| 多元掺杂尖晶石锰酸锂LiCo0.02La0.01Mn1.97O3.98Cl0.02的电化学性质研究 |
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| 引用本文： | 卢星河,张广清,马楠,韩冬. 多元掺杂尖晶石锰酸锂LiCo0.02La0.01Mn1.97O3.98Cl0.02的电化学性质研究[J]. 中山大学学报(自然科学版), 2009, 48(Z2) |
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| 作者姓名： | 卢星河 张广清 马楠 韩冬 |
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| 作者单位： | 1. 淮海工学院化工学院,江苏,连云港,222005;河北工程大学理学院,河北,邯郸,056038
2. 河北工程大学理学院,河北,邯郸,056038 |
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| 摘 要： | 采用高温固相浸渍法合成了多元复合掺杂的尖晶石锰酸锂正极材料LiCo0.02La0.01Mn1.97O3.98Cl0.02.采用X衍射分析仪、扫描电镜、马尔文激光粒径分析仪、电化学工作站以及充放电分析仪等设备表征了材料的电化学性能与特性.XRD表明所合成的材料具有良好的尖晶石型结构特征,所掺杂是元素Co,La分别占据了元素Mn的位置,元素Cl占据了元素O的位置.合成材料LiCo0.02La0.01Mn1.97O3.98Cl0.02比材料LiMn2O4有更好的电化学特性,150次循环后的比容量保持率在91.7%.
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| 关 键 词： | 锂离子电池 尖晶石锰酸锂 多元掺杂 电化学性能 |
Study on Electrochemical Performance of Multidoped Spinel LiCo0.02La0.01Mn1.97O3.98Cl0.02 |
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| LU Xinghe,ZHANG Guangqing,MA Nan,HAN Dong. Study on Electrochemical Performance of Multidoped Spinel LiCo0.02La0.01Mn1.97O3.98Cl0.02[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2009, 48(Z2) |
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| Authors: | LU Xinghe ZHANG Guangqing MA Nan HAN Dong |
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| Abstract: | The cathode material LiCo0.02La0.01Mn1.97O3.98Cl0.02 muhidoped spinel has been synthesized by solid-state method. The structure and electrochemical performance are characterized by XRD, SEM, particle size distribution analysis, cycling charge-discharge and electrochemical impedance spectroscopy. XRD patterns show that sample exhibits pure spinel phase. The substitution of Co, La for Mn and CI for O in the LiMn2O4 stabilizes the structural integrity of the spinel host. The results of the charge-discharge curves showed that LiCo0.02La0.01Mn1.97O3.98Cl0.02 has better electrochemical performance than that un-doped material LiMn2O>4. The cycle perform-ance has been improved that the capacity of the electrode maintains 91.7% of the initial capacity at 150th cycle. |
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| Keywords: | Lithium-ion cells lithium manganese oxide spinel multidoped electrochemical properties |
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