While performing the Electrochemical Impedance spectroscopy how we can choose the frequency range? It should be broad range or narrow?
Typically, you choose a broad frequency range for EIS but of course it depends on your measurement. This might also be interesting for you https://www.researchgate.net/post/What-frequency-ranges-to-use-during-electrochemical-impedance-spectroscopy-EIS
André Marianovich Thanks for your suggestion Sir. Can you please show some light in the case of electrochemical energy storage systems
(mainly Supercapacitors).
Could you please explain this by taking an example for screen printed carbon electrodes
A widespread frequency range (say: 1mHz-1MHz) sweeping, warrants, commonly, an (all-inclusive) union of spectrum/a analysis for such (complex) cells[1,2].
1. Metal/Metal Oxide Nanoparticles-Composited Porous Carbon for High-Performance Supercapacitors https://www.sciencedirect.com/science/article/pii/S2352152X21002280
2. Knitted and screen printed carbon-fiber supercapacitors for applications in wearable electronics https://pubs.rsc.org/en/content/articlelanding/2013/ee/c3ee40515j#!divAbstract
It entirely depends on your measurements, e.g., if you are interested in the impedance of the electrolyte, MHz to Hz regime should be fine.
On the other hand, you may need to go to lower frequencies (mHz, for example).
In a nutshell, measuring in a wide frequency range is always a good idea; you can decide later on the interpretation range.
What is the general frequency range for
1) glassy carbon electrode
2) screen printed carbon electrode
3) FTO coated glass electrode
I am so sorry, I can not answer your question because it is not my expert, thanks
all parameters (frequency range, amplitude, standard resistance, g-stat or p-stat modes, etc.) at performing impedance measurements are selected based on the objects of research and the organization of the setup. But as was stated above, it is most reasonable to carry out EIS measurements in the widest possible range of frequencies that the measuring device is capable of.
Dear Arun Kumar
The frequency range of interest in electrochemical impedance spectroscopy depends on the specific application. It can be either broad band or narrow band. The upper limit of the interested frequency range can be up to a few GHz, and the lower limit can be close to DC.
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