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. 2025 Jun 5;15(1):19761.
doi: 10.1038/s41598-025-95088-6.

Synergistic integration of VSe2 and CuS nanostructures for advanced energy storage applications

Imran Khan  1 , Danish Arif  1   2 , Atta Ullah Shah  2 , Kashif Safeen  3 , Khalid M Alotaibi  4 , Basit Ali  5 , Wubshet Mekonnen Girma  6 , Akif Safeen  7
Affiliations

Synergistic integration of VSe2 and CuS nanostructures for advanced energy storage applications

Imran Khan et al. Sci Rep. .

Abstract

The demand for sustainable energy storage has driven advancements in supercapacitors, known for their high-power density and rapid charge cycles. However, challenges like limited energy density and material stability must be addressed for practical applications. In this study, VSe2/CuS nanocomposites were synthesized using a simple wet chemical method and investigated as electrode materials for supercapacitors. X-ray diffraction (XRD) analysis confirmed the phase purity of the materials while scanning electron microscopy (SEM) revealed spherical and flake-like morphology. The synergy between VSe2's high electrical conductivity and CuS's pseudocapacitive properties enhances charge storage and electrochemical performance. The VSe2/CuS electrode exhibited a high specific capacitance of 853.9 F/g at 1 A/g, outperforming individual VSe2 (395.6 F/g) and CuS (471.6 F/g). The VSe2/CuS||AC device demonstrated a specific capacitance of 147.6 F/g, excellent rate capability, and 88.3% capacitance retention over 10,000 cycles at 10 A/g. These findings highlight the potential of VSe2/CuS nanocomposites as high-performance electrode materials, advancing the development of next-generation energy storage technologies.

Keywords: Cyclic stability; Hydrothermal technique; Power density; VSe2/CuS composites.

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Conflict of interest statement

Declarations. Competing interests: The authors declare no competing interests.

Figures

Fig. 1
Fig. 1
Schematic illustration of the synthesis.
Fig. 2
Fig. 2
(a) XRD patterns of VSe2, CuS, and VSe2/CuS, (b) Raman spectra of VSe2, CuS, and VSe2/CuS, (c) Nitrogen adsorption–desorption isotherm of VSe2 and CuS, and (d) Nitrogen adsorption–desorption isotherm of VSe2/CuS nanocomposite.
Fig. 3
Fig. 3
SEM images of (a) VSe2 (b) CuS (c) VSe2/CuS.
Fig. 4
Fig. 4
EDX spectra of (a) VSe2 (b) CuS (c) VSe2/CuS.
Fig. 5
Fig. 5
CV plots of (a) VSe2 (b) CuS (c) VSe2/CuS and (d) Comparison of all electrodes.
Fig. 6
Fig. 6
GCD profiles of (a) VSe2 (b) CuS (c) VSe2/CuS (d) Comparison of all electrodes.
Fig. 7
Fig. 7
(a) Specific Capacitance versus Current density (b) Impedance plot zoom view (insert) of Impedance plot.
Fig. 8
Fig. 8
(a) CV plot of VSe2/ CuS||AC (b) GCD of VSe2/CuS||AC (c) specific capacitance as a function of energy density (d) Ragone plot.
Fig. 9
Fig. 9
(a) Cycle stability VSe2/CuS||AC (b) Impendence plot VSe2/CuS||AC.
See this image and copyright information in PMC

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