| Surface modification of spherical LiNi1/3Co 1/3 Mn1/3O2 with Al2O3 using heterogeneous nucleation process |
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| 引用本文： | 杨志 李新海 王志兴 朱勇军. Surface modification of spherical LiNi1/3Co 1/3 Mn1/3O2 with Al2O3 using heterogeneous nucleation process[J]. 中国有色金属学会会刊, 2007, 17(6): 1319-1323. DOI: 10.1016/S1003-6326(07)60269-6 |
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| 作者姓名： | 杨志 李新海 王志兴 朱勇军 |
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| 作者单位： | School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China |
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| 摘 要： |
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| 关 键 词： | 锂离子电池 LiNi1/3Co1/3Mn1/3O2 异类成核 三氧化二铝涂层 |
| 收稿时间： | 2007-07-15 |
| 修稿时间： | 2007-07-15 |
Surface modification of spherical LiNi1/3Co1/3Mn1/3O2 with A12O3 using heterogeneous nucleation process |
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| Zhi YANG, Xin-hai LI, Zhi-xing WANG,Yong-jun ZHU. Surface modification of spherical LiNi1/3Co1/3Mn1/3O2 with A12O3 using heterogeneous nucleation process[J]. Transactions of Nonferrous Metals Society of China, 2007, 17(6): 1319-1323. DOI: 10.1016/S1003-6326(07)60269-6 |
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| Authors: | Zhi YANG Xin-hai LI Zhi-xing WANG Yong-jun ZHU |
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| Affiliation: | School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China |
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| Abstract: | To improve the cycle stability at high voltage and high charge/discharge rate, spherical LiNi1/3Co1/3Mn1/3O2 was coated with Al2O3 by using heterogeneous nucleation process, and the physical and electrochemical properties were studied. The SEM images show that there is a uniform coating on the modified spherical LiNi1/3Co1/3Mn1/3O2. The electrochemical tests indicate that the properties of LiNi1/3Co1/3Mn1/3O2 coated with 0.5% aluminum oxide are the best. The initial capacities are 150 and 173 mA.h/g at the rate of I C in the voltage range of 2.7-4.3 V and 2.7-4.6 V, respectively, and the discharge capacities maintain about 99% and 85% after 30 cycles, respectively. While those of the bare LiNi1/3Co1/3Mn1/3O2 are only 90% and 75%, respectively. The CV tests of LiNi1/3Co1/3Mn1/3O2 show that Al203-coating can restrain the oxide-reduction peak currents fading during the charge/discharge course. |
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| Keywords: | Li-ion battery LiNi1/3Co1/3Mn1/3O2,heterogeneous nucleation Al2O3-coated |
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