What is impedance spectroscopy?

Impedance spectroscopy (IS) is a technique that measures the impedance of a system over a range of frequencies. It is commonly used in materials science, electrochemistry, and biology to characterize the electrical properties of materials and interfaces. By analyzing the impedance data, information about the system's resistance, capacitance, and inductance can be obtained, providing insights into its physical and chemical processes. In electrochemistry, it is often referred to as Electrochemical Impedance Spectroscopy (EIS) and is used to study electrode kinetics, corrosion, and the behavior of electrochemical devices.