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通过一种单步水热法成功制备了花状VS_2纳米片。利用X射线衍射仪(XRD)、拉曼光谱、场发射扫描电镜(SEM)和透射电子显微镜(TEM)等手段对样品进行表征,并研究了其生长机制。实验结果表明:反应温度及时间的不同直接影响着VS_2纳米片的形貌。此外,通过使用VS_2纳米片作为锂离子电池阳极材料,分别研究了充放电电压和循环性能等性质。在200 m A/g电流密度下,电池初始充放电能力分别为195.4和90.6 m Ah/g。随着循环充放电的进行,该电极材料的库伦效率高达98%。可以认为VS_2纳米材料具备高效、高能量密度锂离子电池的阳极材料。
Flower-like VS_2 nanosheets were successfully prepared by a one-step hydrothermal method. The samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The growth mechanism was also studied. The experimental results show that the different reaction temperature and time directly affect the morphology of VS_2 nanosheets. In addition, by using VS_2 nanosheets as anode materials for lithium-ion batteries, the properties of charge-discharge voltage and cycle performance were studied respectively. At a current density of 200 mA / g, the initial charge-discharge capacity of the battery was 195.4 and 90.6 mAh / g, respectively. With the cycle of charge and discharge, the electrode material has a Coulometric efficiency of up to 98%. VS_2 nanomaterials can be considered as anode material for high efficiency, high energy density lithium ion batteries.