Abstract:
Molybdenum disulfide (MoS
2) 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 MoS
2 and the serious change in the volume of the electrode material during the charge-discharge cycle, the specific capacity of MoS
2 rapidly decays, hindering the MoS
2 material as a battery electrode. In this work, a novel C/SnS/MoS
2 nanotube was designed and synthesized. Specifically, Sn was coated with Sn-MOF on one-dimensional MoO
3 nanoribbons, and then vulcanized to obtain C/SnS/MoS
2 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 MoS
2, 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.