期刊
JOULE
卷 2, 期 1, 页码 110-124出版社
CELL PRESS
DOI: 10.1016/j.joule.2017.10.007
关键词
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资金
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy (DOE), under the Advanced Battery Materials Research (BMR) program [DE-AC02-05CH11231, 18769]
- DOE's Office of Biological and Environmental Research
- DOE [DE-AC05-76RLO1830]
Lithium (Li) metal batteries (LMBs) have recently attracted extensive interest in the energy-storage field after silence from the public view for several decades. However, many challenges still need to be overcome before their practical application, especially those that are related to the interfacial instability of Li metal anodes. Here, we reveal for the first time that the thickness of the degradation layer on the metallic Li anode surface shows a linear relationship with Li areal capacity utilization up to 4.0 mAh cm(-2) in a practical LMB system. The increase in Li capacity utilization in each cycle causes variations in the morphology and composition of the degradation layer on the Li anode. Under high Li capacity utilization, the current density for charge (i.e., Li deposition) is identified to be a key factor controlling the corrosion of the Li metal anode. These fundamental findings provide new perspectives for the development of rechargeable LMBs.
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