Overview
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Read the articleAUTHORS
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Xin WANG : Postdoctoral Researcher, Marie and Louis Pasteur University, UTBM, CNRS, FEMTO-ST Institute, FCLAB, Belfort, France
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Zhongliang LI : Junior Professor, Marie and Louis Pasteur University, UTBM, CNRS, FEMTO-ST Institute, FCLAB, Belfort, France
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Zhixue ZHENG : Assistant Professor, Marie and Louis Pasteur University, UTBM, CNRS, FEMTO-ST Institute, FCLAB, Belfort, France
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Daniel HISSEL : Full Professor, Marie and Louis Pasteur University, UTBM, CNRS, FEMTO-ST Institute, FCLAB, Belfort, France, and Chair in Innovation, Institut Universitaire de France, Paris, France
INTRODUCTION
Electrochemical impedance spectroscopy (EIS) can reveal the internal physical processes of a system. For this reason, it has become a powerful diagnostic and characterization technique for electrochemical energy conversion and storage devices, including hydrogen systems , batteries , and photovoltaic (PV) systems . By applying small electrical disturbances and analyzing the voltage-current response over a predefined frequency range, one can obtain the system’s EIS, which provides relevant information about these internal dynamic processes. In combination with the analysis of the distribution of relaxation times (DRT), or with equivalent electrical circuit models, the SIE can be used, within a given methodological framework, to distinguish and characterize various physical and electrochemical processes occurring in parallel or in series within the system.
This information provides a valuable basis for characterizing the health status of the system under study, potentially in real time. However, it should be emphasized that this ability to separate processes depends heavily on a sufficient distinction between the characteristic time scales of the processes under consideration. The information accessible via EIS is fundamentally derived from the system’s...
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KEYWORDS
Electrochemical impedance spectroscopy | low-cost implementation | electrochemical devices characterization
CAN BE ALSO FOUND IN:
Low-cost impedance spectrometer for characterizing electrochemical devices
Principles and applications of EIS
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