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Issue 32, 2017
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Superior sodium storage performance of additive-free V2O5 thin film electrodes

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Abstract

A binder- and conductive-agent-free V2O5 thin film electrode was fabricated by a facile and cost-efficient cathodic deposition method directly on stainless steel substrates followed by annealing at 300 °C in air for 1 h. The V2O5 film is approximately 1 μm in thickness and consists of layer-by-layer stacked nanosheets. When used as a cathode for sodium ion batteries, the V2O5 thin film electrode exhibits a high reversible discharge capacity (174 mA h g−1 at 200 mA g−1), excellent cycling stability (almost 100% capacity retention over 200 cycles at 1 A g−1), and outstanding rate capability (retaining a capacity of 124 mA h g−1 at 5 A g−1). Cyclic voltammetric analyses reveal that pseudocapacity-dominated charge storage of sodium ions accounts for the superior performance.

Graphical abstract: Superior sodium storage performance of additive-free V2O5 thin film electrodes

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Publication details

The article was received on 09 Jun 2017, accepted on 18 Jul 2017 and first published on 18 Jul 2017


Article type: Communication
DOI: 10.1039/C7TA05007K
Citation: J. Mater. Chem. A, 2017,5, 16590-16594
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    Superior sodium storage performance of additive-free V2O5 thin film electrodes

    Y. Li, C. Liu, Z. Xie, J. Yao and G. Cao, J. Mater. Chem. A, 2017, 5, 16590
    DOI: 10.1039/C7TA05007K

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