| 层状Li(Ni1/3Co1/3Mn1/3)O2正极材料的合成与电化学性能研究 |
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| 引用本文： | 钟辉,许惠.层状Li(Ni1/3Co1/3Mn1/3)O2正极材料的合成与电化学性能研究[J].化学学报,2007,65(2):147-151. |
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| 作者姓名： | 钟辉 许惠 |
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| 作者单位： | 成都理工大学材料与化学工程学院 成都610059(钟辉)，重庆工商大学环境与生物工程学院 重庆400067(许惠) |
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| 摘 要： | 采用共沉淀-喷雾造粒法制备前驱体, 于750 ℃在空气中煅烧20 h合成出层状Li(Ni1/3Co1/3Mn1/3)O2正极材料, 并用XRD, SEM, 粒度分析和电性能测试考察了所得材料结构、形貌及电化学性能. 本层状Li(Ni1/3Co1/3Mn1/3)O2正极材料具有α-NaFeO2结构, 六方晶系, R3m空间群, 其晶胞参数为a＝0.2865 nm, c＝1.4238 nm. 当材料分别在2.8～4.2, 2.8～4.5 V间进行充放电时, 其首次放电容量分别为173.5和185.4 mAh?g－1, 首次充放电效率分别为90%和83.8%, 40次循环后容量保持率分别为96%和84%.
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| 关 键 词： | 锂离子电池 正极材料 Li(Ni1/3Co1/3Mn1/3)O2 |
| 收稿时间： | 2006-04-14 |
| 修稿时间： | 2006-04-142006-09-14 |
Synthesis and Electrochemical Characterization of Layered Li(Ni1/3Co1/3Mn1/3)O2 Cathode Material |
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| ZHONG Hui,XU Hui.Synthesis and Electrochemical Characterization of Layered Li(Ni1/3Co1/3Mn1/3)O2 Cathode Material[J].Acta Chimica Sinica,2007,65(2):147-151. |
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| Authors: | ZHONG Hui XU Hui |
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| Institution: | 1. College of Material and Chemical Engineering, Chengdu University of Technology, Chengdu 610059;2.Chongqing Technology and Business University, Chongqing 400067 |
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| Abstract: | The precipitate-spray method was used to prepare the precursor. The layered Li(Ni1/3Co1/3Mn1/3)- O2 cathode material for lithium ion batteries was synthesized in air atmosphere at 750 ℃ for 20 h from the precursor. XRD analysis, SEM and electrochemical tests were used to characterize the structure, appearance and electrochemical perform-ances of the aimed material. The hexagonal layered LiNi0.5Mn0.5O2 has an α-NaFeO2 structure and space group R3m with lattice parameters of a＝0.2865 nm, c＝1.4238 nm. Initial discharge capacities of 173.5 and 185.4 mAh?g－1 were obtained in the range 2.8～4.2, 2.8～4.5 V, respectively. 96% and 84% of the initial discharge capacities were reserved af-ter 40 cycles at each charge-discharge voltage. |
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| Keywords: | lithium-ion battery cathode material layered Li(Ni_(1/3)Co_(1/3)Mn_(1/3))O_2 |
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