10.626 Lecture Notes, Impedance of electrodes
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چکیده
In the previous lecture, we leant about impedance spectroscopy. Electrochemical impedance spectroscopy is the technique where the cell or electrode impedance is platted versus frequency. Thus, the impedance is measured as a function of the frequency of the AC source. Electrochemical impedance spectroscopy is a useful method for investigating porous electrodes, which are extensively used in the field of batteries, fuel cells, and electrochemical capacitors. With the impedance spectroscopy analysis, we can characterize various electrodes in terms of AC frequency and model the equivalent RC circuits. In this lecture, we start with flat electrodes shown to Figure 6.1 to learn how the impedance spectroscopy can be applied to the analysis of electrodes.
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