Figure 3. Electrochemical performance of the Si electrode.

(a) Cycling performances (C/2, 1.2 A g⁻¹), (b) coulombic efficiencies, and (c) the rate capabilities of the unit cells (Si/separator/Li metal, charged and discharged by changing the current density from C/2 (1.2 A g⁻¹) to 5C (12 A g⁻¹)).