Figure 5

(a) CV curves at the scan rate of 50 mV s⁻¹ and (b) GCD cures at the same scan rate of 1 A g⁻¹ of the samples with different PVA content; (c) CV curves and (d) GCD cures of the HPCAs-0.4-800 sample at different current densities; (e) Specific capacitances of the samples with different PVA content at the current density of 0.5-20 A g⁻¹; (f) Electrochemical impedance spectra of 3D HPCAs as Nyquist plots.