Abstract:In recent years, sodium-ion batteries have become a hot research topic due to the abundance and cost-effectiveness of sodium resources. Nevertheless, the large radius of Na+ may lead to the structural instability of the material, which affects the performance of sodium-ion batteries (SIBs). MoS2, as an anode material with high theoretical specific capacity, can provide more charge storage space. However, the intercalation/deintercalation processes of Na+ in MoS2 may cause large volume changes, which may damage the structure and thus shorten the cycle life. In this study, C@MoS2/C@C complexes with a sandwich structure were successfully prepared by alternating electrospinning technique as an anode material for SIBs. The electrode maintains a discharge specific capacity of 270.1 mAh/g after 100 cycles at 0.1 A/g, showing excellent capacity retention and good cycling stability. In addition, kinetic analyses reveal that C@MoS2/C@C electrode has remarkable capacitive charge storage properties. This work provides new perspectives and methods to improve the stability of MoS2 for SIBs.