MoS<sub>2</sub> Nanosheet Coated Carbon Nanofibers\nfor Sodium Storage

Finding\nsuitable anode materials with outstanding properties is\ncrucial for the practical application of sodium ion batteries (SIBs).\nAs a SIB anode, molybdenum disulfide (MoS<sub>2</sub>) has received\nwidespread attention with superior theoretical capacity (670 mA h\ng<sup>–1</sup>); nevertheless, its poor conductivity and larger\nvolume change limit its further application. In this paper, MoS<sub>2</sub> nanosheet coated carbon nanofiber (CNF-MoS<sub>2</sub>) was\nprepared by electrospinning and vulcanization. The MoS<sub>2</sub> nanosheets in the prepared sample are small, and there is no obvious\nagglomeration, which is advantageous for promoting the fast transfer\nof sodium ions and enhancing the electrochemistry properties of the\nelectrodes. Meanwhile, the presence of three-dimensional network carbon\nnanofibers can enhance the conductivity and mitigate the volume change\nof MoS<sub>2</sub>. Electrochemical kinetics tests reveal that capacitive\nbehavior predominates during the cycling process of the CNF-MoS<sub>2</sub> electrode, resulting in good rate capability, with a reversible\nspecific capacity maintained at 334.2 mA h g<sup>–1</sup> under\n1 A g<sup>–1</sup> after 1000 cycles. This research lays a\nfoundation for the practical application of CNF-MoS<sub>2</sub> in\nSIB anode materials.