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