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Zelang Jian, Wenze Han, Xia Lu, Huaixin Yang, Yong-Sheng Hu, Jing Zhou, Zhibin Zhou, Jianqi Li, Wen Chen, Dongfeng Chen and Liquan Chen Superior Electrochemical Performance and Storage Mechanism of Na3V2(PO4)3 Cathode for Room-Temperature Sodium-Ion Batteries Advanced Energy Materials 3

Version of Record online: 23 OCT 2012 | DOI: 10.1002/aenm.201200558

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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.

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