Figure 5. Electrochemical characterizations of NiO nanosheets/carbon cloth based half-cells.

(a) Representative galvanostatic discharging-charging voltage profiles at a current density of 100 mA g⁻¹ in the voltage range of 0.01–3 V; (b) Capacity versus cycle numbers at 100 mA g⁻¹ and the corresponding Coulombic efficiencies; (c) The rate performance of the electrode at various current densities. (d) Capacity of the electrode versus cycle numbers at the current density of 700 mA g⁻¹ and the corresponding Coulombic efficiencies.