The synergistic effects of Li2SiO3-coating and Si4+-doping for LiNi0.5Mn0.5O2 cathode materials on the structure and the electrochemical properties

doi:10.1149/2.0131713jes

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	The synergistic effects of Li2SiO3-coating and Si4+-doping for LiNi0.5Mn0.5O2 cathode materials on the structure and the electrochemical properties
	Yang, Guowei 3,4,5; Jia, Guofeng 3,4; Shangguan, Xuehui 3,4,5; Zhu, Zenghu 3,4; Peng, Zhengjun 3,4; Zhuge, Qin 3,4; Li, Faqiang 1,3,4; Cui, Xiaoling 2
刊名	Journal of the Electrochemical Society
	2017
卷号	164 期号:12 页码:A2889-A2897
关键词	Cathodes Coated materials Coatings Electrochemical properties Lithium Manganese compounds Nickel compounds Silicon compounds Stability Capacity retention Cath-ode materials Cycle stability Electrochemical measurements Electrochemical performance Rate performance Structural stabilities Synergistic effect
ISSN号	00134651
DOI	10.1149/2.0131713jes
英文摘要	zLi2SiO3@LiNi0.5Mn0.5O2 (z = 0, 0.03, 0.05, 0.08) ("@" means "was coated on the surface of") cathode materials had been successfully prepared via a syn-lithiation strategy. The structure and the electrochemical properties were analyzed systematically. The results of the structural analysis showed that Li2SiO3 was well coated on the surface of the material, and partial of Si4+ was doped into the structure. In addition, the results of the electrochemical measurements suggest that 3 mol% Li2SiO3-coated LiNi0.5Mn0.5O2 electrode has the best electrochemical performance, including the highest capacity, best cycle stability and rate performance. The capacity retention is improved about 24% by 3 mol% Li2SiO3 coating at 60C. Additionally, all the resistances of the 3 mol% Li2SiO3@LiNi0.5Mn0.5O2 cathode material are considerably smaller than that of the un-doped material, which means it has a faster lithium-ion migration rate. This finding is in good agreement with the calculated results. In summary, Li2SiO3 coating and Si4+ doping can lower Li/Ni mixing, increase the structural stability, reduce polarization, decrease the migration resistance and improve the migration rate of the lithium-ion which, in turn, improves the electrochemical properties of LiNi0.5Mn0.5O2. © 2017 The Electrochemical Society. All rights reserved.
WOS研究方向	Electrochemistry ; Materials Science
语种	英语
出版者	Electrochemical Society Inc.
WOS记录号	WOS:000415283600077
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114884]
专题	石油化工学院
作者单位	1.Qinghai Research Center of Low-temperature Lithium-ion Battery Technology Engineering, Qinghai Green Grass New Energy Technology Co. Ltd., Xining; 810000, China; 2.College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China 3.Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining; 810008, China; 4.Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining; 810008, China; 5.University of, Chinese Academy of Sciences, Beijing; 100049, China;
推荐引用方式 GB/T 7714	Yang, Guowei,Jia, Guofeng,Shangguan, Xuehui,et al. The synergistic effects of Li2SiO3-coating and Si4+-doping for LiNi0.5Mn0.5O2 cathode materials on the structure and the electrochemical properties[J]. Journal of the Electrochemical Society,2017,164(12):A2889-A2897.
APA	Yang, Guowei.,Jia, Guofeng.,Shangguan, Xuehui.,Zhu, Zenghu.,Peng, Zhengjun.,...&Cui, Xiaoling.(2017).The synergistic effects of Li2SiO3-coating and Si4+-doping for LiNi0.5Mn0.5O2 cathode materials on the structure and the electrochemical properties.Journal of the Electrochemical Society,164(12),A2889-A2897.
MLA	Yang, Guowei,et al."The synergistic effects of Li2SiO3-coating and Si4+-doping for LiNi0.5Mn0.5O2 cathode materials on the structure and the electrochemical properties".Journal of the Electrochemical Society 164.12(2017):A2889-A2897.