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<sub>2</sub>O<sub>5</sub>)<sub>1...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<sub>2</sub>O<sub>5</sub>)<sub>1-x</sub> (Graphene Nanoplatelets (GNP))<sub>x</sub> 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<sup>-1</sup> 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<sub>2</sub>O<sub>5</sub>)<sub>1-x</sub>(GNP)<sub>x</sub> as a cathode material and the simple non-aqueous electrolyte based MgNO<sub>3</sub>·6H<sub>2</sub>O. Mg/V<sub>2</sub>O<sub>5</sub> cells employing as-prepared electrolyte exhibit initial discharge capacity ~100 mAhg<sup>-1</sup> while Mg/(V<sub>2</sub>O<sub>5</sub>/GNP (x = 25t.%)) cathode produces a lower initial capacity of ~90 mAhg<sup>-1</sup>. The high initial discharge capacity of V<sub>2</sub>O<sub>5</sub> can be attributed to the presence of a large (001) interlayer spacing (~11.53 A) for facile Mg<sup>+</sup> insertion/extraction.展开更多
文摘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<sub>2</sub>O<sub>5</sub>)<sub>1-x</sub> (Graphene Nanoplatelets (GNP))<sub>x</sub> 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<sup>-1</sup> 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<sub>2</sub>O<sub>5</sub>)<sub>1-x</sub>(GNP)<sub>x</sub> as a cathode material and the simple non-aqueous electrolyte based MgNO<sub>3</sub>·6H<sub>2</sub>O. Mg/V<sub>2</sub>O<sub>5</sub> cells employing as-prepared electrolyte exhibit initial discharge capacity ~100 mAhg<sup>-1</sup> while Mg/(V<sub>2</sub>O<sub>5</sub>/GNP (x = 25t.%)) cathode produces a lower initial capacity of ~90 mAhg<sup>-1</sup>. The high initial discharge capacity of V<sub>2</sub>O<sub>5</sub> can be attributed to the presence of a large (001) interlayer spacing (~11.53 A) for facile Mg<sup>+</sup> insertion/extraction.
