Evidence for a nanosize effect on the structural and high performance electrochemical properties of V2O5 obtained via fluorine chemistry

In this study, we demonstrate the benefit of an original vanadium pentoxide (V2O5) nanostructuration on the electrochemical performances. This new synthesis way of high purity nanosized V2O5 consists in a facile fluorination reaction of micro-V2O5 in aqueous solution followed by a heat-treatment at...

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Bibliographic Details
Published in:Electrochimica acta 2017-08, Vol.245, p.350-360
Main Authors: Huo, D., Contreras, A., Laïk, B., Bonnet, P., Guérin, K., Muller-Bouvet, D., Cenac-Morthe, C., Baddour-Hadjean, R., Pereira-Ramos, J.-P.
Format: Article
Language:English
Subjects:
aqueous fluorination synthesis
Batteries
Chemistry
Disruption
Electrochemical analysis
Electrochemistry
Fluorination
Fluorine
Heat treatment
high performance V2O5
Interlayers
Li batteries
Lithium
Microspectrometry
nanosized V2O5
Nanostructured materials
solid solution behavior
Vanadium pentoxide
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Summary:In this study, we demonstrate the benefit of an original vanadium pentoxide (V2O5) nanostructuration on the electrochemical performances. This new synthesis way of high purity nanosized V2O5 consists in a facile fluorination reaction of micro-V2O5 in aqueous solution followed by a heat-treatment at low temperature (230°C). Highly porous calisson-like particles with crystallite sizes in the 13–30nm range are obtained. Remarkably, this nanostructured V2O5 exhibits outstanding rate capacities and cycling stabilities. This material can deliver reversible capacities of 260mAhg−1 at 15mAg−1 (C/10 rate) and 150mAhg−1 at 300mAg−1 (2C rate), as well as a stable capacity of 200mAhg−1 at C rate after 50 cycles. The unique structural features of nano-LixV2O5 electrodes are determined over the large Li composition range 0≤x
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.05.147