Encapsulating Sb/MoS₂ Into Carbon Nanofibers Via Electrospinning Towards Enhanced Sodium Storage

Metallic antimony (Sb) and molybdenum disulfide (MoS 2 ) are identified as promising anode materials for sodium ion batteries (SIBs) owing to their high theoretical capacities. Herein, both Sb and MoS 2 are integrated and fully embedded into carbon nanofibers (CNFs) to form Sb/MoS 2 @CNFs nanocomposite via an electrospinning technique followed by heat treatment. When employed as anode material for SIBs, the Sb/MoS 2 @CNFs electrode presents a reversible capacity of 282.7 mAh g −1 after 300 cycles at 1 A g −1 , and even 197.5 mAh g −1 after 1350 cycles at a high current density of 5 A g −1 . The superior sodium storage performance of the Sb/MoS 2 @CNFs can be ascribed to the synergistic effect of the integrated Sb/MoS 2 components and their full encapsulation into the one‐dimensional (1D) conductive carbon nanofibers. The well‐dispersed Sb/MoS 2 nanoparticles ensure good Na + ions accessibility and high storage capacity, while 1D nanostructure facilitates ion/electron transport, tolerates the volume expansion, and prevents the Sb/MoS 2 nanoparticles from aggregating during cycling. This work provides a simple and efficient synthetic route of multicomponent anode materials in advanced SIBs.