| 锂离子二次电池正极材料LiVPO4F的制备及其电化学性能的研究 |
| Preparation and Electrochemical Performance of Rechargeable Lithium Battery LiVPO4F Cathode Material |
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| 摘要: |
| 关键词: 锂离子二次电池 正极材料 氟磷酸钒锂 电化学性能 |
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| Abstract: A new cathode material, LiVPO4F, has been synthesized through two steps of solid-state reactions. In the first step, vanadium pentoxide, ammonium dihydrogen phosphate, and a high surface area carbon were pre-heated at 300 ℃ and reacted at 750 ℃ under an inert atmosphere to yield the trivalent vanadium phosphate VPO4. In the second step, the product LiVPO4F was synthesized by the reaction with VPO4 and LiF. The LiVPO4F was characterized by X-ray diffraction, scanning electron microscopy, cyclic voltammetry and charge/discharge testing measurements. The LiVPO4F is triclinic crystalline system. At 0.1 C rate, the first charge/discharge capacities were 150.1 mAh·g-1 and 132.6 mAh·g-1; At 0.2 C rate, the first charge/discharge capacities were 142.9 mAh·g-1 and 125.2 mAh·g-1. The LiVPO4F from this work has higher charge/discharge voltage 4.3 V and 4.1 V, respectively. |
| Keywords: rechargeable lithium ion battery cathode material LiVPO4F electrochemical properties |
| 投稿时间：2005-03-05 修订日期：2005-06-23 |
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| 李宇展,任俊霞,周震,高学平,阎杰.锂离子二次电池正极材料LiVPO4F的制备及其电化学性能的研究[J].无机化学学报,2005,21(10):1597-1600. |
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