Hollow cobalt carbide cubes / reduced graphene oxide nanocomposite via cyanide coordination polymer for supercapacitor applications
Coordination polymers, a broad class of porous hybrid materials resulting from the connection of metal ions with organic ligands, showcase enduring porosity, well-organised crystalline structures, and open metal active sites that augment their metal ions' redox activity. This investigation focu...
| Main Authors: | , , , , , |
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| Format: | Book Chapter |
| Language: | English |
| Published: |
Trans Tech Publications Ltd.
2024
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/44303/ http://umpir.ump.edu.my/id/eprint/44303/1/Hollow%20Cobalt%20Carbide%20Cubes%20Reduced%20Graphene%20Oxide%20Nanocomposite%20via%20Cyanide.pdf |
| Summary: | Coordination polymers, a broad class of porous hybrid materials resulting from the connection of metal ions with organic ligands, showcase enduring porosity, well-organised crystalline structures, and open metal active sites that augment their metal ions' redox activity. This investigation focuses on examining a nanocomposite composed of cobalt carbide/reduced graphene oxide (Co3C/rGO) prepared through the copolymer method, serving as an electrode material for supercapacitor devices. The nanocomposite's structure and hollow cubic morphology were confirmed through X-ray diffraction, Raman spectroscopy, and field emission scanning electron microscopy (FESEM) analysis. Electrochemical properties were thoroughly assessed using cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge/discharge in 6M KOH with a voltage window of 0 V to 0.5 V. The Co3C/rGO electrode exhibited notable electrochemical performance, displaying a specific capacitance of 486.6 F g-1 at 1 mV s-1 and a low internal resistance of 0.58 Ω, surpassing existing literature due to its porous morphology. Additionally, to evaluate the nanocomposite's cycling stability, 5000 charge/discharge cycles were conducted, revealing a capacitive retention of 82% of its original capacitance after 5000 cycles. This underscores its excellent long-term durability as a high-performance material for supercapacitor applications. |
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