Can anybody explain ,how to calculate the grain boundary capacitance directly (C gb) from Constant Phase Element (CPE)?

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Farha Jabeen

First, you have to fit your data by using any impedance fitting software. When the fitting gets done, you can use this equation, C = (Q^(-1/n)) / (jω)^n

Where Q is the CPE constant, j is the imaginary unit, ω is the angular frequency, and n is the CPE exponent.

Manoj Kumar Rout

Thanks Farha Jabeen

Santanu Sen

If you're using ZsimpWin licensed version, the values of the parameters you're looking for comes out after the successful fitting