We demonstrate for the first time that the incorporation of a redox-active molecule in an
organic electrolyte can increase the cell voltage of a supercapacitor. The redox molecule
also contributes to increasing the cell capacitance by a faradaic redox reaction, and
therefore the energy density of the supercapacitor can be significantly increased. More
specifically, the addition of redox-active decamethylferrocene in an organic electrolyte
results in an approximately 27-fold increase in the energy density of carbon-nanotube …