Journal
ACS NANO
Volume 14, Issue 11, Pages 15577-15586Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c06250
Keywords
sodium-ion batteries; MoS2; tubular; nanosheets; hierarchical
Categories
Funding
- Natural Science Foundation of China [51925207, 51872277, U1910210, U1704256, 21771166]
- Key Research Projects of Henan Education Department [19A150011, 21A150058]
- Fundamental Research Funds for Central Universities [WK2060140026]
- Natural Science Foundation of Henan Province [182300410267]
- Dalian National Laboratory for Clean Energy (DNL), CAS, DNL Cooperation Fund, CAS [DNL180402, DNL180310]
Ask authors/readers for more resources
Emerging sodium-ion batteries (SIBs) have aroused great attention in large-scale energy storage. However, it is still a great challenge to develop suitable electrode materials due to the large radius of Na+. This work demonstrates a strategy to synthesize hierarchical tubular MoS2 via a facial hydrothermal method with the assistance of tetramethylammonium bromide (TMAB). The results show that sufficient amounts of TMA(+) ions are necessary to form the hierarchical tubular structures of MoS2. The obtained tubular MoS2 displays a high diffusion coefficient of Na+ ions, a high specific capacity of 652.5 mAh/g at the current density of 100 mA/g after 50 cycles, and a good cycling stability (94.2% of the initial capacity can be retained after 100 cycles at 1000 mA/g). In situ XRD during the discharge/charge process displays a reversible intercalation/deintercalation of Na+ into MoS2 layers followed by a conversion-type reaction. Systematic analyses reveal that the enhanced electrochemical performance is attributed to its tubular hierarchical structures with the wall composed of loosely stacked nanosheets, which can provide nearly unobstructed ion transportation paths, sufficient active sites, and enough space to mitigate the effects of the volume change during the discharge/charge process. This synthetic approach can be easily extended to other metal oxides and metal sulfides with hierarchical structures for versatile applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available