Abstract
The study of 26 microporous carbons with average pore widths Lo between 0.7 and 1.8nm shows that the volume-related capacitance Cmi (Fcm−3) in the organic electrolyte (C2H5)4NBF4/acetonitrile is an inverse function of the average micropore width Lo. This means that for a given micropore volume Wo, the gravimetric capacitance C (Fg−1) is larger for carbons with smaller pores due to the higher surface to volume ratio. Furthermore, the increase of Cmi (Fcm−3) in smaller pores suggests that the surface-related capacitance C (Fm−2) should be relatively constant in slit-shaped micropores. This has important technological consequences for the design of carbon-based supercapacitors.
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