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.
关键词
Sn-MOF/分级结构/一维纳米材料/锂离子电池
Key words
Sn-MOF/Hierarchical structure/1D nanomaterials/Lithium ion batteries
万方数据