Fluorinated electrolytes for Li-S battery: Suppressing the self-discharge with an electrolyte containing fluoroether solvent

Nasim Azimi, Zheng Xue, Nancy Dietz Rago, Christos Takoudis, Mikhail L. Gordin, Jiangxuan Song, Donghai Wang, Zhengcheng Zhang

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

The fluorinated electrolyte containing a fluoroether 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) was investigated as a new electrolyte for lithium-sulfur (Li-S) batteries. The low solubility of lithium polysulfides (LiPS) in the fluorinated electrolyte reduced the parasitic reactions with Li anode and mitigated the self-discharge by limiting their diffusion from the cathode to the anode. The use of fluorinated ether as a co-solvent and LiNO3 as an additive in the electrolyte shows synergetic effect in suppressing the self-discharge of Li-S battery due to the formation of the solid electrolyte interphase (SEI) on both sulfur cathode and the lithium anode. The Li-S cell with the fluorinated electrolyte showed prolonged shelf life at fully charged state.

Original languageEnglish (US)
Pages (from-to)A64-A68
JournalJournal of the Electrochemical Society
Volume162
Issue number1
DOIs
StatePublished - 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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