The aim of the present work is to introduce a high performance cathode for magnesium-ion batteries. A simple ball mill process is employed to synthesize (V2O5)1-x (Graphene Nanoplatelets (GNP))x nanocomposite, (where x = 0, 5, 10, 15, 20 and 25 wt.% GNP). The synthesized samples are characterized using scanning electron microscope (SEM), X-ray diffraction (XRD) technique, impedance spectroscopy, cyclic voltammetry and charge-discharge test. The maximum conductivity of the investigated samples was found to be 6 × 10-1 S/cm for optimum composite film (25 wt% GNP) at room temperature. Room temperature rechargeable magnesium batteries are constructed from Mg as anode material, (V2O5)1-x(GNP)x as a cathode material and the simple non-aqueous electrolyte based MgNO3·6H2O. Mg/V2O5 cells employing as-prepared electrolyte exhibit initial discharge capacity ~100 mAhg-1 while Mg/(V2O5/GNP (x = 25t.%)) cathode produces a lower initial capacity of ~90 mAhg-1. The high initial discharge capacity of V2O5 can be attributed to the presence of a large (001) interlayer spacing (～11.53 A) for facile Mg+ insertion/extraction.
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