The voltage profile depicted in Figure is zoomed in the upper plot of Figure , accompanied by its corresponding negative half-cell potential measured from the reference electrode. Two distinct plateaus emerge in the full cell voltage profile, mirroring the double plateaus identified in the negative half-cell potential plot. The more negative discharge potential, averaged at -0.3 V vs SHE, aligns well with the oxidation potential of the reduced species from the cyclic voltammetry profiles, while the less negative half-cell potential at 0.1 V vs SHE is close to the adduct species' potential signature. We attribute the differences between the cell potential and the CV potentials to the possible local pH and electrolyte composition differences. Given this distinctive potential separation, we can calculate the adduct formation by examining the capacity delivered at the voltage signature of the quinone-adduct compound. As depicted in Figure , extending the duration of CO2 purging from 15 minutes to 60 minutes clearly shows an increase in the capacity delivered at the potential signature of the adduct species. In separate experiments, we purged with 0.1 bar CO2 and 0.9 bar of N2 from the beginning of the experiment with a 120-minute purging during the rest-time, clearly demonstrating that such a prolonged purging duration would increase the capacity delivered by the adduct. Eventually, in the case of 7 hours of purging, the entire discharge capacity is exclusively delivered by the adduct species.