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Low cost and efficient one-step facile hydrothermal synthesis was used to synthesis CoS@WS2 composite on the surface of nickel foam and evaluated as an electrode material for high-performance supercapacitors. Electrochemical impedance spectroscopy, galvanostatic charge–discharge tests, and cyclic voltammetry were used to evaluate the electrochemical characteristics of the CoS@WS2 electrode. A high-specific capacitance of 2442.32 F g−1 at a current density of 4.28 A g−1 was noted for CoS@WS2. The fabricated CoS@WS2 electrode material displayed acceptable rate capability (97.1% capacitance retention at a current density of 4.28 A g−1) and good cycling stability over 3000 charge–discharge cycles. The advanced electrochemical characteristics of CoS@WS2 were contributed to the synergistic effect and high surface area. The greater electrochemical performance of nanoparticles-like CoS@WS2 composite attracts their capacity to meet the requirements of applied electrochemical energy-loading applications. Over all, these results demonstrate that the synthesis of layered CoS@WS2 could be a promising for applied electrochemical energy-loading applications. [ABSTRACT FROM AUTHOR]

Nanocomposite electrodes receive much attention because of their excellent energy storage nature. Electrodes for supercapacitors have come a major source of interest. In this pursuit, the current work elucidates binder-free coral reefs resembling ZnO/CoS2 nanoarchitectures synthesized on the surface of Ni foams employing the cost-effective hydrothermal route. The Zno/CoS2 nanocomposite demonstrated excellent battery-type behavior, which can be employed for supercapcitor application. Various analyses were carried out in the current study, such as X-ray diffraction and high-resolution scanning electron microscopy, which allowed defining the crystalline nature and morphology of surface with ZnO/CoS2 nanoarchitectures. Electrochemical measures such as cyclic voltammetry, galvanostatic charge discharge, and potentiostatic impedance spectroscopy confirmed the battery-type behavior of the material. The synthesized precursors of binder-free ZnO/CoS2 nanostructures depicted an excellent specific capacity of 400.25 C·g−1 at 1 A·g−1, with a predominant cycling capacity of 88. 2% and retention holding of 68% at 10 A·g−1 and 2 A·g−1, even after 4000 cycles, representing an improvement compared to the pristine ZnO and CoS2 electroactive materials. Therefore, the electrochemical and morphological analyses suggest the excellent behavior of the ZnO/CoS2 nanoarchitectures, making them promising for supercapacitors. [ABSTRACT FROM AUTHOR]