Hi,

For better Impedance data fitting, you may also try Z-view and Z-SimpWin software. Z-view allows you to draw circuit and then you can fit your data, whereas in Z-SimpWin, you have a set of equivalent circuits to which you can try fitting your data with. Also, you can fit your data with many equivalent circuits and to find the most suitable circuit.

There are some links which may be useful:

1.https://www.gamry.com/application-notes/EIS/basics-of-electrochemical-impedance-spectroscopy/ 2.https://www.gamry.com/application-notes/EIS/equivalent-circuit-modeling-using-the-gamry-eis300-electrochemical-impedance-spectroscopy-software/

hi, thanks for your concern, Its really helpful I am actually using z-view, somehow I dont understand, My nyquist plot always brings Zimp with negative values I dont know how to fix it?Please see in attached file. May be because of this negative value my resistane always come with negative value like R1.

Or may be its usual, But I see positive Zimp graph at my versa studio software which used for EIS, but when I put data in Z-view Its turn to Negative Z-Imp.

I am a beginner in this field, I want to know how we can cop with equivalent circuits, Please give me a basic reference to read about equivalent circuits... because I dont know how to fit the data and reduce error.

Dear Zaidi,

Please check following link. http://al-chemist.info/node/156

Good luck