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

Journal Article · 16 December 2019 · Journal of Physical Chemistry Letters

DOI: https://doi.org/10.1021/acs.jpclett.9b03284 · OSTI ID:1592392

Ha, Yeyoung  ^[1]; Tremolet de Villers, Bertrand J.  ^[1]; Li, Zhifei  ^[1]; Xu, Yun  ^[1]; Stradins, Paul ^[1]; Zakutayev, Andriy  ^[1]; Burrell, Anthony ^[1]; Han, Sang-Don  ^[1]

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1. National Renewable Energy Lab. (NREL), Golden, CO (United States). Materials and Chemical Science and Technology Directorate

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. We report 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.

• Research Organization: National Renewable Energy Laboratory (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
• Grant/Contract Number: AC36-08GO28308
• OSTI ID: 1592392
• Report Number(s): NREL/JA--5900-75341
• Journal Information: Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Journal Issue: 1 Vol. 11; ISSN 1948-7185
• Publisher: American Chemical SocietyCopyright Statement
• Country of Publication: United States
• Language: English