Superior Electrochemical Performance and Storage Mechanism of Na3V2(PO4)3 Cathode for Room-Temperature Sodium-Ion Batteries

A Na3V2(PO4)3/C composite with 3.8 wt.% carbon, which was synthesized by a one‐step solid state reaction, exhibits Na storage capacity of 107 mAh g−1 and high coulombic efficiency of 99.8% in a new NaFSI/PC electrolyte. In situ XRD results reveal its sodium storage mechanism as a typical two‐phase r...

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Bibliographic Details
Published in:Advanced energy materials 2013-02, Vol.3 (2), p.156-160
Main Authors: Jian, Zelang, Han, Wenze, Lu, Xia, Yang, Huaixin, Hu, Yong-Sheng, Zhou, Jing, Zhou, Zhibin, Li, Jianqi, Chen, Wen, Chen, Dongfeng, Chen, Liquan
Format: Article
Language:English
Subjects:
in situ XRD
Na3V2(PO4)3
sodium-ion batteries
storage mechanism
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Summary:A Na3V2(PO4)3/C composite with 3.8 wt.% carbon, which was synthesized by a one‐step solid state reaction, exhibits Na storage capacity of 107 mAh g−1 and high coulombic efficiency of 99.8% in a new NaFSI/PC electrolyte. In situ XRD results reveal its sodium storage mechanism as a typical two‐phase reaction from the Na3V2(PO4)3 to NaV2(PO4)3 phases with 8.26% volume variation. These desired properties make it very promising for application in room‐temperature sodium‐ ion batteries.
ISSN:1614-6832
1614-6840
DOI:10.1002/aenm.201200558