Figure 8

(a) CV curves at different scan rates and (b) GCD curves at different current density of MF45-AC, (c) CV curves of AC, MF, MF25-AC, MF45-AC, and MF65-AC at a scan rate of 20.0 mV/s, and (d) GCD curves of all prepared electrode at 1.0 A. g^-1.