期刊
NANO ENERGY
卷 50, 期 -, 页码 685-690出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2018.06.011
关键词
Lithium-sulfur batteries; Molybdenum; in situ XRD; Sulfur host
类别
资金
- National Nature Science Foundation of China [21403157, 21773176]
- Fundamental Research Funds for the Central Universities [2042017kf0232]
- Wuhan University
- National Science Foundation [CBET1408751]
- U.S. Department of Energy [DE-AC02-06CH11357]
Molybdenum, for the first time, was used as a new type of sulfur host for lithium-sulfur batteries and exhibited outstanding electrochemical performance, even over traditional porous carbon hosts. A Mo-S composite, with 80 wt% sulfur loading, delivered reversible capacities of 1003 mAh g(-1) after 130 cycles at 0.1 C, and 786 mAh g(-1) after 100 cycles at 5.0 C. Further analysis using in situ X-ray diffraction, cyclic voltammetry, and density functional theory calculations demonstrated that the Mo surface can not only effectively trap polysulfides, but also catalytically decompose polysulfides and Li2S.
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