Probing the Evolution of Surface Chemistry at the Silicon-Electrolyte Interphase via In Situ Surface-Enhanced Raman Spectroscopy

Sang Don Han, Yeyoung Ha, Bertrand Tremolet de Villers, Zhifei Li, Pauls Stradins, Andriy Zakutayev, Anthony Burrell, Yun Xu

Research output: Contribution to journalArticlepeer-review

25 Scopus Citations

Abstract

We present a novel spectroscopic technique for in situ Raman microscopy studies of battery electrodes. By creating nanostructures on a copper mesh current collector, we were able to utilize surface-enhanced Raman spectroscopy (SERS) to monitor the evolution of the silicon anode-electrolyte interphase. The spectra show reversible Si peak intensity changes upon lithiation and delithiation. Moreover, an alkyl carboxylate species, lithium propionate, was detected as a significant SiEI component. Our experimental setup showed reproducible and stable performance over multiple cycles in terms of both electrochemistry and spectroscopy.

Original languageAmerican English
Pages (from-to)286-291
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume11
Issue number1
DOIs
StatePublished - 2 Jan 2020

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

NREL Publication Number

  • NREL/JA-5900-75341

Keywords

  • alkyl carboxylates
  • in-situ surface-enhanced Raman spectroscopy
  • reversible evolution of silicon
  • SERS
  • SiEI
  • silicon-electrolyte interphase

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