Dear academicians!
I measured impedance spectroscopy for a solid electrolyte to study its bulk, grain and grain boundary ionic conductivity. But I am confused how to identify the bulk resistance (Rb), grain resistance ((Rg) and grain boundary resistance (Rgb) from the attached Nyquist plot. Furthermore, which type of equivalent circuit model is more appropriate for this plot?
Thanks in advance for your help
Dear Yosef Nikodimos ,
what is
1) your cell (electrodes' materials, 2 or 4 electrodes, etc.),
and what are
2) your EIS setup parameters (VDC polarization, etc.) ?
Dear Professor Ioannis Samaras , thank you for your response
I used two electrode system of Electrochemical impedance spectroscopy in the frequency range of 10-2 – 106 Hz.
Dear Yosef Nikodimos , At first view, it seems to me like R1(R2||C1)(R2||C2)W1. However, I think it is always better to measure it by 4 points method instead of two. And I think that if you increase frequency it would be more easier to find model which is fit it.
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