Preparation of Carbon Nanotube-Coated MoS2 Lithium Anode Material and its Performance Study
Molybdenum disulfide(MoS2),as an excellent two-dimensional layered material,is an ideal candidate for the anode of lithium-ion batteries.However,the stacking nature of MoS2 2D layered structure,volume expansion during charging and discharging,and its own low conductivity limit its development in lithium-ion batteries.In this work,we synthesized MoS2@C composites by compositing MoS2 with glucose,an organic carbon source.Experiments showed that the carbon nanotubes formed after carbonization of different contents of glucose had a significant effect on the hydrothermal growth of the presence of MoS2,and we synthesized MoS2@C composites grown in the inner layer of carbon nanotubes by regulating the content of glucose,which had a high specific capacity,and better structural stability,less specific capacity decay during charging and discharging.When used as an anode material for lithium-ion batteries,it maintains a specific capacity of 680.7 mAhg-1 after 100 cycles at a current density of 0.2 Ag-1,and a reversible specific capacity of 580.9 mAhg-1 after 1000 cycles at a current density of 1 Ag1.Meanwhile,the sulfidation reaction process of MoS2@C in the hydrothermal process was analyzed to provide a new path for the rational preparation of MoS2 composites with carbon.
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