CoFe₂O₄/C composite fibers as anode materials for lithium-ion batteries with stable and high electrochemical performance

详细信息	查看全文 | 推荐本文 |

• 作者：Lijuan Wu^a ; ^b ; Qizhen Xiao^a ; ^b ; ^{qizhenxiao2004@yahoo.com.cn} ; Zhaohui Li^a ; Gangtie Lei^a ; Ping Zhang^b ; ^{zhangp@xtu.edu.cn} ; Li Wang^a
• 关键词：Nanoparticles ; Lithium ion batteries ; Composite materials ; Electrospinning ; Cobalt ferrite
• 刊名：Solid State Ionics
• 出版年：2012
• 期刊代码：96_01672738
• 类别：ch
• 出版时间：14 May, 2012
• 卷：215
• 期：Complete
• 页码：24-28
• 文件大小：820 K

摘要

CoFe₂O₄/C composite fibers as anode materials for lithium-ion batteries are prepared by thermal annealing of PAN/PMMA/FeAA/CoAA fibers fabricated using the electrospinning technique. X-ray diffraction, scanning electron microscopy, and galvanostatic cell cycling are employed to characterize the structure and electrochemical performance of the as-prepared CoFe₂O₄/C fibers. SEM images show that the interconnected irregular pores can be found in the fibers. TEM image shows that CoFe₂O₄ nanoparticles with a diameter of about 42 nm are well dispersed in the carbon matrix. The electrochemical results show that the CoFe₂O₄/C composite fibers display a stable and reversible capacity of over 490 mAh g^鈭?#xA0;1 after 700 cycles at a rate of 2.0 C and good rate capability. The experimental results suggest that the CoFe₂O₄/C fibers synthesized by this method are a promising anode material for high energy-density lithium-ion batteries.