Author(s)

E. Sheha¹, M. H. Makled¹, Walaa M. Nouman¹, A. Bassyouni¹, S. Yaghmour², S. Abo-Elhassan¹

¹Physics Department, Faculty of Science, Benha University, Benha, Egypt.
²Physics Department, Faculty of Science, University of Jeddah Branch, Jeddah, KSA.

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.

Magnesium Batteries, Vanadium Oxide, Graphene, Conductivity

Sheha, E. , Makled, M. , Nouman, W. , Bassyouni, A. , Yaghmour, S. and Abo-Elhassan, S. (2016) Vanadium Oxide/Graphene Nanoplatelet as a Cathode Material for Mg-Ion Battery. Graphene, 5, 178-188. doi: 10.4236/graphene.2016.54015.