Therefore, by facilitating the Na ! diffusion either by an increase in time or temperature, eventually, the transport of sodium ions ceased when the sodium ion electrochemical potential gradient approached zero, and both sets of data converged. However, after time τ, the measured voltage using a high impedance meter with negligible current flow through the meter and blocking electrodes to sodium ions, corresponds to the calculated Nernst voltage. The cell acts as a charged parallel plate capacitor after reaching equilibrium. While the capacitor impedance is inversely proportional to frequency, the capacitance doesn't contribute to the impedance measurement. proven that a significant effect resulting from inductive load from the leads and instrument contributes to the EIS data, especially at a high-frequency regime. Therefore, it is crucial to subtract the inductive load effect from the obtained data to eliminate the effect of instrumentation and leads . This inductance appears as an imaginary part of the impedance data in the positive direction of the imaginary part of the impedance axis. Notably, there is a non-considerable dependence of inductance on temperature, unlike the sample's behavior. The extrapolation of the data to the x-axis (Z′ real part of complex impedance) was considered as measured resistance. The equivalent circuit for the NZGO + YSZ sample is presented in figure (a). In the high-frequency regime, grain boundary capacitances are shorted. Also, the electrode parameters (R P , C P ) are not reflected in the high-frequency regime. Therefore, after subtraction of induction load from the data, at high-frequency intercepts, measured resistance can be given by