Operando Terahertz Spectroscopy of Solid Electrolyte Interphase Evolution on Silicon Anodes

Daniel Krotkov, Dan Schneier, Svetlana Menkin, Yonatan Horowitz, Emanuel Peled, Diana Golodnitsky*, Sharly Fleischer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The in-situ characterization of materials and interphases of battery electrodes is of crucial importance for the basic understanding of the complex, simultaneous processes that take place during the operation of secondary batteries. Here we present, for the first time, the use of a Terahertz (THz) time-domain-spectroscopy method for the operando characterization of the silicon/electrolyte interfacial phenomena and dynamics in a working lithium-ion battery. Strong correlation between the THz, XPS, and electrochemical data was established, allowing us to monitor the formation and evolution of the solid electrolyte interphase (SEI) during the reversible lithiation of the silicon anode.

Original languageEnglish
Article numbere202100183
JournalBatteries and Supercaps
Volume5
Issue number1
DOIs
StatePublished - Jan 2022

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