期刊
APPLIED PHYSICS LETTERS
卷 98, 期 18, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3585655
关键词
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资金
- Laboratory Directed Research and Development (LDRD) at Sandia National Laboratories (SNL)
- Science of Precision Multifunctional Nanostructures for Electrical Energy Storage (NEES)
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DESC0001160]
- U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
- NSF through University of Pittsburgh [CMMI 08 010934]
- Sandia National Laboratory
- NSF [DMR-0520020, DMR-1008104]
- AFOSR [FA9550-08-1-0325]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0825842] Funding Source: National Science Foundation
Lithium (Li) dendrite formation has been recognized as one of the major safety concerns for Li metal batteries but not for conventional Li ion batteries (LIBs) where Li metal is not used. With the advanced in situ transmission electron microscopy enabling direct observation of battery operation, we found that Li fibers with length up to 35 mu m grew on nanowire tip after charging. The Li fibers growth were highly directional, i.e., nucleating from the nanowire tip, and extending along the nanowire axis, which was attributed to the strong electric field enhancement effect induced by the sharp nanowire tip. This study reveals a potential safety concern of short-circuit failure for LIBs using nanowire anodes. (C) 2011 American Institute of Physics. [doi:10.1063/1.3585655]
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