“…One is dened as an electrical double layer capacitor (EDLC) in which electrical energy is electrostatically stored at an interface between a conductive electrode and an electrolyte. Typically, commercial EDLC electrode materials are porous carbon nanomaterials, such as activated carbon, 4 carbon nanotubes 5,6 and carbon aerogels, 7,8 which have large specic surface areas, good electron conductivities and stabilities. They are, however, limited by low specic capacitances and energy densities.…”