| 正极材料LiNi0.8Co0.1Mn0.1O2的合成工艺优化及电化学性能 |
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| 引用本文： | 肖忠良,胡超明,宋刘斌,卢意鹏,刘姣,曾鹏.正极材料LiNi0.8Co0.1Mn0.1O2的合成工艺优化及电化学性能[J].化工学报,2017,68(4):1652-1659. |
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| 作者姓名： | 肖忠良 胡超明 宋刘斌 卢意鹏 刘姣 曾鹏 |
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| 作者单位： | 长沙理工大学化学与生物工程学院, 电力与交通材料保护湖南省重点实验室, 湖南 长沙 410114 |
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| 基金项目： | 国家自然科学基金项目（21501015，21545010，31527803）；中国科学院环境监测STS项目(KFJ-SW-STS-173)；湖南省自然科学基金项目（2016JJ3007）；湖南省科技计划项目（2015GK1046）。 |
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| 摘 要： | 采用高温固相法合成锂离子电池富镍三元材料LiNi0.8Co0.1Mn0.1O2，对其工艺条件进行优化，对产物进行X射线衍射（XRD（，扫描电镜（SEM（以及电化学性能分析。结果表明：在氧气气氛下，锂与金属元素摩尔比为1.05:1、烧结时间15 h、烧结温度750℃为最佳合成工艺条件。按最佳工艺合成的样品在1C首次放电容量高达174.9 mA·h·g-1，50次循环后比容量为158.5 mA·h·g-1，容量保持率为90.62%，表现出良好的循环稳定性。XRD和SEM表征表明，在氧气气氛下烧结的样品有良好的层状结构，阳离子混排程度小，具有较好的类球形，粒径均匀分布在10~20 μm。循环伏安（CV（和电化学阻抗（EIS（结果表明，工艺条件的优化有助于提高正极材料的电化学性能。
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| 关 键 词： | LiNi0.8Co0.1Mn0.1O2 合成 高温固相 电化学 稳定性 锂离子电池 |
| 收稿时间： | 2016-12-29 |
| 修稿时间： | 2016-12-29 |
Optimization for synthesis technology of LiNi0.8Co0.1Mn0.1O2 cathode material and electrochemical performance |
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| XIAO Zhongliang,HU Chaoming,SONG Liubin,LU Yipeng,LIU Jiao,ZENG Peng.Optimization for synthesis technology of LiNi0.8Co0.1Mn0.1O2 cathode material and electrochemical performance[J].Journal of Chemical Industry and Engineering(China),2017,68(4):1652-1659. |
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| Authors: | XIAO Zhongliang HU Chaoming SONG Liubin LU Yipeng LIU Jiao ZENG Peng |
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| Affiliation: | Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, Hunan, China |
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| Abstract: | Ni-rich ternary cathode material LiNi0.8Co0.1Mn0.1O2 for lithium-ion battery was synthesized by a high-temperature solid-state reaction method, and its process conditions were optimized. The structural and morphological features of LiNi0.8Co0.1Mn0.1O2 cathode material prepared were investigated with X-ray diffraction and scanning electron microscopy. Its electrochemical properties were analyzed. The results showed that under the oxygen atmosphere, the molar ratio of lithium to metal elements was 1.05:1, the sintering time was 15 h and the sintering temperature was 750℃, the optimal synthesis conditions were obtained. The initial discharge capacity of the sample was 174.9 mA·h·g-1 at 1C, the specific capacity was 158.5 mA·h·g-1 after 50 cycles, and the capacity retention rate was 90.62%, which showed good cycle stability. The results of XRD and SEM showed that the sample sintered in oxygen atmosphere had a good layered structure with a small degree of cationic mixing and a good spherical shape. The particles were uniformly distributed in the range of 10-20 μm. The results of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) showed that the electrochemical performance of the cathode materials was improved by optimization conditions. |
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| Keywords: | LiNi0 8Co0 1Mn0 1O2 synthesis high-temperature solid-state electrochemistry stability lithium-ion battery |
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