Abstract
In this work, we study the synthesis and electrochemical performance of Na3V2(PO4)3/C and multi-walled carbon nanotubes (MWCNTs) hybrid nanocomposite for use as cathode material in high performance sodium-ion batteries. This nanostructured hybrid material is prepared through a hydrothermal-assisted sol–gel process followed by thermal annealing. The obtained sample has been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman spectrum. The crosslinked MWCNTs can provide good electronic conductive pathways interconnecting Na3V2(PO4)3/C particles. Electrode fabricated from this hybrid material delivers a high reversible capacity and superior rate performance up to an extremely high rate of 10C. Moreover, ultralong cycling stability is also attained through 500cycles at 10C with 93.9% capacity retention. These results demonstrate that the addition of MWCNTs is an effective way to improve the electrochemical performance of Na3V2(PO4)3/C cathode material for sodium-ion batteries.
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