Cobalt-ZincSulphate@Activated Carbon Composite as a High- Performance Electrode Material for Supercapacitors
Abstract
In this study, a novel cobalt-zinc sulphate (CoZnSO4)/activated carbon (AC) composite was synthesized in the laboratory and studied as an electrode material for supercapacitor application. The composite material was fabricated using a facile hydrothermal route followed by thermal activation. The structural and morphological characteristics were analysed by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Brunauer–Emmett– Teller (BET) surface area analysis, and scanning electron microscopy (SEM). Electrochemical studies, including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge/discharge (GCD) measurements, revealed that the CoZnSO4@AC composite exhibited excellent capacitive performance, with a specific capacitance of 812 F/g at a scan rate of 5 mV/s and an outstanding cyclic stability over 5000 cycles. These results suggest that the synergistic interaction between the CoZnSO4 and activated carbon enhances both charge storage and transport, making it a promising candidate for application in high- performance supercapacitors.
Keywords
Cobalt-zinc sulphate
Activated carbon
Supercapacitor
Pseudocapacitance
References
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