Aris, Fara M. and Pershaanaa, M. and Gunalan, Surender and Bashir, Shahid and Omar, Fatin Saiha and Saidi, Norshahirah M. and Ramesh, Kasi and Ramesh, Subramaniam (2023) Surface modification of metal phosphate Binder-Free electrode with metal hydroxides for supercapattery. Flatchem, 39. ISSN 2452-2627, DOI https://doi.org/10.1016/j.flatc.2023.100504.
Full text not available from this repository.Abstract
Supercapattery is one of the emerging alternative energy storage technologies and numerous recent studies have been done in search of good electrode material for its application. Cobalt phosphate (Co3(PO4)2) is a promising candidate due to its abundance, low cost, valence states variation, and good faradaic property. However, cobalt phosphates have limited surface area, affecting its electrochemical performance. To overcome that, herein Co3(PO4)2 was synthesized via sonochemical method and calcined at various temperatures to obtain the best calcination temperature followed by coating of cobalt hydroxide (Co(OH)2) layer. The synthesis of Co3(PO4)2 and coating of Co(OH)2 over cobalt phosphate was observed through X-ray diffraction analysis (XRD) and the morphology of the synthesized nanostructures was observed using Field emission scanning electron microscopy (FESEM). Cyclic voltammetry, galvanostatic charge discharge, and electrochemical impedance spectroscopy analyses were carried out. The results showed calcination temperature of 200 degrees C followed by coating of Co(OH)2 using 2 mM metal precursor as the optimized sample. This sample exhibited the fascinating electrochemical performance of specific capacitance (2111.83F g-1 at 1 A g-1), energy density (72.51 Wh kg- 1 at 1 A g-1), and power density (2357 W kg- 1 at 10 A g-1) and fabricated supercapattery demonstrated outstanding cyclic stability up to 84 % over 15,000 charge/discharge cycles.
| Item Type: | Article |
|---|---|
| Funders: | Technology Development Fund 1 (TeD1) from the Ministry of Science, Technology, and Innovation (MOSTI), Malaysia [FP076-2022], Fundamental Research Grant Scheme (FRGS); [MOSTI002-2021TED1] |
| Uncontrolled Keywords: | Cobalt phosphate; Cobalt hydroxide; Binder -free electrode; Supercapattery |
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Department of Physics Deputy Vice Chancellor (Research & Innovation) Office > UM Power Energy Dedicated Advanced Centre |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 11 Jun 2024 04:36 |
| Last Modified: | 11 Jun 2024 04:36 |
| URI: | http://eprints.um.edu.my/id/eprint/38279 |
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