Formation of High Impedance Interphases in Solid-State battery materials

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Mr. Or Levit, M.Sc. Candidate




All solid-state lithium ion batteries (ASS-LIBs) are considered an innovative, and a better alternative to contemporary lithium ion batteries. The narrow chemical stability window of solvent based, liquid phase electrolytes render lithium-metal batteries as a potential safety hazard and limit their applications.

In the past years, much progress has been made in terms of synthesis and development of new ceramic lithium-ion conductors. Oxides, sulfides and phosphates, among others, have been optimized to reach high lithium ion conductivities that are comparable to those commonly used in battery applications. However, the formation of thin films at the electrolyte/electrode interface mean that the integration of ASS-LIBs is hindered, due to high interfacial impedance that hinders the charge transfer.

This work applies electrochemical impedance spectroscopy (EIS) in order to identify and quantify the effects of such interphases on the electrical properties of lithium aluminum titanium phosphate (LATP) and lithium manganese oxide (LMO) interfaces.

Supervisor: Prof. Yair Ein-Eli

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