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Issue 7, 2014
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A promising Na3V2(PO4)3 cathode for use in the construction of high energy batteries

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Abstract

High-energy batteries need significant cathodes which can simultaneously provide large specific capacities and high discharge plateaus. NASICON-structured Na3V2(PO4)3 (NVP) has been utilised as a promising cathode to meet this requirement and be used in the construction of high energy batteries. For a hybrid-ion battery by employing metallic lithium as an anode, NVP exhibits an initial specific capacity of 170 mA h g−1 in the voltage range of 1.6–4.8 V with a long discharge plateau around 3.7 V. Three Na(2) sites for NVP are found capable to be utilised through the application of a wide voltage window but only two of them are able to undergo ions exchange to produce a NaLi2V2(PO4)3 phase. However, a hybrid-ion migration mechanism is suggested to exist to describe the whole ion transport in which the effects of a Na-ion “barrier” results in a lowered ion diffusion rate and observed specific capacity.

Graphical abstract: A promising Na3V2(PO4)3 cathode for use in the construction of high energy batteries

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Publication details

The article was received on 31 Oct 2013, accepted on 02 Jan 2014 and first published on 07 Jan 2014


Article type: Paper
DOI: 10.1039/C3CP54604G
Citation: Phys. Chem. Chem. Phys., 2014,16, 3055-3061
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    A promising Na3V2(PO4)3 cathode for use in the construction of high energy batteries

    W. Song, X. Ji, Y. Yao, H. Zhu, Q. Chen, Q. Sun and C. E. Banks, Phys. Chem. Chem. Phys., 2014, 16, 3055
    DOI: 10.1039/C3CP54604G

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