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Effect of Fluoroethylene Carbonate (FEC) on the Performance and Surface Chemistry of Si-Nanowire Li-Ion Battery Anodes

Etacheri, Vinodkumar, Haik, Ortal, Goffer, Yossi, Roberts, Gregory A., Stefan, Ionel C., Fasching, Rainier, Aurbach, Doron·2012·Langmuir

Abstract

The effect of FEC as a co-solvent on the electrochemical performance and surface chemistry of silicon nanowire (SiNW) anodes was thoroughly investigated. Enhanced electrochemical performance was observed for SiNW anodes in alkyl carbonates electrolyte solutions containing fluoroethylene carbonate (FEC). Reduced irreversible capacity losses accompanied by enhanced and stable reversible capacities over prolonged cycling were achieved with FEC-containing electrolyte solutions. TEM studies provided evidence for the complete and incomplete lithiation of SiNW's in FEC-containing and FEC-free electrolyte solutions, respectively. Scanning electron microscopy (SEM) results proved the formation of much thinner and compact surface films on SiNW's in FEC-containing solutions. However, thicker surface films were identified for SiNW electrodes cycled in FEC-free solutions. SiNW electrodes develop lower impedance in electrolyte solutions containing FEC in contrast to standard (FEC-free) solutions. The surface chemistry of SiNW electrodes cycled in FEC-modified and standard electrolytes were investigated using X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectroscopy. The impact of FEC as a co-solvent on the electrochemical behavior of SiNW electrodes is discussed herein in light of the spectroscopic and microscopic studies.

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Metadata

Authors
Etacheri, V., Haik, O., Goffer, Y., Roberts, G. A., Stefan, I. C., Fasching, R., & Aurbach, D.
Venue
Langmuir
Published
2011-12-06
Volume
28
Issue
1
Pages
965-976
ISSN
  • 0743-7463 (ISSN-L)
  • 1520-5827
OpenAlex
W2067584365
Cited by
817
References
2
FWCI
26.07
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Effect of Fluoroethylene Carbonate (FEC) on the Performance and Surface Chemistry of Si-Nanowire Li-Ion Battery Anodes. https://app.cochat.ai/papers/10.1021/la203712s
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Etacheri, V., Haik, O., Goffer, Y., Roberts, G. A., Stefan, I. C., Fasching, R., & Aurbach, D. (2012). Effect of Fluoroethylene Carbonate (FEC) on the Performance and Surface Chemistry of Si-Nanowire Li-Ion Battery Anodes. Langmuir. https://doi.org/10.1021/la203712s

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