| Powder electrochemical properties with different particle sizes of spinel LiAl0.05Mn1.95O4 synthesized by sol-gel method |
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| 作者姓名： | YI Tingfeng WANG Dianlong GAO Kun HU Xinguo |
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| 作者单位： | [1]Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China [2]School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China |
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| 摘 要： | An Al-doped spinel lithium manganese oxide was prepared by the adipic acid-assisted sol-gel method at 800℃, and the cathode materials （Liml0.05Mnl.9504） with different particle sizes were obtained through ball milling. The effects of particle size on the electrochemical performance of LiAl0.05Mnl.9504 samples were investigated by differential thermal analysis and thermogravimetry, X-ray diffraction, galvanostatic charge-discharge test, cyclic voltammetry, and electrochemical impedance spectroscopy. The results indicate that all samples with different particle sizes show the same pure spinel phase and good crystal structure; LiAlo.osMnl.9504 with Dso = 17.3 μm shows better capacity retention; LiAlo.osMnl.gsO4 cathode materials with small particle size have a bigger resistance of charge transfer than the large one, and the particle size has significant effects on the electrochemical performance of Al-doped spinel LiMn2O4 cathode materials.
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| 关 键 词： | 锂离子电池 LiAl0.05Mn1.95O4 电气化学性质 尖晶石 |
| 收稿时间： | 28 March 2006 |
| 修稿时间： | 2006-03-28 |
Powder electrochemical properties with different particle sizes of spinel LiAl0.05Mn1.95O4 synthesized by sol-gel method |
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| YI Tingfeng WANG Dianlong GAO Kun HU Xinguo.Powder electrochemical properties with different particle sizes of spinel LiAl0.05Mn1.95O4 synthesized by sol-gel method[J].Rare Metals,2007,26(4):330-334. |
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| Authors: | YI Tingfeng WANG Dianlong GAO Kun HU Xinguo |
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| Affiliation: | 1. School of Materials Science and Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea;2. Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea |
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| Abstract: | An Al-doped spinel lithium manganese oxide was prepared by the adipic acid-assisted sol-gel method at 800℃, and the cathode materials (LiAl0.05Mn1.95O4) with different particle sizes were obtained through ball milling. The effects of particle size on the electrochemical performance of LiAl0.05Mn1.95O4 samples were investigated by differential thermal analysis and thermogravimetry, X-ray diffraction, galvanostatic charge-discharge test, cyclic voltammetry, and electrochemical impedance spectroscopy. The results indicate that all samples with different particle sizes show the same pure spinel phase and good crystal structure; LiAl0.05Mn1.95O4 with D50 = 17.3 μm shows better capacity retention; LiAl0.05Mn1.95O4 cathode materials with small particle size have a bigger resistance of charge transfer than the large one, and the particle size has significant effects on the electrochemical performance of Al-doped spinel LiMn2O4 cathode materials. |
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| Keywords: | lithium ion battery LiAl0 05Mn1 95O4 electrochemical properties particle size |
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