Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 17, Pages 15542-15549Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am504345s
Keywords
lithium-sulfur batteries; lithium anode; electrolyte; LIODFB; passivation layer; electrochemistry
Funding
- National Science Foundation of China [21373028]
- National 863 Program [2011AA11A256]
- New Century Educational Talents Plan of Chinese Education Ministry [NCET-12-0050]
- Beijing Novel Program [Z121103002512029]
- Ford University Research Program (URP) project
- U.S. Department of Energy from Vehicle Technologies Office, Department of Energy, Office of Energy Efficiency and Renewable Energy (EERE) [DE-AC0206CH11357]
- U.S. Department of Energy by UChicago Argonne, LLC [DE-AC02-06CH11357]
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Lithium oxalyldifluoroborate (LiODFB) has been investigated as an organic electrolyte additive to improve the cycling performance of LiS batteries. Cell test results demonstrate that an appropriate amount of LiODFB added into the electrolyte leads to a high Coulombic efficiency. Analyses by energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and the density functional theory showed that LiODFB promotes the formation of a LiF-rich passivation layer on the lithium metal surface, which not only blocks the polysulfide shuttle, but also stabilizes the lithium surface.
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