Effect of Al-doping on the electrochemical properties of a three-dimensionally porous lithium manganese oxide for lithium-ion batteries

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• 作者：J.L. Wang ; Z.H. Li ; ^{lzh69@xtu.edu.cn} ; J. Yang ; J.J. Tang ; J.J. Yu ; W.B. Nie ; G.T. Lei ; Q.Z. Xiao
• 关键词：Lithium manganese oxide ; Aluminum doping ; Electric vehicles ; Lithium-ion batteries
• 刊名：Electrochimica Acta
• 出版年：2012
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：30 July, 2012
• 卷：75
• 期：Complete
• 页码：115-122
• 文件大小：2137 K

摘要

In this work, three-dimensionally porous spinel-type lithium manganese oxides were prepared by a phase-inversion technology using poly(methyl methacrylate) (PMMA) as the template and followed by annealing at a high temperature. The morphology was observed on scanning electron microscopy and transmission electron microscopy, and the crystal structure was determined from the X-ray diffraction pattern. Effect of Al-doping on the electrochemical properties of the product was studied by cyclic voltammetry and galvanostatic charge-discharge measurements. LiAl_0.1Mn_1.9O₄ (LAMO) displays better rate and cycling capabilities than the pristine LiMn₂O₄ (LMO) at room temperature. It also exhibits an enhanced cycling performance at 55 掳C due to doping with Al. The results suggest that the obtained LAMO could develop into a promising cathode material for lithium-ion batteries.