Knowledge Management System Of Institute of metal research，CAS
| A salt-derived solid electrolyte interphase by electroreduction of water-in-salt electrolyte for uniform lithium deposition | |
| Wang, Zhenxing; Sun, Chengguo; Shi, Ying; Qi, Fulai; Wei, Qinwei; Li, Xin; Sun, Zhenhua; An, Baigang; Li, Feng | |
| 2019-11-01 | |
| Source Publication | JOURNAL OF POWER SOURCES
 |
| ISSN | 0378-7753 |
| Volume | 439 |
| Abstract | 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. |
| Keyword | Water-in-salt Solid electrolyte interphase Dendrite-free Li anode Electroreduction Space charge |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000494891700006 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/80666 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation 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. |
| 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. |
| 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). |
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