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, Hui1,2 ; Zhang, Yu 1; Li, Chunlei1,2 ; Zhao, Dongni1 ; Zhao, Qiuping1,2 ; Mao, Liping1,2 ; Zhang, Haiming 2; Li, Shiyou1,2
	2019-08
发表期刊	IONICS
ISSN	0947-7047
卷号	25 期号:8 页码:3623-3631
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.
关键词	Electrolyte LiBF4 High voltage LiNi0 5Mn(1) 5O(4) Salt concentration
DOI	10.1007/s11581-019-02960-3
收录类别	SCI ; SCIE
语种	英语
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
WOS类目	Chemistry, Physical ; Electrochemistry ; Physics, Condensed Matter
WOS记录号	WOS:000476796200012
出版者	SPRINGER HEIDELBERG
EI入藏号	20193007226733
EI主题词	Lithium compounds
EI分类号	702 Electric Batteries and Fuel Cells - 801 Chemistry - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 951 Materials Science
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/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
第一作者单位	石油化工学院
通讯作者单位	石油化工学院
第一作者的第一单位	石油化工学院
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.

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