However, due to Coulomb interaction at the electrode, adsorbed species still contain both kinds of ions, and this procedure causes counter ions to enter extremely restricted locations . An equal amount of potential is stored on each electrode in a system with two electrodes. Charged double layers in a capacitor caused the charge-discharge process, which resulted in reversible electrostatic accumulation of charged species on the electrode surface . Both electrodes function as anodes and cathodes, respectively. Cathode and anode emit positive and negative ions, respectively, when the potential is applied.