| 锂钒氧化物的液相法合成及电化学性能 |
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| 引用本文： | 刘丽英,田彦文,翟玉春,徐茶清. 锂钒氧化物的液相法合成及电化学性能[J]. 过程工程学报, 2006, 6(4): 670-673 |
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| 作者姓名： | 刘丽英 田彦文 翟玉春 徐茶清 |
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| 作者单位： | 东北大学材料与冶金学院,辽宁,沈阳,110004;东北大学材料与冶金学院,辽宁,沈阳,110004;东北大学材料与冶金学院,辽宁,沈阳,110004;东北大学材料与冶金学院,辽宁,沈阳,110004 |
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| 摘 要： | 采用液相法合成锂离子电池正极材料锂钒氧化物. 通过XRD, TG-DTA分析确定了合成反应的主要历程. 采用XRD及SEM、恒电流充放电、循环伏安测试研究了产物Li1+xV3O8的物理和电化学特征. 结果表明，该法合成的产物为单一相层状结构，颗粒均匀，首次放电容量达288.9 mA×h/g, 15次后仍保持在264.0 mA×h/g，容量保持率为91.38%，充放电效率在95%以上. Li＋在Li1+xV3O8中的嵌入过程是分步进行的.
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| 关 键 词： | 锂离子电池 正极材料 锂钒氧化物 液相反应 合成机理 电化学性能 |
| 文章编号： | 1009-606X（2006）04-0670-04 |
| 收稿时间： | 2005-09-13 |
| 修稿时间： | 2005-11-04 |
Research on Liquid-state Reaction Synthesis and Electrochemical Property of Lithium Vanadium Oxide |
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| LIU Li-ying,TIAN Yan-wen,ZHAI Yu-chun,XU Cha-qing. Research on Liquid-state Reaction Synthesis and Electrochemical Property of Lithium Vanadium Oxide[J]. Chinese Journal of Process Engineering, 2006, 6(4): 670-673 |
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| Authors: | LIU Li-ying TIAN Yan-wen ZHAI Yu-chun XU Cha-qing |
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| Affiliation: | Institute of Materials & Metallurgy, Northeastern University |
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| Abstract: | Lithium vanadium oxide was synthesized by a liquid-state reaction method.The main reaction mechanism was determined by XRD and TG-DTA analysis.Physical characteristics and electrochemical performances of Li1+xV3O8 were investigated by XRD,SEM,galvanostatic charge-discharge and cyclic voltammogram tests.The results indicated that the as-synthesized material had pure layered structure and was evengranular.A maximum reversible capacity of 288.9 mA-h/g for the first cycle and 264.0 mA-h/g after 15 cycles were obtained and charge-discharge efficiency was above 93.84%.Insertion of Li + in Li1+xV3O8 proceeded step by step. |
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| Keywords: | lithium-ion battery , cathode material lithium vanadium oxide liquid-state reaction reaction mechanism electrochemical property |
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