title: Suppressing the dissolution of polysulfides with cosolvent fluorinated diether towards high-performance lithium sulfur batteries.
abstract: The dissolution and shuttle of polysulfides in electrolytes cause severe anode corrosion, low coulombic efficiency, and a rapid fading of the capacity of lithium-sulfur batteries. Fluorinated diether (FDE) was selected as a cosolvent in traditional ether electrolytes to suppress the dissolution of polysulfides. The modified electrolytes lead to a negligible solubility of polysulfides, as well as decreased corrosion of the lithium anode. In an optimal system, the cells show improved cycling performance with an average coulombic efficiency of above 99% and a highly stable reversible discharge capacity of 701 mA h g-1after 200 cycles at a 0.5C rate. A combination of electrochemical studies and X-ray photoelectron spectroscopy demonstrates the sulfur reduction mechanism with three voltage plateaus.
authors.affiliation: CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China. zywen@mail.sic.ac.cn and National Center for Inorganic Mass Spectrometry in Shanghai, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China. qiangrong@mail.sic.ac.cn and Graduate School of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200050, P. R. China.
authors.forename: Sui
authors.initials: S
authors.lastname: Gu
authors.affiliation: National Center for Inorganic Mass Spectrometry in Shanghai, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China. qiangrong@mail.sic.ac.cn.
authors.forename: Rong
authors.initials: R
authors.lastname: Qian
authors.affiliation: CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China. zywen@mail.sic.ac.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Jin
authors.affiliation: CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China. zywen@mail.sic.ac.cn and Graduate School of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200050, P. R. China.
authors.forename: Qingsong
authors.initials: Q
authors.lastname: Wang
authors.affiliation: CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China. zywen@mail.sic.ac.cn and Graduate School of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200050, P. R. China.
authors.forename: Jing
authors.initials: J
authors.lastname: Guo
authors.affiliation: CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China. zywen@mail.sic.ac.cn and Graduate School of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200050, P. R. China.
authors.forename: Sanpei
authors.initials: S
authors.lastname: Zhang
authors.affiliation: National Center for Inorganic Mass Spectrometry in Shanghai, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China. qiangrong@mail.sic.ac.cn.
authors.forename: Shangjun
authors.initials: S
authors.lastname: Zhuo
authors.affiliation: CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China. zywen@mail.sic.ac.cn.
authors.forename: Zhaoyin
authors.initials: Z
authors.lastname: Wen