Figure 2.

(a) Cyclic voltammetry measurements of PMo₁₂–PPy/RGO during the first three cycles at a scan rate of 0.2 mV s^–1. (b) Discharge–charge curves of PMo₁₂–PPy/RGO for different cycles constantly at 100 mA g^–1. (c) Charge/discharge capacity and Coulombic efficiency (CE) of PMo₁₂–PPy/RGO, PMo₁₂/RGO, and PMo₁₂ at 100 mA g^–1. (d) Rate performance of the PMo₁₂–PPy/RGO at various current densities.