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

Bingwen Hu; Chao Li; Ming Shen; Bei Hu; Xiaobing Lou; Xi Zhang; Wei Tong

doi:10.1039/c8ta00568k

High-energy nanostructured Na₃V₂(PO₄)₂O_1.6F_1.4 cathodes for sodium-ion batteries and a new insight into their redox chemistry

Bingwen Hu^*
, Chao Li
, Ming Shen
, Bei Hu
, Xiaobing Lou
, Xi Zhang
, Wei Tong

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

A microwave-assisted solvothermal procedure is employed for the rapid fabrication of nanostructured Na₃V₂(PO₄)₂O_1.6F_1.4 with a space group of I4/mmm. This Na₃V₂(PO₄)₂O_1.6F_1.4 exhibits a high energy density (518 W h kg^-1) and impressive power performance (11127 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)₂O_1.6F_1.4 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)₂O_1.6F_1.4, corresponding to a total amount of 2 electrons transferred per formula unit; (ii) the Na extraction/intercalation process is mainly a solid-solution mechanism.

Original language	English
Pages (from-to)	8340-8348
Number of pages	9
Journal	Journal of Materials Chemistry A
Volume	6
Issue number	18
DOIs	https://doi.org/10.1039/c8ta00568k
State	Published - 2018
Externally published	Yes

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@article{320d661a007f49e28033d9e2c176321f,

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

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 (11127 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.",

author = "Bingwen Hu and Chao Li and Ming Shen and Bei Hu and Xiaobing Lou and Xi Zhang and Wei Tong",

note = "Publisher Copyright: {\textcopyright} 2018 The Royal Society of Chemistry.",

year = "2018",

doi = "10.1039/c8ta00568k",

language = "英语",

volume = "6",

pages = "8340--8348",

journal = "Journal of Materials Chemistry A",

issn = "2050-7488",

publisher = "Royal Society of Chemistry",

number = "18",

}

TY - JOUR

T1 - High-energy nanostructured Na3V2(PO4)2O1.6F1.4 cathodes for sodium-ion batteries and a new insight into their redox chemistry

AU - Hu, Bingwen

AU - Li, Chao

AU - Shen, Ming

AU - Hu, Bei

AU - Lou, Xiaobing

AU - Zhang, Xi

AU - Tong, Wei

PY - 2018

Y1 - 2018

N2 - 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 (11127 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.

AB - 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 (11127 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.

UR - https://www.scopus.com/pages/publications/85046850390

U2 - 10.1039/c8ta00568k

DO - 10.1039/c8ta00568k

M3 - 文章

AN - SCOPUS:85046850390

SN - 2050-7488

VL - 6

SP - 8340

EP - 8348

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 18

ER -

High-energy nanostructured Na₃V₂(PO₄)₂O_1.6F_1.4 cathodes for sodium-ion batteries and a new insight into their redox chemistry

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