Hi everyone, how can I complete the semicircle arc in EIS test?

[ِAbeer Farouk Abbas Al-Attar]

Hi everyone, how can I complete the semicircle arc from the EIS test?

I try to upload pics. here but I don't have permission I think I worked with ZSimpWin software.

Thanks 

[Eugene Engmann]

Hi Abeer,

A Resistor, in series with a  parallel combination of a capacitor/constant phase element and a resistor should help you model the semicircle. The first resistor represents the electrolyte resistance, and the parallel combination of the capacitor/ constant phase element and resistor represents a time constant.

Hope this helps.

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[Yevgen Barsukov]

Try to send message with  pictures over web interface:

https://groups.google.com/forum/#!forum/impedance-spectroscopy 

There is no separate permission for pictures, so if you can post, you can also add attachments. 

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[gyirga]

Hi Abeer, 
if you have picture it would be good. However, as far as my understanding your concern is the semicircle is not a complete semicircle. if this is your problem,  it might be because of two reasons;

1. it seems that your  end frequency scan range is not enough ( like try down to  1mHZ or 0.5mHz). 

2. if number 1 doesn't help, the charge transfer process is not good in your system. So, describe the result accordingly 

i hope it helps. 

Solomon.

[Yevgen Barsukov]

Adding the pictures you forwarded to me in case you still can not upload...

Btw you have to use "Attach a file" link, on the left upper side of the new message window.