Synergistic effect of sulfolane and lithium Difluoro(oxalate)borate on improvement of compatibility for LiNi0.8Co0.8Al0.05O2 electrode

doi:10.1016/j.electacta.2020.135727

IR > 石油化工学院

	Synergistic effect of sulfolane and lithium Difluoro(oxalate)borate on improvement of compatibility for LiNi0.8Co0.8Al0.05O2 electrode
	Zhang, Feilong 1,2; Wang, Chao 1; Zhao, Dongni1 ; Yang, Li1 ; Wang, Peng 1; Li, Wenbo 1; Wang, Bo1 ; Li, Shiyou1,2
	2020-03-20
发表期刊	ELECTROCHIMICA ACTA
ISSN	0013-4686
卷号	337
摘要	High nickel LiNi0.8Co0.8Al0.05O2 (NCA) cathode material has become one of the most promising cathode materials in the field of power batteries, but the side reaction between the conventional LiPF6-based electrolyte and the surface of the NCA material results in poor material interface stability. In this work, a compatible lithium difluoro(oxalate)borate (LiDFOB)-based electrolyte by the employment of sulfolane (SL) as a representative sulfur-containing solvent has been built to enhance the interfacial stability of NCA electrode. The composition, morphology and electrochemical properties are studied by X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy et al. Results show that the decomposition of LiDFOB on the surface of the positive electrode material contributes to forming a uniform cathode electrolyte interface (CEI) film, which subsequently reduces the dissolution of metal ions and hinders the structure transition of the material from the layered structure to spinel or rock-salt phases. Besides, the sulfur-containing products resulted from the decomposition of SL promote the conductivity of Li+ ions for CEI film, which makes up for shortcomings of LiDFOB. Moreover, more Li+ has been formed due to the synergistic action between LiDFOB salt and SL solvent, improving the stability and density of CEI film, reducing the thickness of CEI film, and further improving the cycle performance of the battery. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	LiNi0.8Co0.8Al0.05O2 Lithium difluoro(oxalate)borate Sulfolane Interfacial stability Synergistic effect
DOI	10.1016/j.electacta.2020.135727
收录类别	SCI
语种	英语
资助项目	Transformation of Scientific and Technological Achievements of Gansu Institutions of Higher Education[2017D-04] ; High Value Patent Conversion Implementation Project[18ZC1LA014] ; Gansu Province Science and Technology Major Project[17ZD2GC011]
WOS研究方向	Electrochemistry
WOS类目	Electrochemistry
WOS记录号	WOS:000521531700070
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：19[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/64155
专题	石油化工学院马克思主义学院图书馆
通讯作者	Li, Shiyou
作者单位	1.Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Peoples R China 2.Gansu Engn Lab Electrolyte Mat Lithium Ion Batter, Lanzhou 730050, 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	Zhang, Feilong,Wang, Chao,Zhao, Dongni,et al. Synergistic effect of sulfolane and lithium Difluoro(oxalate)borate on improvement of compatibility for LiNi0.8Co0.8Al0.05O2 electrode[J]. ELECTROCHIMICA ACTA,2020,337.
APA	Zhang, Feilong.,Wang, Chao.,Zhao, Dongni.,Yang, Li.,Wang, Peng.,...&Li, Shiyou.(2020).Synergistic effect of sulfolane and lithium Difluoro(oxalate)borate on improvement of compatibility for LiNi0.8Co0.8Al0.05O2 electrode.ELECTROCHIMICA ACTA,337.
MLA	Zhang, Feilong,et al."Synergistic effect of sulfolane and lithium Difluoro(oxalate)borate on improvement of compatibility for LiNi0.8Co0.8Al0.05O2 electrode".ELECTROCHIMICA ACTA 337(2020).