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- Title
Functional Organosulfide Electrolyte Promotes an Alternate Reaction Pathway to Achieve High Performance in Lithium-Sulfur Batteries.
- Authors
Chen, Shuru; Dai, Fang; Gordin, Mikhail L.; Yu, Zhaoxin; Gao, Yue; Song, Jiangxuan; Wang, Donghai
- 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.
- Subjects
ORGANOSULFUR compounds; LITHIUM sulfur batteries; ELECTROLYTES; PERFORMANCE of storage batteries; POLYSULFIDES; OXIDATION-reduction reaction
- Publication
Angewandte Chemie, 2016, Vol 128, Issue 13, p4303
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201511830