Spectroscopic studies of lithium in an ultrahigh vacuum system

D. Aurbach; M. Daroux; G. McDougall; E. B. Yeager

doi:10.1016/0022-0728(93)80431-g

Spectroscopic studies of lithium in an ultrahigh vacuum system

D. Aurbach, M. Daroux, G. McDougall, E. B. Yeager

Case Western Reserve University

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

The surface films formed on lithium in dimethoxyethane (DME) and LiAsF₆ solution in DME were investigated using X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) in an ultrahigh vacuum (UHV) system. Fresh Li surfaces in DME were prepared under UHV conditions by Argon sputtering of bulk lithium followed by immersion in the solution phase (under Argon), and characterization by the above spectroscopies, all within the UHV transfer system. It was found that the surface layers formed on Li in DME contain Li methoxide and LiOH or Li₂O species (attributed to water reduction). When LiAsF₆ was present, the surface films also contained LiF. Depth profiling by Argon sputtering and AES measurements seem to be consistent with a bilayer structure of the surface films in which the oxide-hydroxide layer is abuts the Li surface and solvent reduction species comprise the outer part of the film.

Original language	English
Pages (from-to)	63-76
Number of pages	14
Journal	Journal of Electroanalytical Chemistry
Volume	358
Issue number	1-2
DOIs	https://doi.org/10.1016/0022-0728(93)80431-g
State	Published - 1 Nov 1993
Externally published	Yes

Bibliographical note

Funding Information:
The authorsa re pleasedt o acknowledgeth e supporto f the Ever Ready Battery Company,W estlake,O hio, and the Office of Naval Research.

Funding

The authorsa re pleasedt o acknowledgeth e supporto f the Ever Ready Battery Company,W estlake,O hio, and the Office of Naval Research.

Funders	Funder number
Office of Naval Research

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10.1016/0022-0728(93)80431-g

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title = "Spectroscopic studies of lithium in an ultrahigh vacuum system",

abstract = "The surface films formed on lithium in dimethoxyethane (DME) and LiAsF6 solution in DME were investigated using X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) in an ultrahigh vacuum (UHV) system. Fresh Li surfaces in DME were prepared under UHV conditions by Argon sputtering of bulk lithium followed by immersion in the solution phase (under Argon), and characterization by the above spectroscopies, all within the UHV transfer system. It was found that the surface layers formed on Li in DME contain Li methoxide and LiOH or Li2O species (attributed to water reduction). When LiAsF6 was present, the surface films also contained LiF. Depth profiling by Argon sputtering and AES measurements seem to be consistent with a bilayer structure of the surface films in which the oxide-hydroxide layer is abuts the Li surface and solvent reduction species comprise the outer part of the film.",

author = "D. Aurbach and M. Daroux and G. McDougall and Yeager, {E. B.}",

note = "Funding Information: The authorsa re pleasedt o acknowledgeth e supporto f the Ever Ready Battery Company,W estlake,O hio, and the Office of Naval Research.",

year = "1993",

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doi = "10.1016/0022-0728(93)80431-g",

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AU - Aurbach, D.

AU - Daroux, M.

AU - McDougall, G.

AU - Yeager, E. B.

N1 - Funding Information: The authorsa re pleasedt o acknowledgeth e supporto f the Ever Ready Battery Company,W estlake,O hio, and the Office of Naval Research.

PY - 1993/11/1

Y1 - 1993/11/1

N2 - The surface films formed on lithium in dimethoxyethane (DME) and LiAsF6 solution in DME were investigated using X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) in an ultrahigh vacuum (UHV) system. Fresh Li surfaces in DME were prepared under UHV conditions by Argon sputtering of bulk lithium followed by immersion in the solution phase (under Argon), and characterization by the above spectroscopies, all within the UHV transfer system. It was found that the surface layers formed on Li in DME contain Li methoxide and LiOH or Li2O species (attributed to water reduction). When LiAsF6 was present, the surface films also contained LiF. Depth profiling by Argon sputtering and AES measurements seem to be consistent with a bilayer structure of the surface films in which the oxide-hydroxide layer is abuts the Li surface and solvent reduction species comprise the outer part of the film.

AB - The surface films formed on lithium in dimethoxyethane (DME) and LiAsF6 solution in DME were investigated using X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) in an ultrahigh vacuum (UHV) system. Fresh Li surfaces in DME were prepared under UHV conditions by Argon sputtering of bulk lithium followed by immersion in the solution phase (under Argon), and characterization by the above spectroscopies, all within the UHV transfer system. It was found that the surface layers formed on Li in DME contain Li methoxide and LiOH or Li2O species (attributed to water reduction). When LiAsF6 was present, the surface films also contained LiF. Depth profiling by Argon sputtering and AES measurements seem to be consistent with a bilayer structure of the surface films in which the oxide-hydroxide layer is abuts the Li surface and solvent reduction species comprise the outer part of the film.

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ER -

Spectroscopic studies of lithium in an ultrahigh vacuum system

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