Characterization of electrolytic cells is often inferred from measurements of their electrical properties as a function of frequency by applying a sinusoidal voltage. In some cases, a dc bias is intrinsically present in addition to the ac stimulus and its effects are often neglected although they may become relevant in certain situations. As a consequence, the interpretation of the observed results might be misleading. Our aim is to estimate the influence of the bias solving numerically the Poisson-Nernst-Planck model for an electrolytic cell submitted to an ac external voltage superimposed to a bias. According to our analysis, even in the case of a small bias, the estimated Debye frequency and the low-frequency resistance of the cell are significantly influenced by it.
Effects of a dc bias on electrical impedance spectroscopy in electrolytic cells / Barbero, G.; Gliozzi, A. S.; Scalerandi, M.; Scarfone, A. M.. - In: JOURNAL OF MOLECULAR LIQUIDS. - ISSN 0167-7322. - STAMPA. - 272:(2018), pp. 565-571. [10.1016/j.molliq.2018.09.050]
Effects of a dc bias on electrical impedance spectroscopy in electrolytic cells
Barbero, G.;Gliozzi, A. S.;Scalerandi, M.;Scarfone, A. M.
2018
Abstract
Characterization of electrolytic cells is often inferred from measurements of their electrical properties as a function of frequency by applying a sinusoidal voltage. In some cases, a dc bias is intrinsically present in addition to the ac stimulus and its effects are often neglected although they may become relevant in certain situations. As a consequence, the interpretation of the observed results might be misleading. Our aim is to estimate the influence of the bias solving numerically the Poisson-Nernst-Planck model for an electrolytic cell submitted to an ac external voltage superimposed to a bias. According to our analysis, even in the case of a small bias, the estimated Debye frequency and the low-frequency resistance of the cell are significantly influenced by it.Pubblicazioni consigliate
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https://hdl.handle.net/11583/2714197
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