| 锂离子二次电池正极材料LiAlyCo0.2Ni0.8-yO2的合成及其电化学性能研究 |
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| 引用本文： | 江卫军,其 鲁,柯 克,王银杰,晨 晖. 锂离子二次电池正极材料LiAlyCo0.2Ni0.8-yO2的合成及其电化学性能研究[J]. 无机化学学报, 2003, 19(12): 1280-1284 |
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| 作者姓名： | 江卫军 其 鲁 柯 克 王银杰 晨 晖 |
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| 作者单位： | 北京大学化学与分子工程学院应用化学系新能源材料与技术实验室,北京,100871 |
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| 摘 要： | 用固相反应法合成了锂离子二次电池正极材料LiAlyCo0.2Ni0.8-yO2(y=0,0.001,0.005,0.01,0.03),采用XRD、SEM、ICP-AES、差分计时电位法和充放电循环等对合成的材料的物理化学性质以及电化学性能进行了测试分析。结果表明所合成的产物均为α-NaFeO2型的层状结构,产物无杂质相,产物的表面形貌规则,颗粒大小均匀。实验结果证明经过Al掺杂后的材料的放电电压平台有所提高,容量也有所上升。并且随着Al含量的增加,材料在电化学充放电过程的结构稳定性在上升,因此电化学稳定性得到了提高。实验结果还表明低含量Al元素的掺杂既提高了LiNi0.8Co0.2O2的放电容量,又提高了其循环可逆性,使材料的容量保持率显著提高。
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| 关 键 词： | 锂离子二次电池 正极材料 LiNi0.8Co0.2O2 Al掺杂 |
| 修稿时间： | 2003-06-24 |
Preparation and Electrochemical Properties Studies of Al-doped LiNi0.8Co0.2O2 Cathode Materials |
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| JIANG Wei-Jun,QI Lu,KE Ke,WANG Yin-Jie and CHEN Hui. Preparation and Electrochemical Properties Studies of Al-doped LiNi0.8Co0.2O2 Cathode Materials[J]. Chinese Journal of Inorganic Chemistry, 2003, 19(12): 1280-1284 |
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| Authors: | JIANG Wei-Jun QI Lu KE Ke WANG Yin-Jie CHEN Hui |
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| Affiliation: | New Energy Materials and Technology Laboratory, Department of Applied Chemistry, Peking University, Beijing 100871,New Energy Materials and Technology Laboratory, Department of Applied Chemistry, Peking University, Beijing 100871,New Energy Materials and Technology Laboratory, Department of Applied Chemistry, Peking University, Beijing 100871,New Energy Materials and Technology Laboratory, Department of Applied Chemistry, Peking University, Beijing 100871 and New Energy Materials and Technology Laboratory, Department of Applied Chemistry, Peking University, Beijing 100871 |
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| Abstract: | |
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| Keywords: | lithium-ion batteries cathode material LiNi0.8Co0.2O2 Al-dopant |
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