Figure 5
Cyclic voltammograms of MnO 2 materials. After five charging-discharging cycles measured at a scan rate of 0.05 mV s−1in the potential range of 0.01 ~ 3.60 V. (a) Caddice-clew-like and (b) urchin-like MnO2 samples.
Figure 5 | Nanoscale Research Letters