Impedance of a Silver Electrode Reversible with Respect to Minor Carriers in a Solid Sulfate Electrolyte or an Ionic Melt in the Galvanodynamic Mode

The behavior of a silver electrode, which is reversible with respect to minority carriers, in a sulfate solid electrolyte or the corresponding ionic melt is studied in the galvanodynamic mode using Laplace transform of Ohm’s law on the interaction between current, potential, and impedance, which is...

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Veröffentlicht in:Russian metallurgy Metally 2021-02, Vol.2021 (2), p.137-140
Hauptverfasser: Guseinov, R. M., Radzhabov, R. A., Magomedova, U. M.
Format: Artikel
Sprache:eng
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Zusammenfassung:The behavior of a silver electrode, which is reversible with respect to minority carriers, in a sulfate solid electrolyte or the corresponding ionic melt is studied in the galvanodynamic mode using Laplace transform of Ohm’s law on the interaction between current, potential, and impedance, which is called the operational impedance method in electrochemistry and electrical engineering. In addition to the operator impedance method, we also use an equivalent electrical circuit of a silver electrode, which is reversible with respect to oxygen and minority carriers (i.e., oxygen ions). The possibility of using equivalent electrical circuits in studying the relaxation processes in solid electrolytes was shown in 1973 [9, 10]. An analytical expression is obtained for the time dependence of the potential of the electrode–solid electrolyte (or corresponding ionic melt) interface in the galvanodynamic mode of operation of an electrochemical cell. As shown by a graphical–analytical analysis, the galvanodynamic time dependence of the interface potential is an exponential function. The difference between a silver electrode in sulfate electrolytes and the classical equivalent Erschler–Randles electrical circuit is shown to consist in the fact that the silver electrode performs another function, namely, an oxygen function, at very low silver ion concentrations.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029521020087