NMR measurements of electrolyte-soaked samples supported the findings from Raman Spectroscopy. The F MAS NMR spectra of the electrolyte-soaked carbons exhibit at least two resonances for the BF4 -anions (Figure ), as in previous studies, with the left-hand resonances assigned as "ex-pore" anions and the right-hand resonances assigned as "in-pore" anions. The Δδ value is defined as the chemical shift difference between the in-pore and neat electrolyte resonances as in equation ( ), and is dominated by the graphenelike domain sizes, with the carbon pore size having a minor impact on Δδ for predominantly microporous carbons. Notably, the Δδ values observed here are much lower in magnitude than for conventional commercial activated carbons, and Δδ decreased in magnitude as the synthesis temperature was decreased from 700 to 600 ºC (Figure ). The carbons with higher gravimetric capacitances generally have Δδ values of smaller magnitude (Figure , Table ), consistent with our earlier findings, with the exception of HTC-750 ºC (see below). This trend still holds at a high current density of 1 A g -1 (Figure ). This again suggests that the increasing capacitance at lower synthesis temperatures from 700 to 650 to 600 ℃ results from the decrease in the graphene-like domain sizes in nanoporous carbons.