| 富锂掺杂Li1.06Co0.05Cr0.1Mn1.85O4的合成及电化学性能研究 |
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| 引用本文： | 高媛,赖琼钰,韦旎妮,胡向贵,卢集政,李月峰.富锂掺杂Li1.06Co0.05Cr0.1Mn1.85O4的合成及电化学性能研究[J].无机化学学报,2005,21(5):778-782. |
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| 作者姓名： | 高媛 赖琼钰 韦旎妮 胡向贵 卢集政 李月峰 |
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| 作者单位： | 四川大学化学学院,成都,610064 |
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| 基金项目： | 教育部博士点基金资助项目(No.20020610027)。 |
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| 摘 要： | 锂离子电池具有比能量高、功率大、使用寿命长、无记忆效应、性能价格比高等优点,从而成为可充式电源的主要选择对象.锰由于资源丰富、价廉、环境友好等优点,使锰酸锂(LiMn2O4)成为最有希望取代钴酸锂的正极材料.但锰酸锂的放电容量相对较低,结构欠稳定,容量衰减严重,作为正极材料还无法与钴酸锂相比,近年来做了大量的研究工作以改善它的电化学性能1～6].最近Youngjoon Shin等研究发现7]用少量的Li与Ni共同替代LiMn2O4中的Mn得到的LiMn2-2yLiyNiyO4的电化学性能要优于单元素替代的LiMn2-xMxO4(M=Li,Cr,Fe,Co,Ni)的电化学性能.
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| 关 键 词： | 锂离子电池 Li1.06Co0.05Cr0.1Mn1.85O4 硝尿配合物 掺杂 电化学性能 |
| 文章编号： | 1001-4861(2005)05-0778-05 |
| 收稿时间： | 2004/11/15 0:00:00 |
| 修稿时间： | 2004年11月15 |
Synthesis and Characterization of Lithium-rich Li1.06Co0.05Cr0.1Mn1.85O4 Powders |
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| GAO Yuan,LAI Qiong-Yu,WEI Ni-Ni,HU Xiang-Gui,LU Ji-Zheng and LI Yue-Feng.Synthesis and Characterization of Lithium-rich Li1.06Co0.05Cr0.1Mn1.85O4 Powders[J].Chinese Journal of Inorganic Chemistry,2005,21(5):778-782. |
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| Authors: | GAO Yuan LAI Qiong-Yu WEI Ni-Ni HU Xiang-Gui LU Ji-Zheng and LI Yue-Feng |
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| Institution: | Department of chemistry, Sichuan University, Chengdu 610064,Department of chemistry, Sichuan University, Chengdu 610064,Department of chemistry, Sichuan University, Chengdu 610064,Department of chemistry, Sichuan University, Chengdu 610064,Department of chemistry, Sichuan University, Chengdu 610064 and Department of chemistry, Sichuan University, Chengdu 610064 |
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| Abstract: | Li1.06Co0.05Cr0.1Mn1.85O4 powders were prepared by heating metal-urea nitrate complexes precursors. The influence of synthesis conditions on the structural and electrochemical properties of Li1.06Co0.05Cr0.1Mn1.85O4 was investigated by X-ray diffraction, scanning electron microscopy and charge-discharge experiments. The powders were well crystallized and with a narrow particle size distribution and regular morphology about 60 nm. Electrochemical performances indicated that Li1.06Co0.05Cr0.1Mn1.85O4 delivered a high capacity of 191 mAh·g-1 at 14th cycle due to additional 3 V (vs Li) plateau, 145 mAh·g-1 at 22st cycle. The results show that there are two pairs of voltammetric wave (centered at 4 V (vs Li)) and a pairs of voltammetric wave (centered at 3 V (vs Li)), indicating an excellent reversibility. |
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| Keywords: | Li-ion battery spinal Li1 06Co0 05Cr0 1Mn1 85O4 metal-urea nitrate complexes doping electrochemical performance |
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