What is imaginary impedance?
Since an AC potential is applied to the cell, there will probably be a phase shift between the applied AC potential and the AC current response. Therefore, the impedance can be represented using a vector diagram displaying the in-phase (Z’) and out-of-phase (Z”) impedances, the total impedance, and the phase angle. Since complex number terminology is also used when analyzing impedance spectra, the in-phase and out-of-phase impedances are often referred to as real and imaginary impedances.
