Figure 2
Galvanostatic electrochemical evaluation of nano-sized Co3O4/Li half-cell at a rate of C/5 during 100 cycles:a discharge/charge voltage profiles between 0.01 and 3.0 V at a rate of C/5, andb plot of discharge/charge capacities against cycle number. The closed and open circular symbols denote the discharge and charge capacities, respectively. The closed triangular symbol indicates coulombic efficiency