Abstract
The MoO₃/V₂O5/C, MoO₃/C and V₂O5/C are synthesized by electrospinning combined with heat treatment. These samples are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy and thermogravimetric analysis (TG) techniques. The results show that sample MoO₃/V₂O5/C is a composite composed from MoO₃, V₂O5 and carbon. It takes on morphology of the nanofibers with the diameter of 200~500 nm. The TG analysis result showed that the carbon content in the composite is about 40.63%. Electrochemical properties for these samples are studied. When current density is 0.2 A g-1, the MoO₃/V₂O5/C could retain the specific capacity of 737.6 mAh g-1 after 200 cycles and its coulomb efficiency is 92.99%, which proves that MoO₃/V₂O5/C has better electrochemical performance than that of MoO₃/C and V₂O5/C. The EIS and linear Warburg coefficient analysis results show that the MoO₃/V₂O5/C has larger Li+ diffusion coefficient and superior conductivity than those of MoO₃/C or V₂O5/C. So MoO₃/V₂O5/C is a promising anode material for lithium ion battery application.
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