Figure 4

Electrochemical performance of the supercapacitor based on RGM electrode.

(a) Cyclic voltammetry measurements for RGM SC performed under different scan rates of 10, 20, 50, 100 and 200 mV s⁻¹. (b) Galvanostatic charge-discharge curves of a RGM SC at different current densities. (c) Specific capacitance and per-area capacitance of a RGM SC obtained from CC curves at different current densities. (d) Cyclic stability test of the RGM SC at the current density of 96 mA cm⁻². Data from control samples of pure RuO₂ nanoparticles are shown for comparison. (e) Plots of the potentiostatic electrochemical impedance spectroscopy (EIS) measurements conducted between 100 mHz and 1 MHz with an amplitude of 10 mV after 1^st and 8100^th cycle respectively.