The above results demonstrate the

Fig. 5. (a) and (b) Charge and discharge profiles and cycling performance of the p-MnO/RGO electrodes at Rotundine current density of 100 mA g−1 in the voltage range of 0.01–3.0 V vs. Li/Li+; (c) cycling performance of pure MnO electrode under the same experimental condition. (d) Rate performance of the p-MnO/RGO electrodes at different current densities.Figure optionsDownload full-size imageDownload as PowerPoint slide
Fig. 6. (a) Nyquist plots of pure MnO and p-MnO/RGO electrodes. The inset shows the equivalent circuit used to fit the Nyquist plot. (b) Graph of rhizome Z′ plotted against ω−1/2 at low frequency region (10–0.1 Hz) for pure MnO and p-MnO/RGO electrodes.Figure optionsDownload full-size imageDownload as PowerPoint slide
Table 1.
Kinetic parameters of pure MnO and p-MnO/RGO electrodes.SampleRs (Ω)Rf (Ω)Rct (Ω)CPE1 (F)CPE2 (F)DLi (cm2 s−1)Pure MnO5.5153.221.76.1×10−65.7×10−64.2×10−14p-MnO/RGO7.6212.593.18.6×10−78.2×10−56.1×10−12Full-size tableTable optionsView in workspaceDownload as CSV