Interpreting electrochemical impedance spectroscopy (EIS) circuits

[electrogeek]

Hi all,

I'm fairly new to electrochemical impedance spectroscopy (EIS). On some slides I was given, I have been provided with two circuits which would produce the same nyquist plot. I was wondering what real-world scenario these circuits would relate to. I know that the left-most resistor in each represents the resistance of the solution, but am unsure about the rest of each circuit. Any suggestions would be greatly appreciated, or resources which I can look at to get a better understanding.

Best wishes,

Electrogeek

 

[berkeman]

Welcome to PF.

Is this for schoolwork? What information sources do you have for this work?

 

[electrogeek]

This is my own research. I've read a few tutorials that only consider simple systems (e.g: Randles circuit), but am looking to see how more complex scenarios fit.

 

[berkeman]

Hmm, I found a pretty good article on Wikipedia: https://en.wikipedia.org/wiki/Dielectric_spectroscopy

What is your background in calculating complex impedances? Are you comfortable with the math?

https://en.wikipedia.org/wiki/Electrical_impedance#Complex_impedance

 

[Delta Prime]

https://www.biologic.net/topics/what-is-eis/

 

[Lord Jestocost]

I'm fairly new to electrochemical impedance spectroscopy (EIS). On some slides I was given, I have been provided with two circuits which would produce the same nyquist plot. I was wondering what real-world scenario these circuits would relate to. I know that the left-most resistor in each represents the resistance of the solution, but am unsure about the rest of each circuit. Any suggestions would be greatly appreciated, or resources which I can look at to get a better understanding.

“Electrochemical Impedance Spectroscopy ─ A Tutorial” by Alexandros Ch. Lazanas and Mamas I. Prodromidis (ACS Meas. Sci. Au 2023, 3, 162−193)

https://pubs.acs.org/doi/full/10.1021/acsmeasuresciau.2c00070