Date of Original Version
Methylene ethylene carbonate (MEC) has been investigated as an alternative additive to fluoroethylene carbonate (FEC) for Si nanoparticle anodes cycled with 1.2 M LiPF6/ethylene carbonate (EC): diethyl carbonate (DEC) (1:1, w/w) electrolyte. The Si electrodes cycled with 10% MEC-added electrolyte exhibit significantly improved capacity retention after 100 cycles compared to standard electrolyte (73% vs 46%). In addition, the Si electrode cycled with MEC additive has less damage from cracking than the standard electrolyte. Ex situ surface analyses via infrared and X-ray photoelectron spectroscopy reveal a solid electrolyte interphase (SEI) containing a high concentration of a poly(MEC), which is likely responsible for the improved performance of Si anodes.
Nguyen, C. C., & Lucht, B. L. (2016). Improved cycling performance of Si nanoparticle anodes via incorporation of methylene ethylene carbonate. Electrochemistry Communications, 66, 71-74. doi: 10.1016/j.elecom.2016.03.005
Available at: https://doi.org/10.1016/j.elecom.2016.03.005
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