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The reactivity of lithium toward non-aqueous solvents of relevance to energy storage applications as studied by surface analytical techniques. Final report [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1993.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
26 pages : digital, PDF file
Additional Creators
Case Western Reserve University, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The interactions between metallic lithium and perdeuterated tetrahydrofuran (TDF) have been examined in ultrahigh vacuum (UHV) by X-ray photoelectron and Auger electron spectroscopies (XPS and AES, respectively) and temperature programmed desorption (TPD). The AES, XPS and TPD spectra of thick layers of Li vapor deposited on clean polycrystalline silver (Ag(poly)) foils exposed to up to 100 L TDF at room temperature showed no evidence for features other than those associated with clean Li/Ag(poly) surfaces. This indicates that the sticking coefficient of (gaseous) TDF on Li at 300 K is negligibly small. Clearly defined C(ls) and O(1s) XPS features were observed, however, for submonolayer coverages of TDF on Li/Ag(poly), obtained by first condensing a thick layer of TDF below 140 K and later gently warming the specimen to 300 K. The binding energies of these peaks were smaller than those for condensed TDF at 135 K. The m/e - 48 TPD spectra of TDF condensed on Ag(poly) yielded for O(TDF) < 1 a well defined peak centered in the range of 210 - 240 K, a temperature much higher than that associated with the desorption of bulklike TDF (ca. 170 K). The fragmentation patterns of adsorbed TDF were consistent with cyclopropane and formaldehyde as the most likely thermally desorbed species. Unlike the behavior observed for TDF/Ag(poly) for which no TPD features were detected for T > 300 K, the m/e - 4 TPD spectra for TDF/Li/Ag(T-oly) displayed a prominent peak centered at about 600 K attributed to, Dâ‚‚ generated by the thermal decomposition of LiD. This provides rather unambiguous evidence that TDF reacts with Li at temperatures lower than 350 K to yield LiD as the main product.
Report Numbers
E 1.99:lbl--34312
lbl--34312
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
06/01/1993.
"lbl--34312"
"DE94003483"
Wang, K.; Scherson, D.A.; Chottiner, G.S.
Type of Report and Period Covered Note
Topical; 06/01/1993 - 06/01/1993
Funding Information
AC03-76SF00098
View MARC record | catkey: 14100977