Enhanced electrochemical performance of Cu2O-modified Li4Ti5O12 anode material for lithium-ion batteries

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• 作者：Junsheng Wang ; Fei Zhao ; Jie Cao ; Yu Liu ; Baofeng Wang
• 关键词：Cu2O modification ; Li4Ti5O12 ; Lithium ; ion battery ; Electrochemical performance
• 刊名：Ionics
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：21
• 期：8
• 页码：2155-2160
• 全文大小：1,019 KB
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• 作者单位：Junsheng Wang (1)
  Fei Zhao (1)
  Jie Cao (1)
  Yu Liu (1) (2)
  Baofeng Wang (1)
  
  1. Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai, 200090, China
  2. CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, CAS, Shanghai, 200050, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Materials Science
  Physical Chemistry
  Condensed Matter
  Renewable Energy Sources
  Electrical Power Generation and Transmission
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1862-0760

文摘

Li4Ti5O12/Cu2O composite was prepared by ball milling Li4Ti5O12 and Cu2O with further heat treatment. The structure and electrochemical performance of the composite were investigated via X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge–discharge tests. Li4Ti5O12/Cu2O composite exhibited much better rate capability and capacity performance than pristine Li4Ti5O12. The discharge capacity of the composite at 2 C rate reached up to 122.4 mAh g? after 300?cycles with capacity retention of 91.3?%, which was significantly higher than that of the pristine Li4Ti5O12 (89.6 mAh g?). The improvement can be ascribed to the Cu2O modification. In addition, Cu2O modification plays an important role in reducing the total resistance of the cell, which has been demonstrated by the electrochemical impedance spectroscopy analysis.