Preparation and lithium-storage properties of hollow sphere MoS2/C nanocomposites
Molybdenum disulfide(MoS2)is a classical layered transition metal sulfide,which exhibits excellent performance as cathode materials for lithium-ion batteries.In this research,hollow spherical nano-MoS2 was synthesized by thermal decomposition,and then the carbon coated MoS2 was prepared with dopamine hydrochloride as carbon source.Various characterization techniques such as XRD,SEM,and Raman spectroscopy were used to analyze the composition and structure of MoS2/C nano-composites.The size of MoS2/C nanocomposites is 150-250 nm and the thickness of carbon layer is 40-70 nm.The hollow spherical structure of nano MoS2 can effectively alleviate the intense volume change during cycling.The coating of carbon layer on the surface can effectively improve the conduc-tivity of MoS2,and enhance the structural stability.As a result,this novel ordered structure delivers a high initial specific capacity of 1 132.1 mA·h/g and remain 587.4 mA·h/g over 50 cycles,thus exhibiting great potential as an anode composite structure for durable high-rate lithium-ion batteries.
万方数据
