期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 2, 页码 2354-2361出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b17200
关键词
MoO3; carbon nanotube; freestanding membrane; synchrotron X-ray absorption spectroscopy; lithium-sulfur batteries
资金
- NSFC [51502039]
- Science & Technology Commission of Shanghai Municipality [19ZR1404200, DE-AC02-06CH11357]
Lithium-sulfur (Li-S) batteries have been regarded as a promising candidate of secondary batteries to satisfy the enormous demand for electric vehicles and energy storage applications. However, Li-S batteries still suffer from severe capacity fading due to the shuttle effect of lithium polysulfides. Here, we develop a freestanding double-layer MoO3/carbon nanotube@S (FMC@S) membrane by hydrothermal and suction filtration strategy, without polymer binder and current collector substrate. FMC@S contains a polysulfide blocking layer and an active material layer. Except for S content, the two layers have the same components and are integrated together, so there is no distinct interface between the two layers, which can facilitate ion and electron transport. As a result, the FMC@S cathode delivers promising capacity retention and rate capability. The hierarchical integrated design provides a new strategy to develop high-performance flexible cathodes for Li-S batteries.
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