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Nickel sulfide-nickel sulfoselenide nanosheets as a potential electrode material for high performance supercapacitor with extended shelf life

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.

Publication metadata

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


DOI: 10.1016/j.est.2023.107812

ePrints DOI: 10.57711/cecb-q359


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