期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 37, 页码 15839-15843出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202001989
关键词
electrolytes; fuel cells; lithium metal anodes; materials science; nanostructures
资金
- Ministry of Education of Singapore through the Academic Research Fund (AcRF) [MOE2017-T2-2-003, RG110/17, RG116/18]
- National Natural Science Foundation of China [51722210, 51972285, 21902144]
The growth of Li dendrites hinders the practical application of lithium metal anodes (LMAs). In this work, a hollow nanostructure, based on hierarchical MoS(2)coated hollow carbon particles preloaded with sulfur (C@MoS2/S), was designed to modify the LMA. The C@MoS(2)hollow nanostructures serve as a good scaffold for repeated Li plating/stripping. More importantly, the encapsulated sulfur could gradually release lithium polysulfides during the Li plating/stripping, acting as an effective additive to promote the formation of a mosaic solid electrolyte interphase layer embedded with crystalline hybrid lithium-based components. These two factors together effectively suppress the growth of Li dendrites. The as-modified LMA shows a high Coulombic efficiency of 98 % over 500 cycles at the current density of 1 mA cm(-2). When matched with a LiFePO(4)cathode, the assembled full cell displays a highly improved cycle life of 300 cycles, implying the feasibility of the proposed LMA.
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