Mesoporosity (pore sizes > 2 nm) is often associated with providing transport channels for rapid electrolyte movement, while microporosity (pore sizes < 2 nm) is linked to enhancing performance at low current densities due to its charge-storing surface interactions . To examine the role of mesoporosity on rate capability, we performed rate capability measurements on nanoporous carbons with varying combinations of micro-and mesopores (Figure ) and analyzed the correlations between rate capability and mesopore/micropore specific surface areas (SSAs, Figure ). We did not observe a strong correlation between rate capability with microporosity of mesoporosity (Figure ). This suggests that mesoporosity is not the primary determinant of rate capability . SSA measurements obtained from N₂ adsorption can overestimate the surface area accessible to electrolyte molecules as the narrow micropores accessible to N2 molecules might be inaccessible to the larger electrolyte ions. As a result, the SSA derived from N₂ adsorption may not accurately represent the active surface area involved in electrochemical processes. Importantly, supercapacitor performance is driven not solely by surface area but by the efficient transport of ions through the pore network , which is expected to depend on pore interconnectivity. Therefore, we hypothesized that directly studying electrolyte transport over longer length scales within the porous network using PFG NMR would provide a more accurate depiction of the factors determining good performance at high current density.