Figure 4

(Ozoemena):

Comparative supercapacitive performance of the three different ANP electrodes using three-electrode (half-cell) configurations with nickel foam as the working electrode and 3M KOH as the aqueous electrolyte: (a) Typical CV curves at 10 mVs⁻¹, insert shows the gavanostatic charge-discharge (GCD) curves at 5 A g⁻¹; (b) GCD curves between 3 and 50 A g⁻¹; (c) Specific capacitance vs. current density, i.e., rate capability test; (d) durability test for 5,000 continuous GCD cycles at 10 A g⁻¹; (e) Ragone plots compared with other similar electrode materials reported in literature using 3-electrode configurations^{12,13,22,23,24}; (f) Nyquist plot of 3 M KOH solution (inset; magnified view).