Reactivity of lithium toward nonaqueous solvents of relevance to energy storage applications as studied by surface analytical techniques

• Published in: Journal of physical chemistry (1952) 1993-10, Vol.97 (42), p.11075-11080
• Main Authors: Wang, K, Chottiner, G. S, Scherson, Daniel A
• Format: Article
• Language: English
• Subjects: 360105 > Metals & Alloys-- Corrosion & Erosion; 400102 > Chemical & Spectral Procedures; 400201 > Chemical & Physicochemical Properties; ALKALI METALS; AUGER ELECTRON SPECTROSCOPY; CHEMICAL REACTIONS; Chemistry; DATA; DESORPTION; DEUTERIUM COMPOUNDS; ELECTRIC BATTERIES; ELECTROCHEMICAL CELLS; ELECTRON SPECTROSCOPY; ELEMENTS; ENERGY STORAGE; Exact sciences and technology; EXPERIMENTAL DATA; FURANS; General and physical chemistry; HETEROCYCLIC COMPOUNDS; HYDROGEN COMPOUNDS; INFORMATION; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; LITHIUM; MATERIALS SCIENCE; METALS; NUMERICAL DATA; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; SILVER; Solid-gas interface; SORPTION; SPECTROSCOPY; Surface physical chemistry; TETRAHYDROFURAN; TRANSITION ELEMENTS 250903 > Energy Storage-- Batteries-- Materials, Components, & Auxiliaries; ULTRAHIGH VACUUM; X-RAY SPECTROSCOPY
• ISSN: 0022-3654; 1541-5740
• DOI: 10.1021/j100144a029

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 langmuirs of 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 ca. 300 K is negligibly small. Clearly defined C(1s) and O(1s) XPS features were observed, however, for submonolayer coverages of TDF ([theta](TDF) < 1) on Li/Ag(poly), obtained by first condensing a thick layer of TDF below 140 K and late: gently warming the specimen to ca. 300 K. The binding energies of these peaks were smaller than those observed for condensed TDF recorded at ca. 135 K, for which the features were identical to those found for [theta](TDF) < 1 on bare Ag(poly) at the same temperature. The m/e = 48 TPD spectra of TDF condensed on Ag(poly) yielded for [theta](TDF) < 1 a well-defined peak centered in the range 210-240 K, a temperature much higher than that associated with the desorption of bulklike TDF (ca, 170 K). 30 refs., 8 figs., 1 tab.