Fast Electrochemical Impedance Spectroscopy

Abstract

The conventional EIS approach utilises a sinusoidal waveform as an excitation signal (i.e., single-sine approach). Despite the simplicity of the excitation and the signal processing step, performing EIS with such an approach is inefficient. This chapter presents an approach based on DRBS as an excitation signal and CWT with Morlet mother wavelet as a signal processing tool. The main advantage of using DRBS as excitation compared to the conventional one, is shorter probing time. Furthermore, with properly tuned parameters, CWT provides optimal time-frequency resolution.