Figure 4

(a) Schematic diagram and photographs of the fabrication process of flexible all-solid-state supercapacitors based on photoreduced graphene oxide (PRGO) films. (b) Cyclic voltammogram (CV) curves of all-solid-state supercapacitors at different scan rates. (c) Cycling stability of the all-solid-state supercapacitors under repeated bending/extending tests.