On the use of drift correction for electrochemical impedance spectroscopy measurements

The effectiveness of drift correction is explored for measurement of electrochemical impedance spectra. Numerical simulations and experimental data for batteries and capacitors are used to show that drift correction cannot generate Kramers-Kronig consistent data for nonstationary systems. Application of drift correction improves, but does not fully recover, the original spectrum that is not corrupted by the drift. Drift correction improved the quality of spectra obtained for stationary systems under galvanostatic modulation, where the change from one frequency to another caused initial transients that corrupted the measurement.

Automated summary

The effectiveness of drift correction in measuring electrochemical impedance spectra is examined. Numerical simulations and experimental data on batteries and capacitors demonstrate that drift correction cannot generate Kramers-Kronig consistent data for nonstationary systems. While drift correction improves the quality of spectra obtained for stationary systems, it does not fully recover the original spectrum unaffected by drift.