I did a EIS on my nanomaterial electrode in a blank solution (PBS solution) to calculate the double-layer capacitance. Fitting the Nyquist plot with an equivalent circuit of R1+Q2/(R2+W2), the built-in analysis software in EC-LAB gave me the values for R1, Q2, a2, R2 and s2. How do I calculate the Warburg impedance value and double-layer capacitance value?? I'm very new to EIS and in need of a lot of help.. I appreciate any feedback. Thank you!!
Dear Sooyoun
Refer to the following attached note:
"Basics of Electrochemical Impedance Spectroscopy".
It should be useful.
Dear Yu,
Double-layer capacitance can be calculated using your fitting parameter Q2, R2 and CPE exponent (value is in between 0 to 1).
You can follow the below reference for required equation:
1.Singh et al. J. Electrochem. Soc., 2015, 162, F489–F498.
2. Bera et al. J. Electroanal. Chem., 2017, 805, 184–192.
Best Regards,
Bapi
You can use Z-View_software,also you can follow the below
https://www.researchgate.net/post/What_is_the_best_software_to_fit_EIS_data
https://www.researchgate.net/post/Need_for_Z-View_software
https://www.researchgate.net/post/What_is_the_best_and_free_software_for_impedance_spectra_fitting_and_analysis2
https://www.researchgate.net/post/How_to_fit_Electrochemical_impedance_using_zview_software
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