Hierarchical N- and O-Doped Porous Carbon Composites for High-Performance Supercapacitors

Figure 8

(a) CV curve of assembled symmetric ECs based on two KCP electrodes at a scan rate of 20 mV/s. (b) Galvanostatic charging/discharging curves of KCP//KCP symmetric ECs measured with different current densities. (c) Nyquist plots for KCP//KCP supercapacitor measured at 0 V DC potential; inset shows the corresponding equivalent circuit.

(a)

(b)

(c)