Impedance modelling of two-phase solid-state ionic conductors. Part II-application to high-lithium-content xLi_2O-B_2O_3 fast-ion conducting glasses

摘要

The equivalent circuit model of two-phase ionic conductors, introduced in Part I of this work, was applied to a set of xLi_2O-B_2O_3 fast-ion conducting glasses, with x ranging from 3.0 to 4.5. The shape of Arrhenius plots, constructed by equivalent circuit fitting of impedance spectra measured at various temperatures, turned out to be in agreement with the predictions of the model. The analysis procedure, which was developed by mathematical investigation in accordance with the implications of the model, was employed to determine the activation energies of the two present phases and the total DC ionic resistivity of the examined glasses.