Effects of LiBF4 concentration in carbonate-based electrolyte on the stability of high-voltage LiNi0.5Mn1.5O4 cathode

doi:10.1007/s11581-019-02960-3

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	Effects of LiBF4 concentration in carbonate-based electrolyte on the stability of high-voltage LiNi0.5Mn1.5O4 cathode
	Feng, Yaohua 1; Xu, Hui 1,2; Zhang, Yu 1; Li, Chunlei 1,2; Zhao, Dongni 1; Zhao, Qiuping 1,2; Mao, Liping 1,2; Zhang, Haiming 2; Li, Shiyou 1,2
刊名	IONICS
	2019-08
卷号	25 期号:8 页码:3623-3631
关键词	Electrolyte LiBF4 High voltage LiNi0 5Mn(1) 5O(4) Salt concentration
ISSN号	0947-7047
DOI	10.1007/s11581-019-02960-3
英文摘要	LiBF4 has attracted much attention due to its better thermal stability, lower sensitivity to environmental humidity, and lower charge transfer resistance provided by its solution, especially at high voltage. Herein, the effects of the concentration of LiBF4 salt on the stability and electrochemical properties of LiNi0.5Mn1.5O4 (LNMO) cathode material have been investigated by using the mixed solvents of LiBF4 salt, vinyl carbonate (EC), and diethyl carbonate (DEC) as electrolytes. The surface morphology and structure of cycled LNMO electrode are studied by scanning electron microscopy (SEM), Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR). The results show that the optimum concentration of LiBF4 salt is 1.4M LiBF4-EC/DEC (1:5, by volume). Under optimum conditions, the LNMO cathode material has high electrochemical capacity and favorable rate performance. Meanwhile, the prepared electrolyte can easily form a thin and stable SEI film on the surface of LNMO electrode, which can effectively inhibit the continuous decomposition of the electrolyte.
资助项目	Natural Science Foundation of China[21766017][21566021] ; Science and Technology Planning Project of Gansu Province[18JR3RA160]
WOS研究方向	Chemistry ; Electrochemistry ; Physics
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000476796200012
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/31671]
专题	石油化工学院
通讯作者	Li, Shiyou
作者单位	1.Lanzhou Univ Technol, Coll Petrochem Technol, 36 Pengjiaping Rd, Lanzhou, Gansu, Peoples R China 2.Gansu Engn Lab Electrolyte Lithium Ion Battery, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Feng, Yaohua,Xu, Hui,Zhang, Yu,et al. Effects of LiBF4 concentration in carbonate-based electrolyte on the stability of high-voltage LiNi0.5Mn1.5O4 cathode[J]. IONICS,2019,25(8):3623-3631.
APA	Feng, Yaohua.,Xu, Hui.,Zhang, Yu.,Li, Chunlei.,Zhao, Dongni.,...&Li, Shiyou.(2019).Effects of LiBF4 concentration in carbonate-based electrolyte on the stability of high-voltage LiNi0.5Mn1.5O4 cathode.IONICS,25(8),3623-3631.
MLA	Feng, Yaohua,et al."Effects of LiBF4 concentration in carbonate-based electrolyte on the stability of high-voltage LiNi0.5Mn1.5O4 cathode".IONICS 25.8(2019):3623-3631.