Hamsan, Muhamad Hafiz and Halim, Norhana Abdul and Demon, Siti Zulaikha Ngah and Sa'aya, Nurul Syahirah Nasuha and Kadir, Mohd Fakhrul Zamani and Abidin, Zul Hazrin Zainal and Poad, Nursaadah Ahmad and Kasim, Nurul Farhana Abu and Razali, Nur Amira Mamat and Aziz, Shujahadeen B. and Ahmad, Khairol Amali and Miskon, Azizi and Nor, Norazman Mohamad (2022) SCOBY-based bacterial cellulose as free standing electrodes for safer, greener and cleaner energy storage technology. HELIYON, 8 (10). ISSN 2405-8440, DOI https://doi.org/10.1016/j.heliyon.2022.e11048.
Full text not available from this repository.Abstract
Bacterial Cellulose (BC) derived from local market or symbiotic culture of bacteria and yeast (SCOBY) was employed as the polymer matrix for hydroxyl multi-walled carbon nanotube (MWCNT-OH)-based electrochemical double-layer capacitor (EDLC). Chitosan (CS)-sodium iodide (NaI)-glycerol (Gly) electrolyte systems were used as the polymer electrolyte. CS-NaI-Gly electrolyte possesses conductivity, potential stability and ionic transference number of (1.20 +/- 0.26) x 10-3 S cm-2, 2.5 V and 0.99, respectively. For the electrodes, MWCNT-OH was observed to be well dispersed in the matrix of BC which was obtained via FESEM analysis. The inclusion of MWCNT-OH reduced the crystallinity of the BC polymeric structure. From EIS measurement, it was verified that the presence of MWCNT-OH decreased the electron transfer resistance of BC-based electrodes. Cyclic voltammetry (CV) showed that the shape of the CV plots changed to a rectangular-like shape plot as more MWCNT were added, thus verifying the capacitive behavior. Various amount of MWCNT-OH was used in the fabrication of the EDLC where it was discovered that more MWCNT-OH leads to a better EDLC performance. The EDLC was tested for 5000 complete charge-discharge cycles. The optimum performance of this low voltage EDLC was obtained with 0.1 g MWCNT where the average specific capacitance was 8.80 F g-1. The maximum power and energy density of the fabricated EDLC were 300 W kg-1 and 1.6 W h kg-1, respectively.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Pertahanan Nasional Malaysia (UPNM) [PPPI-A0014], Bahagian Penyelidikan dan Inovasi (BPI) |
| Uncontrolled Keywords: | Bacterial cellulose; EDLC; Supercapacitor; Energy storage; Renewable energy |
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms Koh Ai Peng |
| Date Deposited: | 25 Jul 2024 07:21 |
| Last Modified: | 25 Jul 2024 07:21 |
| URI: | http://eprints.um.edu.my/id/eprint/46231 |
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