Abstract:
The supercapattery device, a renowned electrochemical energy storage device,
is comprised of a supercapacitor and a battery electrode, resulting in remarkable energy
and power capability of the fabricated device. These hybrid supercapacitors can overcome
the ongoing energy demand as they exhibit high energy (Es) and power (Ps). Therefore,
we have synthesized transition metal sulfide by employing the hydrothermal technique,
including CuZnS (1:3, 1:1 and 3:1) nanoparticles, single-walled carbon nanotubes
(SWCNTs)/CuxZn1-xS) nanocomposites (mixed in 1:3, 1:1, and 3:1 weight percentage
ratios) and are tested in three-electrode cell in which the sample SWCNTs/C3Z1S depicts
better outcomes. An efficient synthesis was confirmed, and distinctive morphological
properties of the materials have been identified employing advanced characterization
approaches. Both X-ray diffraction (XRD) and Fourier transform infrared spectroscopy
(FTIR) validated the synthesis mechanism. Notably, we achieved a specific capacitance of
3494.417 Fg-1
at 5 mV/s and 2467.5 Fg-1
at 0.5 Ag-1
. The Asymmetric supercapacitor
device (SWCNTs/C3Z1S || AC) has energy and power densities of 66.70 Whkg-1
and 425
Wkg-1
at the current density of 0.5 Ag-1
. The Asymmetric supercapacitor also demonstrated
99.5% Coulombic efficiency and 93.7 % capacity retention over 4000 cycles. Furthermore,
the electrode material comprising (SWCNTs/C3Z1S) shows significant potential for
advanced supercapacitor technology.
