1 represents the DC resistance of the RCT specimen. The capacitor C B represents the specimen capacitance due to the electrolyte in the pore space. The electrode elements R E and C E represent the impedance response of the electrodes due to polarization and charging effects. Impedance plane plot of the circuit in Fig. Typical impedance spectroscopy result from measurements made on the RCT setup.
Solid circles represent data at decade frequencies.
The equivalent circuit in Fig. 1 is composed of parallel resistors and capacitors connected in series. The circuit in Fig. 1 can exhibit both a capacitive and resistive response. For some values of , the current and the voltage are nearly in phase.