新型锂离子电池负极材料Li_(1.1)VO_2的合成和电化学性能  

Synthesis and Electrochemical Performance of Lithium-Ion Battery Anode Materials of Li_(1.1)VO_2

作　　者：陈晗[1] 刘建华[1] 向楷雄[1] 龚文强[1] 张淑英[1] 

机构地区：[1]湖南工业大学冶金工程学院,湖南株洲412007

出　　处：《湖南工业大学学报》2011年第3期21-24,共4页Journal of Hunan University of Technology

基　　金：湖南省自然科学基金资助项目(09JJ5010)

摘　　要：采用高温固相反应法合成了新型锂离子电池负极材料Li1.1VO2。用X射线衍射仪、扫描电子显微镜和恒电流充放电法研究了不同温度下合成的Li1.1VO2试样的结构、形貌和电化学性能。实验结果表明:1 100℃下合成的Li1.1VO2试样结构完整、颗粒大小均匀,具有最佳的电化学性能。在0.1C、1C倍率下,放电容量分别为313.2,210.5 mA.h/g;在1C倍率下,经过50次循环后,放电容量保持率高达95.45%。New Li1.1VO2 anode materials were synthesized successfully by high temperature solid-state reaction.The microstructure,morphology and electrochemical performance of Li1.1VO2 synthesized under various temperature were investigated by X-ray diffraction,scanning electron microscopic and galvanostatic charge and discharge tests.The experimental results show that Li1.1VO2 synthesized at 1 100 ℃ possesses perfect microstructure,uniform grains and the best electrochemical performance.The discharge capacities are 313.2 and 210.5 mA·h/g at 0.1 C and 1 C,respectively.The retention of discharge capacity is 94.45% at 1C rate after 50 cycles.

关 键 词：锂离子电池 负极材料 Li1.1VO2 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动]