Mechanical Property Anisotropy Behavior Analysis of Inorganic Solid Electrolytes Used in All-Solid-State Li-Ion Batteries
Authors: Ke Xinyou , Yuan Chris 
Published: December 2020

All-solid-state Li-ion batteries (ASSLIBs) are now being intensively researched within the energy storage community as next-generation battery technologies1,2. In contrast to organic liquid electrolytes used in current Li-ion batteries, solid electrolytes used in ASSLIBs can exhibit a high safety performance, which means a much less possibility for the thermal runaway to occur3,4. In recent years, many studies have indicated that the mechanical property of solid electrolytes could play a significant role in affecting the cycling performance and longevity of ASSLIBs5-8. However, efforts on investigating the mechanical property of solid electrolytes are not sufficient to understand its characteristics and effects on battery performance. In this presentation, firstly we will introduce models used in analyzing the anisotropy behavior of mechanical properties of solid electrolytes with different crystal structures. Secondly, we will present our quantitative results on analyzing the spatial distributions of mechanical properties (including Bulk, shear and Young’s modulus) for several different types of inorganic solid electrolytes (including garnet, NASICON, Phosphate, Thio-phosphate and Argyrodite) used in ASSLIBs. Finally, we will provide suggestions on which type of inorganic solid electrolytes might be more beneficial to the ASSLIB performance with respect to the anisotropy of their mechanical properties.

Acknowledgements

This work was partially supported by the Leonard Case Jr. Endowment Fund and Case Western Reserve University.

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