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 language | American English |
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Pages (from-to) | 286-291 |
Number of pages | 6 |
Journal | Journal of Physical Chemistry Letters |
Volume | 11 |
Issue number | 1 |
DOIs | |
State | Published - 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