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2006 , Vol. 21 >Issue 5: 1097 - 1102

DOI: https://doi.org/10.3724/SP.J.1077.2006.01097

研究论文

锂离子电池正极材料Li3V2(PO4)3的制备及性能研究

  • 应皆荣 ,
  • 高剑 ,
  • 姜长印 ,
  • 李维 ,
  • 唐昌平
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  • 清华大学核能与新能源技术研究院, 北京 102201

收稿日期: 2005-10-19

  修回日期: 2005-12-12

  网络出版日期: 2006-09-20

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Preparation and Characterization of Li3V2(PO4)3 Cathode Material for Lithium Ion Batteries

  • YING Jie-Rong ,
  • GAO Jian ,
  • JIANG Chang-Yin ,
  • LI Wei ,
  • TANG Chang-Ping
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  • Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 102201, China

Received date: 2005-10-19

  Revised date: 2005-12-12

  Online published: 2006-09-20

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摘要

单斜结构的Li3V2(PO4)3是很有前途的聚阴离子型锂离子电池正极材料. 将一定配比的LiOH H2O、V2O5、H3PO4和蔗糖(C12H22O11)通过球磨均匀混合, 在氮气保护下于800℃焙烧16h, 通过碳热还原合成了Li3V2(PO4)3. 用X射线衍射和扫描电镜分析对材料的结构和形貌进行了表征. 充放电测试表明, 在电压范围为3.0~4.3V和3.0~4.8V时, Li3V2(PO4)3正极材料具有较高的比容量、优良的循环性能和倍率特性. 在电压范围为1.5~4.8V时, Li3V2(PO4)3正极材料具有很高的比容量, 但循环性能较差.

关键词： 锂离子电池; 正极材料; Li3V2(PO4)3

本文引用格式

应皆荣 , 高剑 , 姜长印 , 李维 , 唐昌平 . 锂离子电池正极材料Li3V2(PO4)3的制备及性能研究[J]. 无机材料学报, 2006 , 21(5) : 1097 -1102 . DOI: 10.3724/SP.J.1077.2006.01097

Abstract

Monoclinic lithium vanadium phosphate Li3V2(PO4)3 is a very promising polyanion-type cathode material for lithium ion batteries. In this work, LiOH·H2O, V2O5, H3PO4 and sucros(C12H22O11) were homogeneously mixed with certain molar ratios by ball-milling, and then sintered at 800℃ for 16h in N2. The Li3V2(PO4)3 powders were finally synthesized via carbothermal reduction process. The structure and morphology of Li3V2(PO4)3 powders were characterized by XRD and SEM. At charge-discharge cut-off voltages of 3.0-4.3V and 3.0-4.8V, the material shows rather high specific capacity, excellent cycling performance and rate capability. At charge-discharge cut-off voltages of 1.5-4.8V, the material shows very high specific capacity but poor cycling performance.

Key words： lithium ion batteries; cathode material; Li3V2(PO4)3

参考文献

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