fig4
Figure 4. (A) Cyclic voltammetry curves of GNBC samples at 100 mV/s, (B) Charge-discharge profile of GNBC samples at 0.5 A/g, (C) comparison of specific capacitance at different current densities for GNBC samples, (D) CV curves measured using GNBC6 electrode at different scan rates in a two-electrode cell, (E) specific capacitance of GNBC6 at different current densities and the inset displays the corresponding GCDs, and (F) two electrode EIS spectra of GNBC6 sample.