Figure 4

(a) CV curves of NP-3DG and 3DG measured at a scan rate of 1 mV s⁻¹ (b) Charge/discharge curves of NP-3DG and 3DG at a current density of 0.1 A g⁻¹ (c) Specific capacity of NP-3DG and 3DG at various scan rates (d) Nyquist plots of NP-3DG and 3DG electrodes and equivalent circuit (inset) at 1 M NaCl aqueous solution.