Abstract:
An alternative interpretation of the impedance spectra of the LiPON solid electrolyte is proposed. It is suggested that the experimental value of conductivity is due to the absorption and displacement current, while the drift current is mainly shielded by the electrical double layer. The impedance of an alternative LiPON equivalent circuit containing a non-ideal absorption element is calculated. It is shown that the Bode diagrams of the alternative equivalent circuit well approximate the experimental curves, and the conductivity values are consistent with theoretical data and calculations based on the concentration and mobility of lithium ions.
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