fig6

Figure 6. (A) CV curves of AC and Co₃S₄/rGO-160-8 at 10 mV·s^-1; (B) CV curves of Co₃S₄/rGO-160-8//AC at different scan rates; (C) GCD curves of Co₃S₄/rGO-160-8//AC at different current densities; (D) Rate performance; (E) Ragone plot of Co₃S₄/rGO-160-8//AC; (F) Cycling stability and Coulombic efficiency at a current density of 4 A·g^-1. CV: cyclic voltammetry; AC: activated carbon; rGO:reduced graphene oxide; GCD: displays the galvanostatic charge-discharge.