I want to characterize Supercapacitor. So do we able to use Impedence analyser insted of Electrochemical Impedence spectroscopy?
In electrochemical impedance spectroscopy you are mainly dealing with cole-cole plot(Z'and Z'') with frequency, but with impedance analyzer also you can extract the same data ,taking care of the proper dimensions of your sample and also the proper calibration of short and load .
We have both Galvanic EIS and Potentiostatic EIS. could you know which technique shows more similerity with the impedence analyser?
Dear Yasun Kannangara,
if your EIS system supports also a VDC polarization, then take a series of Z spectra (fLow
Dear Yasun,
I also see no difference. For some "technical/electronics" people, IS and EIS are basically the same, the "EIS" is possibly just including the electrochemical reaction, hence the E in EIS. The electrochemical reaction take place "outside" of the instrument, so the IS spectrometer is the same.
Methods for plotting/representation of the data are secondary, whether it is cole-cole or nyquist, the spectra is still the same.
Also, galvanostatic or potentiostatic (although the names seem wrong, there is no "static", you have to periodically vary these to see impedance) IS are basically the same, impedance is a physical quantity by definition, for some processes it is better to do it with varying "U" or "j". Sometimes for large cells, with even a small U you can get huge currents, so maybe it would be better to use current perturbation and measure the voltage.
Best regards,
Sebastian
If we study a simple and linear system then I see no difference, also.
Besides of testing your equipment with a simple electrochemical system (see above) check your reference electrode, it should have a low impedance (
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