Temperature-dependent electrochemical performance of CuS as electrode material for supercapacitor application

In this work, we synthesize copper sulfide as electrode materials using hydrothermal technique at different temperatures. The electrochemical performance of copper sulfide electrode in 3-electrode systems using 2 M KOH electrolyte is thoroughly studied using electrochemical techniques such as CV, GCD and EIS. The sample synthesized at 160 °C demonstrates that it has a specific capacitance of 232.5F/g at a charge–discharge current density of 1 A/g, maintains cyclic stability of 72.57 % during 500 GCD cycles at 5 A/g, highlighting its potential for supercapacitors applications. The results demonstrate that temperature significantly alters the electrochemical properties of the CuS.