Dear Sir Nasani Narendar,

Thanks for your wonderful answer. Could you help me explain about Ws-R; Ws-T and Ws-P?

In equation: Capacitance = (R^(1-n)/n)*Q^(1/n), how about R? charge transfer resistance?

Thank you sir.

I am also searching for CPE T and CPE P .thank you all for your question and answers too

Can you please tell me the order and unit of the true capacitance otained from the above said calculation.

What is the difference between Q and Y0? Is Q the same as admittance?

@Vahid Salarhoseini:

Dear Vahid,

Q is CPE (Constant Phase Element) when you have (suppose to have) a depressed semicircle (an arc of circle) in Nyquist plot. So, it is another issue not admittance in first glance, but it could cover each element correspond to the its own phase (for example capacitance is a CPE with phase of 90 degree,....).

Hope to help

In some articles, symbol Y0 is used instead of the Q at CPE parameters. The difference here is my point. Please explain the differences between Y0 and Q in two attached articles

Dear Vahid,

Please read the help of Zview software it will assist you to have a better overview.

Hi dear researchers. Would you mind explaining about Ws-R, Ws-T , and Ws-P? How i can use them in my analysis?

Dear Ali Rajabtabar , in some articles they used CPE-T and CPE-P as you elaborated. But, from the software i used (NOVA) , it use CPE-Y0 and CPE-N.

It is both the same? if yes which CPE match for both term. Thankyou

Dear Hasbullah Alwi, Please have a look on your software help, if the value of parameter (e.g. CPE-N) is chosen between 0 to 1 (0 < CPE-P < 1 corresponds to how capacitive or resistive it is), then it should be CPE-P!

Ali Rajabtabar Thank for your answer, Noted as CPE-P is equal to CPE-N and it seems like it is dimensionless. If you dont mind, my nyquist plot of -z'' vs z' showed incomplete semicircle do you know what is the factor of this phenomenon? and what the diameter and height of the semicircle tell us? Thank you.

I afraid to be that true, but usually an arc diameter related to the materials or device (battery,...), represents Resistivity of grain or grain boundary (e.g. Rg and Rgb...) considering high and low frequency region, respectively. Also at the top of each semicircle, namely at fmax, you can calculate Capacitance or double layer capacitance...I think you should study about EIS data analysis, learning by doing and practice....

Ali Rajabtabar Thankyou for sharing your expertise and knowledge. Have a nice day forward