Facile synthesis of efficient construction of tungsten disulfide/iron cobaltite nanocomposite grown on nickel foam as a battery-type energy material for electrochemical supercapacitors with superior performance

Abstract

In this research literature, a tungsten disulfide/iron cobaltite (WS₂/FeCo₂O₄) interwoven construction array was prepared by a simplistic hydrothermal approach on Ni foam as an integrative electrode for supercapacitors (SCs). For characterization of the wearing of WS₂ nanostructure on FeCo₂O₄ nanosheets (WS₂/FeCo₂O₄) by the Scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The WS₂/FeCo₂O₄ nanosheets supply a larger surface region and sufficient space to allow for volume changes. Moreover, considerable features of wellbeing conductivity from the Ni foam conductor and the synergistic procedures between WS₂ and FeCo₂O₄, the integrated WS₂/FeCo₂O₄ composite achieved prominent SCs storage performances with a higher specific capacity of 1122C g^-1 (2492.9F g^-1) at 1 A g^-1 and notable capacity retention of 98.1% at 3 A g^-1 after 5000 long cycles and retained higher rate capacity of 951.9 C g^-1 at 15 A g^-1. For practical application, an asymmetric supercapacitors type WS₂/FeCo₂O₄//active carbon (WS₂/FeCo₂O₄//AC) device was successfully prepared. The WS₂/FeCo₂O₄//AC device displays a higher specific capacity of 110C g^-1 and energy density of 85.68 W h kg^-1 at power density at 897.65 W kg^-1, as well as the superior initial capacitance of 98.7% with cyclic stabilities after 4000 long cycles. Thus, these results indicated the great potential of the constructed WS₂/FeCo₂O₄//AC in the scenario electrochemical properties due to their outstanding energy storage activities.

Keywords: Asymmetric supercapacitors; Better capacity; Favored electrode material-type; High energy storage; Hydrothermal procedure; Tungsten disulfide/iron cobaltite interwoven construction.