Effect of organo-fluorine compounds on the thermal stability and electrochemical properties of electrolyte solutions for lithium ion batteries

► Reactivity of metallic Li with fluorine compounds is much lower than that of EC/DMC. ► Reactivity of LiC6 with fluorine compound-mixed electrolyte solutions containing LiPF6 is low. ► Oxidation currents in fluorine-compound-mixed solutions are smaller than those in original ones. ► First coulomic efficiencies are high in fluoro-ether-mixed electrolyte solutions.