ITP OpenIR  > SCI期刊论文
Zhou, Yufan; Su, Mao3,4,5; Yu, Xiaofei; Zhang, Yanyan; Wang, Jun-Gang; Ren, Xiaodi6; Cao, Ruiguo6; Xu, Wu6; Baer, Donald R.; Du, Yingge3; Borodin, Oleg7,8; Wang, Yanting4,5; Wang, Xue-Lin; Xu, Kang7,8; Xu, Zhijie3; Wang, Chongmin; Zhu, Zihua
Real-time mass spectrometric characterization of the solid-electrolyte interphase of a lithium-ion battery
AbstractThe solid-electrolyte interphase (SEI) dictates the performance of most batteries, but the understanding of its chemistry and structure is limited by the lack of in situ experimental tools. In this work, we present a dynamic picture of the SEI formation in lithium-ion batteries using in operando liquid secondary ion mass spectrometry in combination with molecular dynamics simulations. We find that before any interphasial chemistry occurs (during the initial charging), an electric double layer forms at the electrode/electrolyte interface due to the self-assembly of solvent molecules. The formation of the double layer is directed by Li+ and the electrode surface potential. The structure of this double layer predicts the eventual interphasial chemistry; in particular, the negatively charged electrode surface repels salt anions from the inner layer and results in an inner SEI that is thin, dense and inorganic in nature. It is this dense layer that is responsible for conducting Li+ and insulating electrons, the main functions of the SEI. An electrolyte-permeable and organic-rich outer layer appears after the formation of the inner layer. In the presence of a highly concentrated, fluoride-rich electrolyte, the inner SEI layer has an elevated concentration of LiF due to the presence of anions in the double layer. These real-time nanoscale observations will be helpful in engineering better interphases for future batteries. An operando mass spectrometry technique, along with molecular dynamics simulations, unveils the evolution of the solid-electrolyte interphase chemistry and structure in lithium-ion batteries during the first cycle.
Cooperation Status国际
Subject AreaScience & Technology - Other Topics ; Materials Science
MOST Discipline CatalogueNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
Indexed BySCIE
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Cited Times:42[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA
2.Shandong Univ, Inst Frontier & Interdisciplinar Sci, Qingdao, Peoples R China
3.Shandong Univ, Key Lab Particle Phys & Particle Irradiat MOE, Qingdao, Peoples R China
4.Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA 99352 USA
5.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing, Peoples R China
6.Univ Chinese Acad Sci, Sch Phys Sci, Beijing, Peoples R China
7.Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA
8.US Army Res Lab, Energy & Biotechnol Div, Sensor & Electron Devices Directorate, Adelphi, MD 20783 USA
9.US Army Res Lab, Joint Ctr Energy Storage Res, Adelphi, MD 20783 USA
Recommended Citation
GB/T 7714
Zhou, Yufan,Su, Mao,Yu, Xiaofei,et al. Real-time mass spectrometric characterization of the solid-electrolyte interphase of a lithium-ion battery[J]. NATURE NANOTECHNOLOGY,2020,15(3):224.
APA Zhou, Yufan.,Su, Mao.,Yu, Xiaofei.,Zhang, Yanyan.,Wang, Jun-Gang.,...&Zhu, Zihua.(2020).Real-time mass spectrometric characterization of the solid-electrolyte interphase of a lithium-ion battery.NATURE NANOTECHNOLOGY,15(3),224.
MLA Zhou, Yufan,et al."Real-time mass spectrometric characterization of the solid-electrolyte interphase of a lithium-ion battery".NATURE NANOTECHNOLOGY 15.3(2020):224.
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