期刊
NATURE COMMUNICATIONS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms7362
关键词
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资金
- Joint Center for Energy Storage Research
- Energy Innovation Hub - U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences
- DOE's Office of Biological and Environmental Research (BER)
- Linus Pauling distinguished Postdoctoral Fellowship of PNNL
- U.S. Army Research Laboratory
- DOE [DE-AC05-76RLO1830]
Lithium metal is an ideal battery anode. However, dendrite growth and limited Coulombic efficiency during cycling have prevented its practical application in rechargeable batteries. Herein, we report that the use of highly concentrated electrolytes composed of ether solvents and the lithium bis(fluorosulfonyl) imide salt enables the high-rate cycling of a lithium metal anode at high Coulombic efficiency (up to 99.1%) without dendrite growth. With 4M lithium bis(fluorosulfonyl) imide in 1,2-dimethoxyethane as the electrolyte, a lithium|lithium cell can be cycled at 10mA cm(-2) for more than 6,000 cycles, and a copper|lithium cell can be cycled at 4mA cm(-2) for more than 1,000 cycles with an average Coulombic efficiency of 98.4%. These excellent performances can be attributed to the increased solvent coordination and increased availability of lithium ion concentration in the electrolyte. Further development of this electrolyte may enable practical applications for lithium metal anode in rechargeable batteries.
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