Long-cycle-life lithium-sulfur batteries with lithium solvate ionic liquids

Shiro Seki, Nobuyuki Serizawa, Katsuhito Takei, Yasuhiro Umebayashi, Seiji Tsuzuki, Masayoshi Watanabe

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The electrochemical properties of a sulfur positive electrode in equimolar glyme-Li salt mixtures were investigated. Cyclic voltammograms indicated that the insertion of Li into the sulfur/carbon composite electrode took place over at least three steps during the reduction process. In contrast, the broad anodic current suggested that the electrode kinetics for the extraction of Li were relatively slow. Stable charge-discharge operation of the Li-S cell consisting of a Li negative electrode with [Li(triglyme)][bis(trifluoromethanesulfonyl)amide] as the electrolyte was achieved at 800 cycles. This indicates that dissolution of Li2Sx into the electrolyte was effectively suppressed in this system.

Original languageEnglish
Pages (from-to)680-682
Number of pages3
JournalElectrochemistry
Volume85
Issue number10
DOIs
Publication statusPublished - 2017
Externally publishedYes

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Keywords

  • Battery Performance
  • Lithium Solvate Ionic Liquid
  • Lithium-sulfur Battery

ASJC Scopus subject areas

  • Electrochemistry

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