Quaternary Cu₂FeSnS₄/PVP/rGO Composite for Supercapacitor Applications

Abstract

Electrochemical energy storage is a current research area to address energy challenges of the modern world. The Cu 2 FeSnS 4 /PVP/rGO-decorated nanocomposite using PVP as the surface ligand was explored in a simple one-step solvothermal route, for studying their electrochemical behavior by designing asymmetric hybrid supercapacitor devices. The full cell three-electrode arrangements delivered 748 C/g (62.36 mA h/g) at 5 mV/s employing CV and 328 F/g (45.55 mA h/g) at 0.5 A/g employing GCD for the Cu 2 FeSnS 4 /PVP/rGO electrode. The half-cell two-electrode device can endow with 73 W h/kg and 749 W/kg at 1 A/g energy and power density. Furthermore, two Cu 2 FeSnS 4 /PVP/rGO//AC asymmetric devices connected in series for illuminating a commercial red LED more than 1 min were explored. This work focuses the potential use of transition-metal chalcogenide composite and introduces a new material for designing high-performance supercapacitor applications.

Facile, Efficient, and Cheap Electrode based on SnO2/Activated Carbon Waste for Supercapacitor and Capacitive Deionization Applications

“…The voltage (ohmic) drop of SnO 2 /ACW-calcined electrode is very small compared with ACW and ACW- calcined indicating low DC internal resistance. 13 , 21 Also, the slow discharge time of the calcined SnO 2 /ACW electrode expresses its high capacitance. Figure 6 b indicates the calculated specific capacitance ( C sp ) variation with the actual charge–discharge current investigated in Na 2 SO 4 electrolyte for the prepared electrodes in the three forms.…”

“… 12 Liu and co-workers demonstrated a flexible and light-weight supercapacitor based on bacterial nanocellulose incorporated with tin oxide (SnO 2 ) nanoparticles, GO, and poly(3,4-ethylenedioxyiophene)-poly(styrene sulfonate) (PEDOT: PSS) with a SC of 445 F g –1 at 2 A g –1 . 13 …”

Morphological evolution of carnation flower-like Cu2CoSnS4 battery-type electrodes

“…The instrumentation details of all the characterization tools are detailed in our previous articles. 30,31…”

“…Where 'I × dv'signifies area under the CV curve, 'I' -discharge current (A), '∆𝑡'discharge time (s), d𝑣 implies applied potential window (V), 'ν' means scan rate (mV/s), and 'm' represents active materials mass (mg) coated on the electrodes surface. The instrumentation details of all the characterization tools are detailed in our previous article [30,31].…”

“…The instrumentation details of all the characterization tools are detailed in our previous articles. 30,31 2.3. Fabrication of an asymmetric solid-state supercapacitor (ASSC)…”