title: Fluoroethylene carbonate as an important component in electrolyte solutions for high-voltage lithium batteries: role of surface chemistry on the cathode.
abstract: The effect of fluorinated ethylene carbonate (FEC) as a cosolvent in alkyl carbonates/LiPF6 on the cycling performance of high-voltage (5 V) cathodes for Li-ion batteries was investigated using electrochemical tools, X-ray photoelectron spectroscopy (XPS), and high-resolution scanning electron microscopy (HRSEM). An excellent cycling stability of LiCoPO4/Li, LiNi0.5Mn1.5O4/Si, and LiCoPO4/Si cells and a reasonable cycling of LiCoPO4/Si cells was achieved by replacing the commonly used cosolvent ethylene carbonate (EC) by FEC in electrolyte solutions for high-voltage Li-ion batteries. The roles of FEC in the improvement of the cycling performance of high-voltage Li-ion cells and of surface chemistry on the cathode are discussed.
authors.affiliation: Department of Chemistry Bar-Ilan University , Ramat Gan 52900 Israel.
authors.forename: Elena
authors.initials: E
authors.lastname: Markevich
authors.forename: Gregory
authors.initials: G
authors.lastname: Salitra
authors.forename: Katia
authors.initials: K
authors.lastname: Fridman
authors.forename: Ronit
authors.initials: R
authors.lastname: Sharabi
authors.forename: Gregory
authors.initials: G
authors.lastname: Gershinsky
authors.forename: Arnd
authors.initials: A
authors.lastname: Garsuch
authors.forename: Guenter
authors.initials: G
authors.lastname: Semrau
authors.forename: Michael A
authors.initials: MA
authors.lastname: Schmidt
authors.forename: Doron
authors.initials: D
authors.lastname: Aurbach