Recently, there is a tremendous interest in increasing energy density of electrochemical capacitors for high-pulse applications, e.g., electric vehicles. In the electrical double layer (EDL) capacitors, the charges are stored in the electrode/electrolyte interface using high-surface area materials 1. Activated carbons are the most frequently utilized materials, because they are cheap and they can be produced with a large pore volume, enabling high values of capacitance 1. However, a good matching between the electrode pore size and the dimensions of the ionic species is critical for an optimal performance of these systems 2-5. In practice, it is difficult to figure the ideal dimensions of both partners forming the EDL, due to the facts that activated carbons are characterized by a broad pore size distribution and the ions are not all solvated by the same number of solvent molecules.
展开▼
