Article
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Validity of LiPON Conductivity Determined by Impedance Spectroscopy
Version 1
: Received: 22 April 2024 / Approved: 23 April 2024 / Online: 23 April 2024 (09:47:23 CEST)
A peer-reviewed article of this Preprint also exists.
Rudy, A.; Novozhilova, A.; Egorova, J. Validity of LiPON Conductivity Determined by Impedance Spectroscopy. Batteries 2024, 10, 245. Rudy, A.; Novozhilova, A.; Egorova, J. Validity of LiPON Conductivity Determined by Impedance Spectroscopy. Batteries 2024, 10, 245.
Abstract
A hypothesis that the generally accepted value of the LiPON conductivity should be attributed to the absorption and displacement currents is substantiated. The reason is a small contribution of the drift current due to field screening by the electric double layer. The basis for this assumption is the measurement of the LiPON absorption capacitance, according to which its dielectric constant is about 106. An alternative equivalent circuit containing a non-ideal absorption element is proposed and its impedance is calculated. It is shown that the Bode diagrams of the alternative circuit well approximate the experimental curves. Parameters and the magnitude of electric field screening are calculated basing on proposed model of a double electric layer. Considering the screening effect, the drift conductivity of LiPON is obtained, which value is in good agreement with the data on lithium concentration and mobility.
Keywords
solid electrolyte; impedance spectroscopy; absorption current; electric double layer; Debye length; drift conductivity
Subject
Chemistry and Materials Science, Electrochemistry
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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