Electrical Impedance Spectroscopy with a Potentiostat

Electrochemical impedance spectroscopy (EIS) is a powerful technique that utilizes a small amplitude, alternating current (AC) signal to study the impedance characteristics of a cell. The AC signal is scanned over a wide range of frequencies to generate an impedance spectrum for the electrochemical cell. This impedance technique differs from direct current (DC) techniques as it allows the study of capacitive, inductive, and diffusion processes taking place inside the electrochemical cell.