fig3

Figure 3. Electrochemical performances of NDPCs measured by three-electrode system: (A) CV curves at 10 mV s^-1, (B) GCD curves at 1 A g^-1, (C) rate performances of gravimetric capacitance and volumetric capacitance. (D) Contribution of fast-kinetic process at 200 mV s^-1, and (E) percentage of capacitance contribution at different scan rates of NDPC-0.5. (F) Nyquist plots, (G) relationships between Z′ and ω^-0.5 at low-frequency region, (H) the calculated diffusion resistance (Z_w), electrical resistance (R_s) and charge-transfer resistance (R_ct), and (I) Bode plots of NDPCs.