Figure 7From: Facile synthesis and strongly microstructure-dependent electrochemical properties of graphene/manganese dioxide composites for supercapacitorsCycling performance of the supercapacitors based on graphene/MnO 2 composites. The capacitance retention is roughly 75%, 83%, and 93% after 3,000 cycles of charging and discharging at a current density of 2 mA for the microwave reaction times (a) 5 min, (b) 10 min, and (c) 15 min, respectively.Back to article page