Journal
CHEMELECTROCHEM
Volume 3, Issue 6, Pages 858-863Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201600139
Keywords
atomic layer deposition; dendrites; energy storage; lithium; solid-state electrolytes
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Funding
- Joint Center for Energy Storage Research (JCESR), Energy Innovation Hub - U.S. Department of Energy, Office of Science, Basic Energy Sciences (BES)
- U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- China Scholarship Council at Argonne National Laboratory
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Increasing global demands for energy storage in electric vehicles and the grid necessitate beyond-lithium-ion batteries that simultaneously exhibit high capacity, long-term cyclability, and excellent safety. Several candidates, most notably lithium-air and lithium-sulfur batteries, utilize lithium-metal anodes. Although the specific capacity of lithium metal is unrivaled (3860 mAhg(-1)), the capacity fade and risk of catastrophic failure must be overcome. Herein, we describe ultrathin, ionically conducting lithium aluminum sulfide (LixAlyS) coatings prepared on lithium-metal anodes by using atomic layer deposition, which stabilize the Li-electrolyte interface and reduce (up to five times) the interfacial impedance of lithium-metal anodes in contact with organic electrolyte. We demonstrate that these thin films effectively suppress dendrite formation and preserve a smooth, low-surface-area morphology for electrodeposited lithium metal, thereby doubling the lifetime of Li-Cu asymmetric cells.
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