Figure 5

Galvanostatic charge/discharge curves of (a) three supercapacitors assembled in parallel and (b) four supercapacitors connected by combining two in series and two in parallel, the inset showing that the corresponding supercapacitors can be used to power a LED for 8 min; (c) optical photograph of two flexible, all-solid-state GHPC-based supercapacitors connected in series and a schematic diagram of the all-solid-state supercapacitor, (d) the charge and discharge curves and (e) areal and volumetric capacitances as a function of current density for one flexible all-solid-state GHPC-based supercapacitor; (f) a red LED lightened by two flexible supercapacitors connected in series under bending state.