Controllable synthesis of Co-doped spinel LiMn2O4 nanotubes as cathodes for Li-ion batteries

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• 作者：Li-Xin Zhang (1)
  Yuan-Zhong Wang (1)
  Hong-Fang Jiu (2)
  Ya-Lei Wang (1)
  Yi-Xin Sun (1)
  Zhenzhong Li (3)
  
• 关键词：Li ; ion batteries ; Co ; doped LiMn2O4 ; cathodes ; electrochemical properties
• 刊名：Electronic Materials Letters
• 出版年：2014
• 出版时间：March 2014
• 年：2014
• 卷：10
• 期：2
• 页码：439-444
• 全文大小：803 KB
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• 作者单位：Li-Xin Zhang (1)
  Yuan-Zhong Wang (1)
  Hong-Fang Jiu (2)
  Ya-Lei Wang (1)
  Yi-Xin Sun (1)
  Zhenzhong Li (3)
  
  1. Department of Chemical Engineering and Environment, North University of China, Taiyuan, 030051, People’s Republic of China
  2. Department of Chemistry, North University of China, Taiyuan, 030051, People’s Republic of China
  3. Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan, 030051, People’s Republic of China
  
• ISSN：2093-6788

文摘

Spinel Co-LiMn2O4 nanotubes have been synthesized via solid state reaction using α-MnO2 nanotubes as selft-emplates. The as-prepared powders were investigated by XRD, TEM, and galvanostatic discharge/charge analysis. The optimal doping amount was confirmed by galvanostatic charge/discharge measurements. The results indicate that about 67% of initial capacity (115 mAh/g) of LiMn2O4 nanotubes can be retained after 50 cycles. For Co-LiMn2O4 nanotubes, the initial reversible capacity is 126.6 mAh/g and 100 mAh/g can be maintained after 50 cycles. The capacitance retention rate of Co-LiMn2O4 nanotubes is as high as 79%. These results indicate that the doping Co can effectively improve circle stability and electrochemical performance of LiMn2O4 nanotubes.