Synthesis, characterization, and electrochemical properties of Li2Mn1-x Fe x (PO3)4 cathode material for lithium-ion batteries

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• 作者：Danlin Yan ; Yanming Zhao ; Youzhong Dong…
• 关键词：Li ; ion batteries ; Cathode material ; Fe substitution ; Solid solutions
• 刊名：Journal of Solid State Electrochemistry
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：20
• 期：2
• 页码：337-344
• 全文大小：2,582 KB
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• 作者单位：Danlin Yan (1)
  Yanming Zhao (1) (2)
  Youzhong Dong (1)
  Zhiyong Liang (1)
  Xinghao Lin (1)
  
  1. School of Material Science and Engineering, South China University of Technology, Guangzhou, 510640, China
  2. School of Physics, South China University of Technology, Guangzhou, 510640, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Analytical Chemistry
  Industrial Chemistry and Chemical Engineering
  Characterization and Evaluation Materials
  Condensed Matter
  Electronic and Computer Engineering
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1433-0768

文摘

Li₂Mn_1-x Fe _x (PO₃)₄ (x = 0, 0.2, 0.4, 0.6, 0.7) solid solution phase has been successfully prepared via solid-state reaction. The Rietveld refinement results indicate that the Li₂Mn_1-x Fe _x (PO₃)₄ (x = 0, 0.2, 0.4, 0.6, 0.7) solid solutions with orthorhombic structure can be obtained and the lattice parameters (including a, b, c, and V) decrease with the increasing of Fe concentration. Partial substitution of manganese with iron enhances the electrochemical performance; there, the discharge-specific capacity of the samples obviously increases from 21 mAh/g for x = 0 to 59 mAh/g for x = 0.7, which is 85 % capacity of that one lithium removal. The cyclic voltammetric (CV) curves present the Mn2+/Mn3+ redox couple situated at 4.6 and 1.8 V and Fe2+/Fe3+ redox couple located at 4.3 and 2.3 V, which can be observed in cathodic and anodic sweeps. Such a low discharge potential value for M2+/M3+ redox couple may be attributed to the zigzag [(PO₃)1−] _n chains in this structure. Keywords Li-ion batteries Cathode material Fe substitution Solid solutions