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- Title
The Radical Pathway Based on a Lithium‐Metal‐Compatible High‐Dielectric Electrolyte for Lithium–Sulfur Batteries.
- Authors
Zhang, Ge; Peng, Hong‐Jie; Zhao, Chen‐Zi; Chen, Xiang; Zhao, Li‐Da; Li, Peng; Huang, Jia‐Qi; Zhang, Qiang
- Abstract
High‐dielectric solvents were explored for enhancing the sulfur utilization in lithium–sulfur (Li−S) batteries, but their applications have been impeded by low stability at the lithium metal anode. Now a radical‐directed, lithium‐compatible, and strongly polysulfide‐solvating high‐dielectric electrolyte based on tetramethylurea is presented. Over 200 hours of cycling was realized in Li|Li symmetric cells, showing good compatibility of the tetramethylurea‐based electrolyte with lithium metal. The high solubility of short‐chain polysulfides, as well as the presence of active S3.− radicals, enabled pouch cells to deliver a discharge capacity of 1524 mAh g−1 and an energy density of 324 Wh kg−1. This finding suggests an alternative recipe to ether‐based electrolytes for Li−S batteries.
- Subjects
LITHIUM sulfur batteries; POLYSULFIDES; RADICALS (Chemistry); ELECTROLYTES; ENERGY density
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 51, p16974
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201810132