Ionothermal synthesis and enhanced electrochemical performance of nanostructure Cr-doped LiMn2O4 for lithium-ion batteries

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• 作者：Xueliang Li ; Qiao Zhou ; Hongliu Wang ; Shuai Liu
• 关键词：Ionothermal ; Nanostructure ; Cr ; doped LiMn2O4 ; Electrochemical performance
• 刊名：Ionics
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：21
• 期：6
• 页码：1517-1523
• 全文大小：2,252 KB
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  26.Xiao L, Zhao Y, Y
• 作者单位：Xueliang Li (1) (2)
  Qiao Zhou (1) (2)
  Hongliu Wang (1) (2)
  Shuai Liu (1) (2)
  
  1. School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, People’s Republic of China
  2. Anhui Key Laboratory of Controllable Chemical Reaction and Material Chemistry and Chemical Engineering, Hefei, 230009, People’s Republic of 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

LiCr _x Mn_{2?em class="EmphasisTypeItalic">x} O₄ (x--, 0.02, 0.05, 0.12) materials were effectively synthesized by imidazolium-based ionic liquid as reaction medium at ambient pressure. The morphologies of Cr-doped LiMn₂O₄ via calcination were characterized by scanning electron microscopy (SEM). SEM reveals that the LiCr_0.12Mn_1.88O₄ sample has regular nanostructure and a uniform particle size of 50-00?nm. Among the four samples prepared in ionic liquid, the charge/discharge tests indicate that LiCr_0.12Mn_1.88O₄ presents the best performance of rate capacity and cycle stability. A typical LiCr_0.12Mn_1.88O₄ delivers the initial discharge capacity of 129.6?mAh?g? and behaves a quite slow capacity fading with 96.8?% of initial capacity remained after 200?cycles at 0.5?C in the voltage range of 3.4-.3?V. The improved electrochemical performance can be attributed to Cr doping and recyclable ionothermal method. Furthermore, this ionothermal synthesis is believed to provide a new reaction route for lithium-ion battery materials with mild reaction conditions.