期刊
MATERIALS TODAY COMMUNICATIONS
卷 31, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mtcomm.2022.103740
关键词
MXene; Sodium-ion batteries; MoSe 2; Active anode material
资金
- National Natural Science Foundation of China [21905069]
- Shenzhen Science and Technology Innovation Committee [JCYJ20180507183907224, KQTD20170809110344233]
- Economic, Trade and Information Commission of Shenzhen Municipality through Graphene Manufacture Innovation Center [201901161514]
- Guangdong Province Covid-19 Pandemic Control Research Fund [2020KZDZX1220]
- Shenzhen Basic Research Free Exploration Project [JCYJ20180306171650007]
In this study, carbon-coated MoSe2/MXene heterostructures were developed as active anode materials for sodium-ion batteries. The material showed exceptional stability even after 2200 cycles and exhibited high capacity and retention rates.
Despiting the technological promise and environmental friendliness of sodium-ion batteries (SIBs), relatively large sizes of Na-ions and moderate oxidation-reduction response slows down their wider-spread industrial implementation. To overcome this obstacle, we developed carbon-coated MoSe2/MXene heterostructures, in which MXene was covered on the MoSe2 particles and the loose carbon linked all the coated particles while providing porosity. The density-functional theory was used to understand the electronic structure of the carbon-coated MoSe2/MXene (MoSe2/Mo2CTx/C) and the mechanism of exchanging charge between MoSe2 and MXene. MoSe2/Mo2CTx/C as active anode material showed exceptional stability even after 2200 cycles in SIBs. Specif-ically, the capacities and retention rates observed for the batteries containing MoSe2/Mo2CTx/C and cycled at 0.5, 1, and 2 A g(-1) rates were equal to 652.2, 484.4, and 238.4 mAh g(-1) and 102.5%, 103.9%, and 86.3%, respectively. Thus, carbon-coated MoSe2/MXene can be utilized as active SIB anode materials.
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