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• 作者：Cuixia Cheng ; Fang Chen ; Huiyang Yi
• 关键词：Lithium ; ion batteries ; lithium cobalt ; nickelate and iron compounds ; rheological method
• 刊名：Journal of Electronic Materials
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：44
• 期：10
• 页码：3738-3743
• 全文大小：1,128 KB
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• 作者单位：Cuixia Cheng (1)
  Fang Chen (1)
  Huiyang Yi (1)
  
  1. Hubei Collaborative Innovation Center for Rare Metal Chemistry, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, Hubei, P. R. China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  Electronics, Microelectronics and Instrumentation
  Solid State Physics and Spectroscopy
  
• 出版者：Springer Boston
• ISSN：1543-186X

文摘

A rheological phase method has been successfully applied to synthesize a layered lithium nickel cobalt iron oxide Li(Co_0.5 Ni_0.5)_{1?em class="EmphasisTypeItalic ">y} Fe _y O₂ (0 ?nbsp;y ?nbsp;0.10)_, a promising cathode material of lithium-ion batteries. The impacts of Fe content and reaction conditions on the material structure are characterized by means of x-ray diffraction, scanning electron microscopy and transmission electron microscopy. Electrochemical properties are investigated in detail under different conditions as cathode materials of lithium-ion batteries. It is found that the average sizes of the prepared powders are about 100 nm. Compared to other samples, Li(Co_0.5Ni_0.5)_0.95Fe_0.05O₂ shows the lowest cation mixing, the smallest impedance, the best reversible capacity and cycling performance. The initial discharge capacity is 146.9 mAhg? in 3.0-.3 V. The cyclability is better after several cycles, which shows great prospects for use in lithium-ion batteries. Keywords Lithium-ion batteries lithium cobalt-nickelate and iron compounds rheological method