One-pot Synthesis of Hierarchical Flower-like WS2Microspheres as Anode Materials for Lithium-ion Batteries

3D hierarchical flowerlike WS2 microspheres were synthesized through a facile one-pot hydrothermal route.The as-synthesized samples were characterized by powder X-ray powder diffraction （XRD）,energy-dispersive spectroscopy （EDS）,scanning electron microscopy （SEM） and Raman.SEM images of the samples reveal that the hierarchical flowerlike WS2 microspheres with diameters of about 3-5μm are composed of a number of curled nanosheets.Electrochemical tests such as charge/discharge,cyclic voltammetry,cycle life and rate performance were carried out on the WS2 sample.As an anode material for lithium-ion batteries,hierarchical flowerlike WS2 microspheres show excellent electrochemical performance.At a current density of100 mA?g-1,a high specific capacity of 647.8 mA?h?g-1 was achieved after 120 discharge/charge cycles.The excellent electrochemical performance of WS2 as an anode material for lithium-ion batteries can be attributed to its special 3D hierarchical structure.