Rahim, A. H. A. and Majid, Siti Rohana (2023) Ni/Co-based zeolitic-imidazolate framework pseudocapacitance in asymmetrical cells. Journal of Applied Electrochemistry, 53 (9). pp. 1727-1737. ISSN 0021-891X, DOI https://doi.org/10.1007/s10800-023-01888-x.
Full text not available from this repository.Abstract
Facile synthesis of Ni/Co-based zeolitic-imidazolate frameworks (ZIFs) with interconnected rod-shape like particles was successfully achieved using a simple co-precipitation approach. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy, energy-dispersive X-ray and X-ray photoelectron spectroscopy were used to characterise the studied materials. The formation of the NiCo-ZIF bimetallic sample was confirmed by XRD and FTIR studies. The electrochemical behaviour of bimetallic electrode materials was assessed using cyclic voltammetry, constant-current charge/discharge cycling and electrochemical impedance measurements. The specific capacitance of the Ni/Co-ZIF reached 358 C g(-1) at a current density of 0.50 A g(-1) and cycling stability of 96.5% after 2500 cycles in a three-electrode system. The two-electrode setup for asymmetrical cell for Ni/Co-ZIF//KOH//AC obtained an energy density of 16 Wh kg(-1) and power output of 457 W kg(-1) with an excellent stability performance (capacity retention of 106% after 2500 cycles). Findings demonstrate that bimetallic Ni/Co-ZIF produced by a room-temperature one-step co-precipitation method could offer great potential for high-performance supercapacitors.
| Item Type: | Article |
|---|---|
| Funders: | Malaysian Ministry of Higher Education and University of Malaya [Grant No: FRGS/1/2018/STG07/UM/02/8 ; FG034-17AFR] |
| Uncontrolled Keywords: | Zeolitic-imidazolate frameworks (ZIFs); Bimetallic NiCo-ZIF; Co-precipitation; Electrolyte supercapacitors |
| Subjects: | Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 06 Nov 2025 03:10 |
| Last Modified: | 06 Nov 2025 03:10 |
| URI: | http://eprints.um.edu.my/id/eprint/49795 |
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