The obtained data from the potentiostat, which I use (Versastat 4, Princeton research applied), doesn't consider the area of the W.E., (see the sample of my result in the attached image).
What is the suitable action I should carry out for each parameter to consider the area of the W.E.?
In other words, Zre & Zim should I divide their values by the area of the W.E. or multiply them by area value, what about the other terms.
Thanks so much in advance
To calculate a.c. conductivity, you have to divide length (which is thickness for sandwich structure)by the impedance and area of cross section. In other word, you have to multiply your measured impedance by the area, then divide length by this product.
Thank you Dr. Kumar for your reply,but I don't understand the role of the length of the specimen, I have impedance data but the area was considered as 1 cm2, actually my W.E. area is 0.392 cm2,
How can I consider the change in the W.E.area on the obtained data?
Dear
The Cdl and Rct which you calculate are for the actual size of the specimen
If you take a rectangular specimen ignore the thickness - use only length and breath
Area of your Specimen is 0.392 cm2 and convert the data to i cm2
C dl is to multiplied by 1/ o.392
Electrode area 0.3cm2 has 300 Ohm; 1.0cm2 has 300*0.3= 100 Ohm cm2, i.e. less than 300 Ohm.
If your instrument has an area insertion option before the experiment, check if it works. If it works than your value should come normalized by itself. But you must confirm it first.
The Zre, Zim or |Z| should be multiplied by the area that is under immersion. That gives you the real value of Zre, Zre or |Z|. Phase constant is area independent.
Thank you So much for all who interest to give me a reply.
Thank you Dr. Vinod
Dear Yasser,
I go with prof. V.S.M answer it is the appropriate way to express the impedance data.
what is the exact way to normalised the EIS data per area. we should go Zre/area or Zimg/area ?
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