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Synergistic effect of Echinops flower-like Copper sulfide@Cadmium sulfide heterostructure for high-performance all-solid-state asymmetric supercapacitor

Balu, Ranjith, Panneerselvam, Anthoniammal, Rajabathar, Jothi Ramalingam, Devendrapandi, Gautham, Subburaj, Surender, Anand, S., Veerasamy, Uma Shankar and Palani, Suganya 2023. Synergistic effect of Echinops flower-like Copper sulfide@Cadmium sulfide heterostructure for high-performance all-solid-state asymmetric supercapacitor. Journal of Energy Storage 72 , 108447. 10.1016/j.est.2023.108447
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The fascinating properties of transition metal chalcogenides, including their distinctive morphologies, large surface areas, crystal structures, tunnel bandgaps, and structural stability, have led to a widespread acceptance of these compounds as ideal electrode materials for energy and environmental applications. Incorporating additional metal chalcogenides into metal chalcogenides to form a heterostructure can further enhance their electrical conductivity and provide them with more active sites. Herein, a simple hydrothermal method is used to synthesize a heterostructure CuS@CdS nanocomposite by integrating Copper sulphide and Cadmium sulphide. X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy were used to ascertain the phase formation and structural properties of the synthesized compounds. The electrochemical properties of the obtained materials were investigated. In a three-electrode configuration, a heterostructure CuS@CdS nanocomposite delivers high-specific capacitance (543.6 Fg−1 at 1 Ag−1) with excellent rate capability and outstanding cycling stability. A heterostructure CuS@CdS nanocomposite and activated carbon were employed as the negative electrode/positive electrode to construct an all-solid-state asymmetric supercapacitor device for real-world applications. This fabricated device exhibits a high energy density of up to 34.9−1 and power density of 798.1−1 and outstanding cyclic stability and retains up to 95.5 % over 3000 cycles. The outstanding results demonstrate that the CuS/CdS nanocomposite is an appropriate electrode material for a high-performance supercapacitor.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Elsevier
ISSN: 2352-152X
Date of First Compliant Deposit: 12 September 2023
Date of Acceptance: 18 July 2023
Last Modified: 16 Nov 2023 21:46

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