Figure 5. Cycle performance and rate capability of pristine, SP-5, SP-10 and SP-30 cathodes at different testing conditions: (a) 0.2 C, (b) at incremental C rates of 0.2, 1, 2, 5, 10 and 20 C (same current densities for charge/discharge) and (c) 10 C charge and 1 C discharge after an initial C/20 forming cycle.

All the half batteries were cycled between 2.0 and 4.8 V at room temperature where 1 C stands for 250 mA·g⁻¹.