Carbon coated Na3V2(PO4)3 as novel electrode material for sodium ion batteries

✍ Scribed by Zelang Jian; Liang Zhao; Huilin Pan; Yong-Sheng Hu; Hong Li; Wen Chen; Liquan Chen

• Book ID: 113595958
• Publisher: Elsevier Science
• Year: 2012
• Tongue: English
• Weight: 747 KB
• Volume: 14
• Category: Article
• ISSN: 1388-2481
• DOI: 10.1016/j.elecom.2011.11.009

✦ Synopsis

A Na3V2(PO4)3 sample coated uniformly with a layer of 6nm carbon has been successfully synthesized by a one-step solid state reaction. This material shows two flat voltage plateaus at 3.4V vs. Na+/Na and 1.63V vs. Na+/Na in a nonaqueous sodium cell. When the Na3V2(PO4)3/C sample is tested as a cathode in a voltage range of 2.7–3.8V vs. Na+/Na, its initial charge and discharge capacities are 98.6 and 93mAh/g. The capacity retention of 99% can be achieved after 10 cycles. The electrode shows good cycle performance and moderate rate performance. When it is tested as an anode in a voltage range of 1.0–3.0V vs. Na+/Na, the initial reversible capacity is 66.3mAh/g and the capacity of 59mAh/g can be maintained after 50 cycles. These preliminary results indicate that Na3V2(PO4)3/C is a new promising material for sodium ion batteries.