Lithium-Ion Batteries Properties of C/SnS/MoS₂ Hierarchical Nanotubes Constructed from Tin-Based MOF

Molybdenum disulfide (MoS₂) has been the focus of research on anode materials for lithium-ion batteries with its high theoretical capacity (662 mAhg⁻¹) and large layer spacing (0.62 nm). However, due to the poor inherent electronic/ionic conductivity of MoS₂ and the serious change in the volume of the electrode material during the charge-discharge cycle, the specific capacity of MoS₂ rapidly decays, hindering the MoS₂ material as a battery electrode. In this work, a novel C/SnS/MoS₂ nanotube was designed and synthesized. Specifically, Sn was coated with Sn-MOF on one-dimensional MoO₃ nanoribbons, and then vulcanized to obtain C/SnS/MoS₂ nanotubes that retained the surface nanosheet structure. This preparation method not only retains the nanosheet structure of the surface but also leaves a thin layer of amorphous carbon on the surface. Thanks to the superior structural design, there is a synergy between SnS and MoS₂, which not only improves the conductivity but also improves the stability of the battery cycle. When used as electrode material, the composite can maintain 1110.2 mAhg⁻¹ discharge specific capacity after 80 cycles at 0.1 Ag⁻¹ current density and 801.7 mAhg⁻¹ discharge specific capacity after 860 cycles at 2 Ag⁻¹ high current density.