Abstract
In chronopotentiometry, a current pulse is applied to the working electrode and its resulting potential is measured against a reference electrode as a function of time. At the moment when the current is first applied, the measured potential is abruptly changed due to the iR loss, and after that it gradually changes, because a concentration overpotential is developed as the concentration of the reactant is exhausted at the electrode surface. If the current is larger than the limiting current, the required flux for the current cannot be provided by the diffusion process and, therefore, the electrode potential rapidly rises until it reaches the electrode potential of the next available reaction, and so on.
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Pyun, SI., Shin, HC., Lee, JW., Go, JY. (2012). Electrochemical Methods. In: Electrochemistry of Insertion Materials for Hydrogen and Lithium. Monographs in Electrochemistry. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-29464-8_2
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DOI: https://doi.org/10.1007/978-3-642-29464-8_2
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