Sách Electrochemical Double-Layer Capacitors

The Double Layer as a Nanodielectric
Generally, every electrochemical cell works as an elec-
trical capacitor, if two metallic, oxidic, or carboneous
electrodes dip into an aqueous or organic solution. The
electrolytic double layer at the phase boundary between
every electrode and the electrolyte measures only a few
nanometers of thickness. Simplified, the electrolytic
double layer behaves like a plate capacitor. The capacitor
is formed, because the uncharged electrode surface gives
electrons into the inner electrode material and, charged
negatively through that, attracts counterions from the
electrolyte. The counterelectrode charges itself positively
against the surrounding solution. Electrode and electro-
lyte reach different electric potentials. The molecular
layer of absorbed ions at the electrode surface,