Functional Organosulfide Electrolyte Promotes an Alternate Reaction Pathway to Achieve High Performance in Lithium-Sulfur Batteries

Shuru Chen, Fang Dai, Mikhail L. Gordin, Zhaoxin Yu, Yue Gao, Jiangxuan Song, Donghai Wang

Research output: Contribution to journalArticle

87 Scopus citations

Abstract

Lithium-sulfur (Li-S) batteries have recently received great attention because they promise to provide energy density far beyond current lithium ion batteries. Typically, Li-S batteries operate by conversion of sulfur to reversibly form different soluble lithium polysulfide intermediates and insoluble lithium sulfides through multistep redox reactions. Herein, we report a functional electrolyte system incorporating dimethyl disulfide as a co-solvent that enables a new electrochemical reduction pathway for sulfur cathodes. This pathway uses soluble dimethyl polysulfides and lithium organosulfides as intermediates and products, which can boost cell capacity and lead to improved discharge-charge reversibility and cycling performance of sulfur cathodes. This electrolyte system can potentially enable Li-S batteries to achieve high energy density.

Original languageEnglish (US)
Pages (from-to)4231-4235
Number of pages5
JournalAngewandte Chemie - International Edition
Volume55
Issue number13
DOIs
StatePublished - Mar 18 2016

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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