Figure 6

(a) Specific charge/discharge capacities of CNT (circles) and Mn₃O₄@CNT (diamonds) at 100 mA g⁻¹, and the calculated contribution of the incorporated Mn₃O₄ (squares), based on a filling of 29.5 wt%. (b) Charge/discharge capacities and the corresponding coulombic efficiencies of Mn₃O₄@CNT at 100 mA g⁻¹ (diamonds) and 500 mA g⁻¹ (circles).