期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 14, 页码 6725-6733出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta01057e
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资金
- Daimler AG/Mercedes-Benz Research & Development North America, Inc.
- Argonne, a U.S. Department of Energy [DE-AC02-06CH11357]
A high performance lithium-sulfur (Li-S) battery comprising a symmetric fluorinated diethoxyethane electrolyte coupled with a fish-scale porous carbon/S composite electrode was demonstrated. 1,2-Bis(1,1,2,2-tetrafluoroethoxy) ethane (TFEE) was first studied as a new electrolyte solvent for Li-S chemistry. When co-mixed with 1,3-dioxolane (DOL), the DOL/TFEE electrolyte suppressed the polysulfide dissolution and shuttling reaction. When coupled with a fish-scale porous carbon/S composite electrode, the Li-S cell exhibited a significantly high capacity retention of 99.5% per cycle for 100 cycles, which is far superior to the reported numerous systems.
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