The effect of dielectric permittivity on the capacitance of nanoporous electrodes

By means of Monte Carlo simulations we show that a pore-width dependent dielectric permittivity, epsilon(p)(L), may diminish the pore-size dependence of the surface-specific capacitance. This is different from the case of a fixed dielectric permittivity, epsilon(p) = const, which leads to an increase of capacitance when the pore width becomes comparable to the ions size. (C) 2013 Elsevier B.V. All rights reserved.