Electrochemical performance of SnO2 after blending with Cu

In this work, SnO₂ nanoparticles (SnO₂ NPs) were synthesised using a leaf extract from Shorea robusta. The synthetic method was found to be reliable, cost-effective, and efficient. The synthesised SnO₂ NPs have been incorporated with copper (Cu) and used as an electrode material for supercapacitors (SCs). The potential of SnO₂ and its nanocomposite for SCs was investigated using various electrochemical parameters. At a current density of 2 A/g, the maximum specific capacitance of SnO₂@Cu-A, SnO₂@Cu-B, and SnO₂@Cu-C was found to be 220, 226, and 300 F/g. The maximum energy density of 11.1 Wh/kg for SnO₂@Cu-C has been evaluated at a power density of 1021.3 W/kg. After 5000 GCD cycles, a retention of 96.8% was found for SnO₂@Cu-C. Under two electrode systems, a retention of 95.4% was found for SnO₂@Cu-C.