Fig. 4
From: Xylan derived carbon sphere/graphene composite film with low resistance for supercapacitor electrode
a CV curves of rGO and aXCS0.05–0.2/rGO at scan rate of 5 mV/s, b CV curves of aXCS0.2/rGO at scan rate of 5, 10, 20, and 50 mV/s, c GCD curves of aXCS0.2/rGO at current density of 1, 2, 5, 10 mA/cm2, d EIS spectrum of rGO and aXCS0.05–0.2/rGO