Abstract
The instrument and experimental method of electrochemical impedance were described. The simple criteria to select the Nyquist plot or Bode plot was revealed. Some equivalent circuits were presented and its analytical procedure was shown. The physical meaning of inductive behavior was explained by the calculation of Faradaic impedance. Finally, the 3-D plot (real, imaginary and time axes) to compensate the impedance, which does not have time stability, was introduced.
