste in High Performance Supercapacitor Electrodes. Preprints. https://doi.org/10.20944/preprints202410.0924.v1
Chicago/Turabian Style
Mukhiemer, S., Tae Woo Kim and Hikmat Said Hilal. 2024 "Physically and Chemically Activated Carbon from Coffee Waste in High Performance Supercapacitor Electrodes" Preprints. https://doi.org/10.20944/preprints202410.0924.v1
Abstract
Biowaste sources, like coffee wastes (CWs), are considered for advanced materials. CW was assessed to prepare activated carbon for supercapacitor electrodes, but showed low performance compared to other counterparts. Enhanced CW activation process may help address this limitation. In this study, CW was subjected to two activation methods: physical (pyrolysis) activation and physical-chemical activation using ZnCl2, to determine the more effective approach. Both resulting materials were analyzed using SEM, TEM, BET, Raman spectroscopy and XRD. The physical-chemical activation yielded activated carbon with better characteristics, including a higher specific-surface area (SSA) of ~830 m²/g, compared to 458 m²/g from the physical activation. With its promising potential for supercapacitor electrodes, the former activated carbon was singled out for supercapacitor study. Cyclic voltammetry revealed a specific capacitance of 261 F g-1, and energy density of 18.3 Wh/kg, with power density of 360 W/kg at a current density 0.33 A/g. Charge-discharge studies showed a specific capacitance of 150 F g-1 at the same current density. Electrochemical impedance spectroscopy indicated a specific capacitance of 180 F g-1, with an equivalent series resistance of 0.56 Ω at a low frequency of 0.01 Hz. The electrode exhibited exceptional characteristics, maintaining high stability over 5,000 charge-discharge cycles.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
