Vanadium Oxide-Graphene Nanoplatelet as a Cathode Material for Mg-Ion BatteryReportar como inadecuado




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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 V2O51-x Graphene Nanoplatelets GNPx 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, V2O51-xGNPx 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.

KEYWORDS

Magnesium Batteries, Vanadium Oxide, Graphene, Conductivity

Cite this paper

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.





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

Fuente: http://www.scirp.org/



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