Dear collegeus,

i did measure a porous electrode with potentiostatic impedance spectroscopy. I got a result with a significant semi-circle at high frequencys and a 45°-element at low frequencys, as expected.

What was not expected is the behaviour over 800 kHz. The real part of the impedance Z' increases with the frequency. I did search for an explanation for it but could find something.

Has anyone a suggestion what to look at? Please dont exclude anything, like problems with the cables to connect or anything in the experimental set-up you might come up with.

Thank you for your attention.

Sascha

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