期刊
ACS NANO
卷 8, 期 10, 页码 10963-10972出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn505480w
关键词
atomic layer deposition; lithium-sulfur battery; nanoscale Li2S films
类别
资金
- Center for Electrical Energy Storage: Tailored Interfaces, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- National Science Foundation-Earth Sciences [EAR-1128799]
- Department of Energy-GeoSciences [DE-FG02-94ER14466]
- Canada NSERC
Lithium-sulfur (Li-S) batteries hold great promise to meet the formidable energy storage requirements of future electrical vehicles but are prohibited from practical implementation by their severe capacity fading and the risks imposed by Li metal anodes. Nanoscale Li2S offers the possibility to overcome these challenges, but no synthetic technique exists for fine-tailoring Li2S at the nanoscale. Herein we report a vapor-phase atomic layer deposition (ALD) method for the atomic-scale-controllable synthesis of Li2S. Besides a comprehensive investigation of the ALD Li2S growth mechanism, we further describe the high performance of the resulting amorphous Li2S nanofilms as cathodes in Li-S batteries, achieving a stable capacity of similar to 800 mA.h/g, nearly 100% Coulombic efficiency, and excellent rate capability. Nanoscale Li2S holds great potential for both bulk-type and thin-film high-energy Li-S batteries.
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