Nano-structured Li₃V₂(PO₄)₃/carbon composite for high-rate lithium-ion batteries

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• 作者：Anqiang Pan ; Jun Liu ; Ji-Guang Zhang ; Wu Xu ; Guozhong Cao ; Zimin Nie ; Bruce W. Arey ; Shuquan Liang
• 关键词：Li-ion batteries ; Cathode ; Vanadium phosphate ; Li₃V₂(PO₄)₃ ; High-power battery
• 刊名：Electrochemistry Communications
• 出版年：2010
• 出版时间：December 2010
• 年：2010
• 卷：12
• 期：12
• 页码：1674-1677
• 全文大小：723 K

文摘

Nano-structured Li₃V₂(PO₄)₃/carbon composite (Li₃V₂(PO₄)₃/C) has been successfully prepared by incorporating the precursor solution into a highly mesoporous carbon with an expanded pore structure. X-ray diffraction analysis, scanning electron microscopy, and transmission electron microscopy were used to characterize the structure of the composites. Li₃V₂(PO₄)₃ had particle sizes of < 50 nm and was well dispersed in the carbon matrix. When cycled within a voltage range of 3 to 4.3 V, a Li₃V₂(PO₄)₃/C composite delivered a reversible capacity of 122 mA h g^− 1 at a 1C rate and maintained a specific discharge capacity of 83 mA h g^− 1 at a 32C rate. These results demonstrate that cathodes made from a nano-structured Li₃V₂(PO₄)₃ and mesoporous carbon composite material have great potential for use in high-power Li-ion batteries.