Flame-retardant co-solvent incorporation into lithium-ion coin cells with Si-nanoparticle anodes
Date of Original Version
The cycling performance of Si-nanoparticle/Li cells with different electrolytes has been investigated. Cells containing standard binary LiPF6/ethylene carbonate/ethyl methyl carbonate electrolytes have poor capacity retention (46 %) after 50 cycles. Cells cycled with fluoroethylene carbonate (FEC)-based electrolyte have much better capacity retention (74 %). The effect of incorporation of flame-retardant co-solvents triphenyl phosphate and dimethyl methylphosphonate was investigated with both the standard and FEC electrolytes. The incorporation of the FR co-solvents did not significantly alter the performance of either electrolyte. Ex situ analysis via scanning electron microscopy, attenuated total reflectance infrared spectroscopy, and X-ray photoelectron spectroscopy was conducted to gain a better understanding of the role of electrolyte in solid electrolyte interphase structure and stability.
Publication Title, e.g., Journal
Journal of Applied Electrochemistry
Dunn, Ronald P., Cao Cuong Nguyen, and Brett L. Lucht. "Flame-retardant co-solvent incorporation into lithium-ion coin cells with Si-nanoparticle anodes." Journal of Applied Electrochemistry 45, 8 (2015): 873-880. doi: 10.1007/s10800-015-0856-6.