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Issue 10, 2014
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Electrospun Na3V2(PO4)3/C nanofibers as stable cathode materials for sodium-ion batteries

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Abstract

Sodium-ion batteries are considered as prime alternatives to lithium-ion batteries for large-scale renewable energy storage units due to their low cost and the abundance of sodium bearing precursors in the earth's mineral deposits. In the current work, a 3D NASICON framework Na3V2(PO4)3/carbon cathode electrode with 20–30 nm Na3V2(PO4)3 nanoparticles uniformly encapsulated interconnecting one-dimensional carbon nanofibers was fabricated using a simple and scalable electrospinning method. The Na3V2(PO4)3/C cathode showed an initial charge capacity of 103 mA h g−1 and a discharge capacity of 101 mA h g−1 (calculated on the total mass of Na3V2(PO4)3 and carbon) at 0.1C rate, and retained stable discharge capacities of 77, 58, 39 and 20 mA h g−1 at high current densities of 2C, 5C, 10C and 20C, respectively. Moreover, because of the efficient 1D sodium-ion transport pathway and the highly conductive network of Na3V2(PO4)3/C, the electrode exhibited high overall capacities even when cycled at high currents, extending its usability to high power applications.

Graphical abstract: Electrospun Na3V2(PO4)3/C nanofibers as stable cathode materials for sodium-ion batteries

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Publication details

The article was received on 07 Oct 2013, accepted on 26 Jan 2014 and first published on 29 Jan 2014


Article type: Communication
DOI: 10.1039/C3NR05329F
Citation: Nanoscale, 2014,6, 5081-5086
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    Electrospun Na3V2(PO4)3/C nanofibers as stable cathode materials for sodium-ion batteries

    J. Liu, K. Tang, K. Song, P. A. van Aken, Y. Yu and J. Maier, Nanoscale, 2014, 6, 5081
    DOI: 10.1039/C3NR05329F

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