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Lookup NU author(s): Dr Stevin PramanaORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Supercapacitor market is mainly dominated by carbon, oxygen or sulfur based electrodematerials. They lack due to the low potential window, low operating current, and lowcapacitance retention over large charge discharge cycles. Transition metal-baseddichalcogenide systems (MX2) are found promising to resolve this research gap. But electrodematerials having two different chalcogenide anions (X, X’) are to be explored for this purpose.The interfacial interaction between sulfur and selenium in Ni(S,Se)2 is capitalized to yield highchargestorage properties. A facile hydrothermal technique was used to prepare nickel sulfide- nickel sulfoselenide nanosheets as a composite material without the use of any strongreducing agent. The 2D layered structure of the nanosheets contributes to the increased chargestorage ability at high current densities. Here, we report a high specific capacitance of 1908Fg-1 at a current density of 1 Ag-1 in the fabricated coin cell using PVA/KOH gel electrolyte.While operating at a high current density of 25 Ag-1, the device offers 259 Fg-1. The symmetricdevice at high charge densities has also ensured more than 92 % retention after 28000 cycles.The shelf life of the same coin cell was tested after 100 days and it exhibited 100 % retentionafter 3000 cycles at 10 A/g. The device with higher mass loading also showed 85 % retentionafter 60000 cycles proving the material’s stability.
Author(s): Caroline SC, Das B, Pramana SS, Batabyal SK
Publication type: Article
Publication status: Published
Journal: Journal of Energy Storage
Year: 2023
Volume: 68
Print publication date: 15/09/2023
Online publication date: 07/06/2023
Acceptance date: 21/05/2023
Date deposited: 22/05/2023
ISSN (print): 2352-1538
ISSN (electronic): 2352-152X
Publisher: Elsevier BV
URL: https://doi.org/10.1016/j.est.2023.107812
DOI: 10.1016/j.est.2023.107812
ePrints DOI: 10.57711/cecb-q359
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