Mechanistic modeling of the dielectric impedance of layered membrane architectures

摘要: Abstract Electrochemical impedance spectroscopy (EIS) is frequently used to investigate properties of layered membrane systems in aqueous electrolyte solutions. However, attributing features the underlying plots chemical or structural characteristics system difficult, as it usually requires assumption elements an analogous equivalent electrical circuit. Furthermore, some parameters are not easily accessible experimental studies, making analysis EIS subject interpretation rather than rigorous understanding. We address these difficulties by conducting direct numerical simulations structures composed solutions, ion exchange membranes and modification layers, using our EnPEn framework. By changing model, possible isolate spectra they relate different layers interfaces. For first time, we show general influence thickness charge density surface on complex such architectures multi-ionic mixtures. The results can be characterize understand gained experiments. This important increasingly with multiple Understanding design performance a for wide range applications, selective electrodes, desalination deionization. dynamic framework closes gap between uncertainty introduced assuming circuits.