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 language | English (US) |
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Pages (from-to) | 4231-4235 |
Number of pages | 5 |
Journal | Angewandte Chemie - International Edition |
Volume | 55 |
Issue number | 13 |
DOIs | |
State | Published - Mar 18 2016 |
All Science Journal Classification (ASJC) codes
- Catalysis
- General Chemistry