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Issue 43, 2014
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Better than crystalline: amorphous vanadium oxide for sodium-ion batteries

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Abstract

Amorphous and nanocrystalline vanadium pentoxide (V2O5) were prepared through a combination of sol–gel processing paired with electrochemical deposition and investigated as cathodes for sodium-ion batteries. Amorphous V2O5 demonstrated superior electrochemical properties upon sodiation as compared to its crystalline counterpart. More specifically, amorphous vanadium pentoxide had a measured capacity of 241 mA h g−1, twice the capacity of its crystalline contemporary at 120 mA h g−1. In addition, the amorphous vanadium pentoxide demonstrated a much higher discharge potential, energy density, and cycle stability. The development of amorphous materials could enable the usage and design of previously unexplored electrode materials; herein, the possible relationship between the improved sodiation properties and the amorphous structure is discussed.

Graphical abstract: Better than crystalline: amorphous vanadium oxide for sodium-ion batteries

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Publication details

The article was received on 22 Jul 2014, accepted on 10 Sep 2014 and first published on 10 Sep 2014


Article type: Communication
DOI: 10.1039/C4TA03788J
Citation: J. Mater. Chem. A, 2014,2, 18208-18214
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    Better than crystalline: amorphous vanadium oxide for sodium-ion batteries

    E. Uchaker, Y. Z. Zheng, S. Li, S. L. Candelaria, S. Hu and G. Z. Cao, J. Mater. Chem. A, 2014, 2, 18208
    DOI: 10.1039/C4TA03788J

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