How can I find the equivalent circuit of EIS spectra? I have run some Nyquist plots but I could not find the equivalent circuit or any given procedure for find out this circuit...so How we should find out this?
And does it change when considering the EDLC type or Pseudocapacitor type?
After getting the Nyquist plots, then follow these procedures
1. open the EC- lab software
2.open the Nyquist plot you wanted to get its equivalent circuit
3.select the point graph
4.click analysis on the EC-Lab, and select electrochemical impedance spectroscopy, then Z fit.
5. from there, you can see many types of equivalent circuit, you select one type and click calculate.
6. scroll down and select: method: "randomise and simplex" ; stop randomise iteration: "input the value like 60,000"; "stop fit on: input the value also.
7.select min
8. if the select equivalent circuit is the correct one, then the standard deviation should be less one and x2 value should be 3*10-3
8. if the selected equivalent circuit does not fit with your data, then standard deviation will not be close to one likewise the x2 value
9.then select another equivalent circuit and try again as before.
8. the select equivalent circuit is the correct one, then the deviation should be less one and x2 value should 3*10-3
Dear Mustapha,
Thank you for the valuable information, but I need to know does that EC-Lab software is analysed date only from EC-lab machine or does the data that collect from other potentiostats also able to analyse from this EC lab software?
And can you send me the proper link about that software?
Thank you
yes..you can do the analysis with the data from other potentiostats. what you need to do is to install EC-Lab on your computer.
https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwj_wO7m5YDRAhVFwI8KHVl-AqcQFgg4MAM&url=http%3A%2F%2Fwww.bio-logic.info%2Felectrochemistry-ec-lab%2Fdownloads%2Fsoftware-upgrade-help%2Fec-lab-software%2F&usg=AFQjCNE3r2cBI_n8NqLZe9CMbEEn23jQ0g&bvm=bv.142059868,d.c2I
I was very interested in Dr Idris answer - things have developed a lot since I tried to perform EIS on dye sensitised cells 15 years ago. But don't forget that in some of the equivalent circuits you will have things like Warburg impedances which are NOT easily modelled on any electronic circuit simulator. It depends on what you need the equivalent circuit for.
can you please provide me with the software dr. idris, due to the link is expired
thank you very much
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Semiconductor