More than 2-fold improvement in volumetric sorption capacity is achieved compared to all previous reports. The relationship between the total charge stored in the supercapacitors at different voltage windows and the gravimetric/volumetric sorption capacities also follows a linear pattern until -1.4 V (Figure ). Above -1.5 V there is a possibility of carbon electrooxidation along with increased leakage currents and decreased coulombic efficiency, which may reduce the adsorption capacity as well as adsorption rates. Their effect on SSA energetic performance at higher potential windows is discussed in the later section.