Date of Original Version
Tin (Sn) nanoparticle electrodes have been prepared and battery cycling performance has been investigated with 1.2 M LiPF6 in ethylene carbonate (EC) / diethyl carbonate (DEC) electrolyte (1:1, w/w) with and without added vinylene carbonate (VC) or fluoroethylene carbonate (FEC). Incorporation of either VC or FEC improves the capacity retention of Sn nanoparticle electrodes although incorporation of VC also results in a significant increase in cell impedance. The best electrochemical performance was observed with electrolyte containing 10% of added FEC. In order to develop a better understanding of the role of the electrolyte in capacity retention and solid electrolyte interface (SEI) structure, ex-situ surface analysis has been performed on cycled electrodes with infrared (IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and Hard XPS (HAXPES). The ex-situ analysis reveals a correlation between electrochemical performance, electrolyte composition, and SEI structure.
Seo, D. M., Nguyen, C. C., Young, B. T., Heskett, D. R., Woicik, J. C., & Lucht, B. L. (2015). Characterizing Solid Electrolyte Interphase on Sn Anode in Lithium Ion Battery. J. Electrochem. Soc., 162(13), A7091-7095. doi: 10.1149/2.0121513jes
Available at: http://dx.doi.org/10.1149/2.0121513jes
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.