Finally, we note that many other factors may affect capacitance beyond the carbon "back-bone" or "framework". The disorder vs. capacitance analysis has been performed here with capacitance values measured in an organic electrolyte. However, we and others have noted that functional groups beyond the C-C bonds that form the amorphous carbons back-bone may alter the overall charge of the carbon (as often quantified via a point of zero charge (PZC)). Particularly in aqueous electrolytes, where many of these functional groups (e.g., phenols, chromenes) can be protonated or deprotonated depending on pH, the role of these functional groups may also need to be considered. However, we note that both NMR and Raman provide well established methods for identifying and quantifying these species.