Issue 18, 2018
From the journal:

Journal of Materials Chemistry A

High-energy nanostructured Na3V2(PO4)2O1.6F1.4 cathodes for sodium-ion batteries and a new insight into their redox chemistry†

Chao Li, ORCID logo a   Ming Shen, ORCID logo a   Bei Hu,a   Xiaobing Lou, ORCID logo a   Xi Zhang,b   Wei Tongc  and  Bingwen Hu ORCID logo *a  

* Corresponding authors

a State Key Laboratory of Precision Spectroscopy, Shanghai Key Laboratory of Magnetic Resonance, Institute of Functional Materials, School of Physics and Materials Science, East China Normal University, Shanghai 200062, P. R. China
E-mail: bwhu@phy.ecnu.edu.cn

b Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China

c Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, P. R. China

Abstract

A microwave-assisted solvothermal procedure is employed for the rapid fabrication of nanostructured Na3V2(PO4)2O1.6F1.4 with a space group of I4/mmm. This Na3V2(PO4)2O1.6F1.4 exhibits a high energy density (518 W h kg−1) and impressive power performance (11 127 W kg−1 while retaining an energy density of 306 W h kg−1) in Na-ion coin cells. Furthermore, the redox chemistry of Na3V2(PO4)2O1.6F1.4 was investigated by combination of electron paramagnetic resonance and X-ray diffraction techniques. The results substantiate that: (i) both V3+/V4+ and V4+/V5+ couples are active in this Na3V2(PO4)2O1.6F1.4, corresponding to a total amount of 2 electrons transferred per formula unit; (ii) the Na extraction/intercalation process is mainly a solid-solution mechanism.

Graphical abstract: High-energy nanostructured Na3V2(PO4)2O1.6F1.4 cathodes for sodium-ion batteries and a new insight into their redox chemistry

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Article information

DOI
https://doi.org/10.1039/C8TA00568K
Article type
Paper
Submitted
18 Jan 2018
Accepted
03 Apr 2018
First published
05 Apr 2018

J. Mater. Chem. A, 2018,6, 8340-8348

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High-energy nanostructured Na3V2(PO4)2O1.6F1.4 cathodes for sodium-ion batteries and a new insight into their redox chemistry

C. Li, M. Shen, B. Hu, X. Lou, X. Zhang, W. Tong and B. Hu, J. Mater. Chem. A, 2018, 6, 8340 DOI: 10.1039/C8TA00568K

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