Figure shows a quantitative comparison of the SSA energetic and adsorptive performance at different potential windows. These metrics are calculated from the voltage and CO2 concentration profiles in Figure . Formulas and tabulated results are provided in section S5 and Table in the supporting information, respectively. The gravimetric capacitance increases from 173 F.g - at -1 V to 181 F.g -1 , 183 F.g -1 , and 196 F.g -1 at -1.2 V, -1.4 V, and -1.6 V, respectively (Figure ). The increase in capacitance is due to increased pore utilization and/or enhanced pseudocapacitive contribution from hydrogen sorption at higher potentials. The SSA gravimetric adsorption capacity (AC) achieves a record high value of 312 mmol.kg - The volumetric capacitance and volumetric adsorption capacity also follow the same pattern (Figure ) as the gravimetric capacitance and gravimetric adsorption capacity (85.7 mol.m -3 at -1 V, 105 mol.m -3 at -1.2 V, 126 mol.m -3 at -1.4 V, and 133 mol.m -3 at -1.6 V, respectively).