| LiAl0.05Mn1.95O4正极材料锂离子嵌脱动力学研究 |
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| 引用本文： | 朱彦荣,伊廷锋,岳彩波,诸荣孙,左朋建.LiAl0.05Mn1.95O4正极材料锂离子嵌脱动力学研究[J].哈尔滨工业大学学报,2009,41(3):165-168. |
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| 作者姓名： | 朱彦荣 伊廷锋 岳彩波 诸荣孙 左朋建 |
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| 作者单位： | 朱彦荣,伊廷锋,岳彩波,诸荣孙,ZHU Yan-rong,YI Ting-feng,YUE Cai-be,ZHU Rong-sun(安徽工业大学,化学与化工学院,安徽,马鞍山,243002);左朋建,ZUO Peng-jian(哈尔滨工业大学,应用化学系,哈尔滨,150001)
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| 摘 要： | 采用超声辅助溶胶凝胶法成功制备了LiAl0.05Mn1.95O4正极材料,并利用循环伏安和电化学阻抗谱研究了不同合成方法对LiAl0.05Mn1.95O4正极材料锂离子嵌脱动力学的影响.结果表明:超声辅助溶胶凝胶法制备的尖晶石材料具有更好的可逆性和最小的电荷转移电阻;LiMn2O4(sol-gel)、LiAl0.05Mn1.95O4(sol-gel)和LiAl0.05Mn1.95O4(UASG)的交换电流密度分别为2.57×10-2、4.16×10-2、5.08×10-2mA.cm-2,固相锂离子扩散系数分别为3.27×10-10、4.94×10-10、6.91×10-10cm2.s-1,表明超声辅助溶胶凝胶法制备的样品具有较好的锂离子嵌脱动力学.
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| 关 键 词： | 锂离子电池 LiAl0.05Mn1.95O4 动力学 电化学阻抗谱 |
Kinetics of lithium ion insertion-extraction for LiAl0.05Mn1.95O4 cathode material |
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| ZHU Yan-rong,YI Ting-feng,YUE Cai-be,ZHU Rong-sun,ZUO Peng-jian.Kinetics of lithium ion insertion-extraction for LiAl0.05Mn1.95O4 cathode material[J].Journal of Harbin Institute of Technology,2009,41(3):165-168. |
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| Authors: | ZHU Yan-rong YI Ting-feng YUE Cai-be ZHU Rong-sun ZUO Peng-jian |
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| Affiliation: | 1.School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan 243002,China;2.Dept.of Applied Chemistry,Harbin Institute of Technology,Harbin 150001,China) |
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| Abstract: | LiAl0.05Mn1.95O4 cathode material was successfully synthesized by ultrasonic-assisted sol-gel method(UASG),and the effect of different synthesis methods on kinetics of lithium ion insertion-extraction for LiAl0.05Mn1.95O4 cathode material was investigated by cyclic voltammogram(CV) and electrochemical impedance spectroscopy(EIS).The result shows that spinel material synthesized by UASG method has a higher reversibility and the lowest charge transfer resistance;the exchange current densities of LiMn2O4(sol-gel),LiAl0.05Mn1.95O4(sol-gel) and LiAl0.05Mn1.95O4(UASG) are 2.57×10-2,4.16×10-2 and 5.08×10-2 mA·cm-2,and their solid phase diffusion coefficients of lithium ions are 3.27×10-10,4.94×10-10 and 6.91×10-10cm2·s-1,respectively.It indicates that the sample synthesized by UASG method has better kinetics of lithium ion insertion-extraction. |
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| Keywords: | LiAl0 05Mn1 95O4 |
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