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Issue 42, 2016
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Ab initio investigations on bulk and monolayer V2O5 as cathode materials for Li-, Na-, K- and Mg-ion batteries

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Abstract

First-principles computations based on density functional theory (DFT) were performed to investigate the performance of bulk and monolayer V2O5 as the cathode material for Li-, Na-, K- and Mg-ion batteries. Both the average voltage and ion migration barrier were studied. The results indicate that alkali metal ions with a large ionic radius (such as Na and K) have much lower migration barriers (0.44 and 0.39 eV for Na and K, respectively) on monolayer V2O5 than in bulk V2O5 (1.17 and 1.66 eV) without great voltage loss, while for Li polymorphs, the difference between monolayer and bulk V2O5 is minimal. However, the performance of monolayer V2O5 is not ideal enough as the cathode material for multivalent metal-ion (such as Mg) batteries. As a result, for Na- and K-ion batteries with a large ionic size, monolayer V2O5 is an attractive cathode material.

Graphical abstract: Ab initio investigations on bulk and monolayer V2O5 as cathode materials for Li-, Na-, K- and Mg-ion batteries

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Publication details

The article was received on 14 Jun 2016, accepted on 14 Sep 2016 and first published on 15 Sep 2016


Article type: Paper
DOI: 10.1039/C6TA04986A
Citation: J. Mater. Chem. A, 2016,4, 16606-16611
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    Ab initio investigations on bulk and monolayer V2O5 as cathode materials for Li-, Na-, K- and Mg-ion batteries

    X. Zhao, X. Zhang, D. Wu, H. Zhang, F. Ding and Z. Zhou, J. Mater. Chem. A, 2016, 4, 16606
    DOI: 10.1039/C6TA04986A

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