Direct-printing fabrication and characterization of rGO-CuS buckypaper electrode for supercapacitor

In this study, Buckypaper (BP) is fabricated by vacuum filtering method, used as a current collector for supercapacitors (SC). This BP is then directly printed with rGO-CuS hybrid nanomaterial ink onto its surface via a custom 3D printer. The structure of material components is characterized using transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM). Also, electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) analyses are conducted to estimate the electrochemical performance. The results show that the fabricated SC electrode is of good quality with a specific capacitance of 680.9 F/g at a scan rate of 5 mV/s. Besides, the electrode also has characteristic redox peaks and a stability of 94.3 % after 6000 discharges at a current density of 25 A/g.