Synthesis of MoO₃/V₂O₅/C Composite as Novel Anode for Li-Ion Battery Application

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.