2.1. Ion Desolvation in Nanoslit
A
positively charged microporous TiC-CDC electrode with specific PSD is
depicted in Figure 1 .
The
PSD represents the probability distribution of the nanopores with
different pore sizes embedded in the microporous electrode. Here we
model each nanopore with nanoslit composed of two parallel charged flat
surfaces.
The
measured PSD of the microporous electrode material prepared by Chmiola
et al12 is depicted in Figure 1(a) ,
indicating that the pore widths of most pores are between 0.5 nm and 0.7
nm, and this clearly states that the nanoscale pores are dominant for
determining the electrochemical properties of microporous electrodes.
In
most cases, the ions solvated in liquid electrolytes need to remove
their solvation shells in order to penetrate into tiny pores. This
process is conventionally referred to as ion desolvation, which can be
often observed when ions transport through
bio-channels.41