| 氨蒸发诱导法制备纳米结构LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2及其作为高功率型锂离子电池正极材料的性能 |
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| 作者单位： | 1. Phosphorus Resources Comprehensive Utilization & Clean Processing Center of Ministry of Education, School of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China;
2. School of Materials Science and Engineering, Sichuan University, Chengdu 610065, P. R. China;
3. State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China |
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| 基金项目： | The project was supported by the Sichuan University Funds for Young Scientists, China (2011SCU11081) and Research Fund for the Doctoral Program of Higher Education, the Ministry of Education, China (20120181120103). |
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| 摘 要： | 采用氨蒸发诱导法成功制备出纳米结构LiNi1/3Co1/3Mn1/3O2正极材料,借助X射线衍射(XRD)分析、扫描电镜(SEM)、透射电镜(TEM)、高分辨率透射电镜(HRTEM)、能量分散谱(EDS)和比表面测试等表征手段及恒电流充放电测试研究了其晶体结构、微观形貌和电化学性能.研究表明该方法制备出的材料具有良好的α-NaFeO2层状结构,阳离子混排程度低.纳米片交错堆积而成核桃仁状形貌,片与片之间形成许多纳米孔,而且纳米片的侧面属于{010}活性面,能够提供较多的锂离子的脱嵌通道.在室温下及3.0-4.6 V充放电范围内,该材料在电流密度为0.5C、1C、3C、5C和10C时放电比容量分别为172.90、153.95、147.09、142.16和131.23mAh?g-1.说明其具有优异的电化学性能,非常有潜力用于动力汽车等高功率密度锂离子电池中.
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| 关 键 词： | 锂离子电池 正极材料 LiNi1/3Co1/3Mn1/3O2 纳米结构 氨蒸发诱导法 电化学性能 |
| 收稿时间： | 2014-04-23 |
Synthesis of Nanostructured LiNi1/3Co1/3Mn1/3O2 by Ammonia-Evaporation-Induced Synthesis and Its Electrochemical Properties as a Cathode Material for a High-Power Li-Ion Battery |
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| Authors: | HUA Wei-Bo ZHENG Zhuo LI Long-Yan GUO Xiao-Dong LIU Heng SHEN Chong-Heng WU Zhen-Guo ZHONG Ben-He HUANG Ling |
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| Institution: | 1. Phosphorus Resources Comprehensive Utilization & Clean Processing Center of Ministry of Education, School of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China;
2. School of Materials Science and Engineering, Sichuan University, Chengdu 610065, P. R. China;
3. State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China |
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| Abstract: | We report on an ammonia-evaporation-induced synthetic method for nanostructured LiNi1/3Co1/3Mn1/3O2 cathode material. Powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high- resolution transmission electron microscopy (HRTEM), energy- dispersive X- ray spectroscopy (EDS), Brunauer-Emmett-Teller nitrogen sorption, and galvanostatic charge-discharge tests were applied to analyze the crystal structure, micromorphology, and electrochemical properties of nanostructured LiNi1/3Co1/3Mn1/3O2. The results show that it has a well-ordered layered α-NaFeO2 with little cation mixing. Awalnutkernel- like morphology is formed by nanosheets, leading to a nanoporous material. The lateral plane of nanosheets are {010}-faceted, which could provide multiple channels for Li+-ion migration. The electrochemical properties of the lithium cells used this material as cathode are excellent: the specific discharge capacity at 0.5C,1C, 3C, 5C and 10C is, respectively, up to 172.90, 153.95, 147.09, 142.16, and 131.23 mAh·g-1 between 3.0 and 4.6 V at room temperature. These excellent features will make the nanostructured LiNi1/3Co1/3Mn1/3O2 become a positive electrode material of potential interest for useful applications, such as in electric vehicles and hybrid electric vehicles. |
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| Keywords: | Lithium-ion battery Cathode material LiNi1/3Co1/3Mn1/3O2 Nanostructure Ammonia-evaporation-induced synthetic method Electrochemical property |
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