Enhanced electrochemical properties of LiNi0.6Co0.2Mn0.2O2 cathode material by the diffusional Al2O3 coating layer

doi:10.1007/s11581-018-2725-x

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Enhanced electrochemical properties of LiNi0.6Co0.2Mn0.2O2 cathode material by the diffusional Al2O3 coating layer
	Cui, Xiaoling 1,2; Ai, Ling 2; Mao, Liping 1,2; Xie, Yingchun 2; Liang, Youwei 1,2; Zhang, Ningshuan 1,2,3; Feng, Yaohua 2; Wang, Shengxian 1,2; Li, Shiyou 1,2,3
刊名	IONICS
	2019-02
卷号	25 期号:2 页码:411-419
关键词	LiNi0.6Co0.2Mn0.2O2 Diffusion Al2O3 coating High-quality coating layer Electrochemical performance
ISSN号	0947-7047
DOI	10.1007/s11581-018-2725-x
英文摘要	The surface coating is a greatly effective approach to improve the electrochemical performance of the Ni-rich LiNi0.6Co0.2Mn0.2O2 cathode material. Herein, the traditional and diffusional Al2O3 coating ways are used to modify LiNi0.6Co0.2Mn0.2O2 cathode materials. Various analysis techniques, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were used to characterize materials. The results show that a thin and homogeneous Al2O3 coating layer was prepared on diffusional surface coating compared with traditional surface coating with a thick and uneven Al2O3 coating layer. The diffusional coating material exhibits the optimized electrochemical performance, with retention of 99.5% after 100cycles at 1 C, and excellent rate performance. The electrochemical impedance spectroscopy further confirms that the superior electrochemical performance of diffusional Al2O3 coating sample can be attributed to the high-quality coating layer which is formed by the interface reactions between Al2O3 particles and the surface of LiNi0.6Co0.2Mn0.2O2 cathode material during high-temperature calcination. The outstanding coating layer not only protects the active material from the attack of electrolyte but also shortens Li+ diffusion path effectively during charge/discharge process. Based on the above results, the diffusional Al2O3 coating is considered as an effective surface modification method to improve the electrochemical performance of LiNi0.6Co0.2Mn0.2O2 materials.
资助项目	Transformation of Scientific and Technological Achievements of Gansu Institutions of Higher Education[2017 D-04]
WOS研究方向	Chemistry ; Electrochemistry ; Physics
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000457774500003
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32122]
专题	石油化工学院
通讯作者	Li, Shiyou
作者单位	1.Gansu Engn Lab Cathode Mat Lithium Ion Battery, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Coll Petrochem Technol, 36 Pengjiaping Rd, Lanzhou 730050, Gansu, Peoples R China 3.Qinghai Green Grass New Energy Technol Co Ltd, Qinghai Res Ctr Low Temp Lithium China Ion Batter, Xining 810000, Qinghai, Peoples R China
推荐引用方式 GB/T 7714	Cui, Xiaoling,Ai, Ling,Mao, Liping,et al. Enhanced electrochemical properties of LiNi0.6Co0.2Mn0.2O2 cathode material by the diffusional Al2O3 coating layer[J]. IONICS,2019,25(2):411-419.
APA	Cui, Xiaoling.,Ai, Ling.,Mao, Liping.,Xie, Yingchun.,Liang, Youwei.,...&Li, Shiyou.(2019).Enhanced electrochemical properties of LiNi0.6Co0.2Mn0.2O2 cathode material by the diffusional Al2O3 coating layer.IONICS,25(2),411-419.
MLA	Cui, Xiaoling,et al."Enhanced electrochemical properties of LiNi0.6Co0.2Mn0.2O2 cathode material by the diffusional Al2O3 coating layer".IONICS 25.2(2019):411-419.