A salt-derived solid electrolyte interphase by electroreduction of water-in-salt electrolyte for uniform lithium deposition

doi:10.1016/j.jpowsour.2019.227073

CORC > 金属研究所 > 中国科学院金属研究所

	A salt-derived solid electrolyte interphase by electroreduction of water-in-salt electrolyte for uniform lithium deposition
	Wang, Zhenxing 1,2; Sun, Chengguo 3; Shi, Ying 1; Qi, Fulai 1; Wei, Qinwei 1,2; Li, Xin 1,2; Sun, Zhenhua 1,2; An, Baigang 3; Li, Feng 1,2,3
刊名	JOURNAL OF POWER SOURCES
	2019-11-01
卷号	439 页码:6
关键词	Water-in-salt Solid electrolyte interphase Dendrite-free Li anode Electroreduction Space charge
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2019.227073
通讯作者	Li, Feng(fli@imr.ac.cn)
英文摘要	Notorious growth of dendritic lithium with low Coulombic efficiency causes safety and stability issues, which hinder practical applications. To control the lithium deposition so that one has a dendrite-free lithium metal anode with high Coulombic efficiency is highly desirable but challenging. Here, this work reports a copper substrate covered by a salt-derived solid electrolyte interphase that produced by electroreduction of a highly concentrated water-in-salt electrolyte to realize stable lithium deposition. Quite distinct from the resistive layer comprised principally of solvent-derived organic species (such as lithium alkyl carbonates) that produced in conventional dilute electrolyte, this salt-derived solid electrolyte interphase is rich in inorganic components (mainly Li2SxOy and LiF), which effectively reduce the overpotential and facilitate fast Li+ transport. In addition, a small number of reduced fluorine organic anions -CFx stabilize the space charge to give a uniform distribution of Li+. Such a solid electrolyte interphase on the copper substrate is able to modulate the lithium plating/stripping to produce uniform spherical lithium deposition with no dendrites, and a high Coulombic efficiency (approximate to 98.2%) is achieved. This work provides a unique strategy to enlarge the functions of the lithium salt decompositions on the protection of lithium metal anodes.
资助项目	National Natural Science Foundation of China, China[51525206] ; National Natural Science Foundation of China, China[51521091] ; MOST, China[2016YFA0200100] ; MOST, China[2016YFB0100100] ; Strategic Priority Research Program of the Chinese Academy of Sciences, China[XDA22010602] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences, China[2015150] ; Key Research Program of the Chinese Academy of Sciences, China[KGZD-EW-T06] ; CAS-SAFEA International Partnership Program for Creative Research Teams, China
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000494891700006
资助机构	National Natural Science Foundation of China, China ; MOST, China ; Strategic Priority Research Program of the Chinese Academy of Sciences, China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences, China ; Key Research Program of the Chinese Academy of Sciences, China ; CAS-SAFEA International Partnership Program for Creative Research Teams, China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/136818]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, Feng
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 3.Univ Sci & Technol Liaoning, Sch Chem Engn, Anshan 114051, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhenxing,Sun, Chengguo,Shi, Ying,et al. A salt-derived solid electrolyte interphase by electroreduction of water-in-salt electrolyte for uniform lithium deposition[J]. JOURNAL OF POWER SOURCES,2019,439:6.
APA	Wang, Zhenxing.,Sun, Chengguo.,Shi, Ying.,Qi, Fulai.,Wei, Qinwei.,...&Li, Feng.(2019).A salt-derived solid electrolyte interphase by electroreduction of water-in-salt electrolyte for uniform lithium deposition.JOURNAL OF POWER SOURCES,439,6.
MLA	Wang, Zhenxing,et al."A salt-derived solid electrolyte interphase by electroreduction of water-in-salt electrolyte for uniform lithium deposition".JOURNAL OF POWER SOURCES 439(2019):6.