Dear Frederik-Lesniewski,

EIS-measurements[1,2] share, nearly, the same constrains as the quasi-DC-measurements, as well as the, more widely known, traditional, DC-measurements[3].

Specify, please, what are your own specific material's/device's (electrical resistivity) constrains related with (or constrained by) the EIS-measurements[4] e.g. due to either your EIS-setup (specs[4]), or even your cell's constraints ?

1. Conductivity (electrolytic) https://en.wikipedia.org/wiki/Conductivity_electrolytic

2. How to measure conductivity and which type of conductivity sensor to choose https://visaya.solutions/en/article/how-to-measure-conductivity

3. Electrical resistivity and conductivity https://en.wikipedia.org/wiki/Electrical_resistivity_and_conductivity

4. Two or four electrodes EIS-measurements ?

Ioannis Samaras Thank you for your answer and for providing respective sources. I will take a closer look at constraints and experiment setup and write them here soon.

To answer your question, information about your materials, the type and organization of the cell, and your equipment are needed. But, in theory, with good equipment and correct current collection, the area should not greatly affect

Thank you all for your answers.

Since I still owe an answer regarding experiment setup and resulting constraints, here's more info on that. Ioannis Samaras

I'm performing potentiostatic experiments using a Gamry Instruments 1000E Interface. The setup of electrodes is of 4-terminal type in a chamber similar to the one presented in this paper:

Conference Paper Designing electrodes for electrical impedance spectroscopy i...

I am applying a sinusoidal AC voltage of 14 mV rms over a frequency range from 1Hz to 1 MHz. As electrolyte I am using a standard conductivity solution of 12880 uS/cm. Electrodes are of size 8mm x 8mm.

Dear Frederik Lesniewski ,

all is fine with the electrode's (size effects, and the) area in this[1] paper, and your cell.

However, there is another kind of implications, as a side effect. There is an issue[2] about the choice of the 'harsh' materials[3], used in this[1] paper, for the 4-terminals[1,3].

Try to replace the materials (terminals of stainless steel) by Pt - terminals/electrodes, or even by a lower cost Pt-coated (having a high thickness>10um) electrodes.

A hint: If there is an enormous cost issue, then replace only[4] the 2-more critical (small, middle) terminals, e.g. the RE and WS electrodes.

1. Conference Paper Designing electrodes for electrical impedance spectroscopy i...

2. A major issue for low freq.

What about the case of screen-printed electrodes? Is the electrochemical area important? Is the ratio between WE and RE or WE or CE important? Are their any studies which can be considered as reference?

Marius Olariu That's a point I was thinking about, too. And now I'm working on it ;) I'm not doing experiments with screen printed but with inkjet-printed electrodes. What I found in EIS so far, with the chamber design I have mentionned before, is a different (and frequency wise slightly shifted) phase behaviour than for V4A-electrodes (closer to 0 degrees). Since I am currently working on this project, results are not final, but I'll let you know when I'm done :)

Frederik Lesniewski Thank you a lot for your comment! Looking forward for further updates!!!

What is the type (please, show: a link for commercial or a draft photo) of your screen-printed electrode(s), dear Marius Olariu ?

They are not commercial....we are manufacturing them in-house from mask manufacturing to printing!!!