Vanadium Oxide/Graphene Nanoplatelet as a Cathode Material for Mg-Ion Battery

Abstract

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 (V 2 O 5 ) 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, (V 2 O 5 ) 1−x (GNP) x as a cathode material and the simple non-aqueous electrolyte based MgNO 3 • 6 H 2 O. Mg/V 2 O 5 cells employing as-prepared electrolyte exhibit initial discharge capacity ∼100 mAhg −1 while Mg/(V 2 O 5 /GNP (x = 25t.%)) cathode produces a lower initial capacity of ∼90 mAhg −1 . The high initial discharge capacity of V 2 O 5 can be attributed to the presence of a large (001) interlayer spacing (∼11.53 Å) for facile Mg + insertion/extraction.

Nanostructured Design Cathode Materials for Magnesium-Ion Batteries

“…Sheha et al opened up new possibilities for cathode materials in MIBs using the high capacities of the above prepared V 2 O 5 and V 2 O 5 /GNP cathodes, which are 100 and 90 mAh g −1 , respectively. 72 Later, in a cell-configuration system, orthorhombic V 2 O 5 nanowires were produced and employed as cathodes, together with the Mg x Mo 6 S 8 anode and 1 M Mg(ClO 4 ) 2 electrolyte. With an initial discharge capacity (103 mAh g −1 ) and charge capacity (110 mAh g −1 ), the The structural development and reversibility of Mg insertion/ extraction were observed by operando synchrotron diffraction and X-ray absorption spectroscopy during cycling.…”

“…Improved electrical performance is attributed to the combination of V 2 O 5 and graphene nanoparticles (GNPs) in the V 2 O 5 /GNP cathode, which was manufactured by using a ball mill technique. Sheha et al opened up new possibilities for cathode materials in MIBs using the high capacities of the above prepared V 2 O 5 and V 2 O 5 /GNP cathodes, which are 100 and 90 mAh g –1 , respectively . Later, in a cell-configuration system, orthorhombic V 2 O 5 nanowires were produced and employed as cathodes, together with the Mg x Mo 6 S 8 anode and 1 M Mg­(ClO 4 ) 2 electrolyte.…”

Preparation of Pt electrocatalyst supported by novel, Ti(1−x)MoxO2-C type of composites containing multi-layer graphene

“…Ball milling has been successfully used for preparation of hybrid materials from another carbon sources too, e.g. multi-layer graphene (MLG) for MLG/Cu composite powders [35], GNP for (V 2 O 5 ) 1−x (GNP) x nanocomposite [36], Vulcan carbon for Pt-Co electrocatalysts [37] carbon nanotubes for carbon nanotube-inorganic hybrids [38], etc.…”