Fig. 4. (Color online) (a) CV curves of WNAC at scan rate of 5 mV s-1 for potential window of -0.35 V to 0.45 V. (b) Specific capacitance and (c) peak current density for WNAC. (d) Galvanostatic discharge curves of WNAC for potential window of -0.25 V to 0.45 V at current density of 5 A g-1. (e) Nyquist plots of WNAC for frequency range of 0.01–10 kHz, inset of (e) equivalent circuit for WNAC. (f) Cycle test of WNAC at current density of 3 A g-1.
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