Spectroscopic studies of lithium in an ultrahigh vacuum system

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

Research output: Contribution to journalArticlepeer-review

34 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 languageEnglish
Pages (from-to)63-76
Number of pages14
JournalJournal of Electroanalytical Chemistry
Volume358
Issue number1-2
DOIs
StatePublished - 1 Nov 1993
Externally publishedYes

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.

FundersFunder number
Office of Naval Research

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