[1]汪 萍,李奇峰,蒋 艳,等.长循环单晶镍钴锰三元正极材料的制备和表征[J].镇江高专学报,2015,(01):62.
 WANG Ping,LI Qi feng,JIANG Yan,et al.Preparation and Characterization of Longcirculating monocrystalline LiNi0.5Co0.2Mn0.3O2 cathode material[J].Journal of Zhenjiang College,2015,(01):62.
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长循环单晶镍钴锰三元正极材料的制备和表征
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《镇江高专学报》[ISSN:/CN:]

卷:
期数:
2015年01期
页码:
62
栏目:
科技研究与开发
出版日期:
2015-02-28

文章信息/Info

Title:
Preparation and Characterization of Longcirculating monocrystalline LiNi0.5Co0.2Mn0.3O2 cathode material
作者:
汪  萍1李奇峰2蒋  艳1胡永正2王婷婷1
(1. 镇江高等专科学校 化工系,江苏 镇江 212003; 2. 江苏科捷锂电池有限公司 研发部,江苏 镇江 212006)
Author(s):
WANG Ping1LI Qifeng2JIANG Yan1HU Yongzheng2WANG Tingting1
(1. Chemical Engineering Department, Zhenjiang College, Zhenjiang 212013, China;2. Jiangsu King Lithium Cell Co., LTD, Zhenjiang 212013, China)
关键词:
锂离子电池LiNi0.5Co0.2Mn0.3O2单晶掺杂电化学性能
Keywords:
 Lithiumion battery LiNi0.5Co0.2Mn0.3O2 single crystal doped electrochemical performance
摘要:
 采用固相法制备出镍钴锰三元氧化物LiNi0.5Co0.2Mn0.3O2的单晶材料,然后,进行镁、钛掺杂处理。采用XRD,SEM和恒流充放电等测试手段对材料的晶体结构、形貌和电化学性能等进行研究。测试结果表明,材料形成形貌良好的单晶颗粒,且经过镁、钛掺杂处理后的材料单晶形貌没有改变。掺杂镁、钛后,材料的电化学性能得到明显的改善,LiNi0.5Co0.2Mn0.3O2的单晶材料掺杂镁、钛后容量从159.59 mAh/g提升到162.57 mAh/g,做成全电池后,2 C的放电效率从79.6%提高到了87.3%,1 C下循环300圈后的容量保持率从84.89 %提高到92.9%。
Abstract:
 Longcirculating monocrystalline LiNi0.5Co0.2Mn0.3O2 cathode material have been prepared by using hightemperature sintering technique. To improve the rate capacity and conductivity, cathode material was doped with metal Mg and Ti. The crystal structure,morphology and electrochemical properties of the doped samples were characterized by XRD, SEM and galvanostatic charge /discharge. The results show that these particles are single crystal structures, and that the doped material single crystal morphology has not changed. It was found that the modifications could improve electrochemical performances of the original materials effectively. The reversible capacity of the doped material increased from159.59mAh/g to162.57mAh/g. The whole cell was shown discharging efficiency increased from79.6 % to 87.3 % at 2C rate, and retained 92.9% of initial reversible capacity after 300 galvanostatic cycles at 1 C rate compared with the undoped material retaining 84.89 %.
更新日期/Last Update: 2015-03-01