fig4

Figure 4. (A) Initial discharge and charge profiles of cells with different cathodes; (B) Initial discharge-charge plots of cells with different cathodes with a capacity limitation of 500 mAh g-1 at a current density of 0.1 mA g-1; Selected discharge-charge curves at different cycles of (C) Ru/CNTs and (D) Ru/TiO2/CNTs (E) Potential-time curves of cells based on different cathodes at a current density of 100 mA g-1 with a fixed specific capacity of 500 mAh g-1.