期刊
NANO ENERGY
卷 59, 期 -, 页码 110-119出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2019.02.033
关键词
Li metal anode; AlN; Coulombic efficiency; High-rate; High-capacity
类别
资金
- Ningbo Natural Science Foundation [2018A610014]
- Zhejiang Provincial Natural Science Foundation of China [LQ17E020004]
- Ningbo 2025 Project [2018B10060]
- National Key R&D Program of China [2018YFB0905400]
- Chinese Academy of Sciences Instrument Equipment Function Development Project
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy (DOE) through Advanced Battery Materials Research (BMR) program [DE-AC02-05CH11231]
Lithium (Li) metal battery is one of the ideal candidates for the next-generation high-energy-density batteries, but its practical application is still plagued by its large volume change, low coulombic efficiency (CE), and safety issues related to dendrite growth. This work describes a potential solution to these issues using a cross-linked Li9Al4-Li3N-AlN (LLA) structure as a stable host for Li metal anode. The in situ-formed uniform Li9Al4 and Li3N sites on AlN nano-clusters can suppress dendrite growth during the Li plating/stripping process. The intrinsic lithiophilicity of Li9Al4 sites with adjacent Li3N attracts Li+ ions for fast migration and uniform plating/stripping. These unique features lead to dimensional stability of Li@LLA composite anodes (1540 mAh g(-1) and 1600 mAh cm(-3)). High-rate, high-capacity cycling of Li metal anodes has been maintained with a CE of similar to 98% in carbonate-based electrolytes. High capacity retention of 90.1% is achieved for a Li@LLA parallel to LiNi0.8Co0.1Mn0.1O2 full cell at the 200th cycle. Therefore, the LLA structure with a simple fabrication process could be a promising candidate to enhance the safety of next-generation Li metal batteries.
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