THE REACTIVITY OF LINEAR ALKYL CARBONATES TOWARD METALLIC LITHIUM: INFRARED REFLECTION ABSORPTION SPECTROSCOPIC STUDIES IN ULTRAHIGH VACUUM

摘要

The reactivity of clean Li foils toward dimethyl-, diethyl-, and ethyl-methyl carbonates (DMC, DEC and EMC, respectively) has been examined by infrared reflection absorption spectroscopy (IRAS) in UHV. This work complements an analogous investigation reported recently involving propylene carbonate (PC). A rather general reaction mechanism for the Li metal-induced decomposition of both linear and cyclic carbonates has been deduced, which may be of relevance to Li passive films formed in electrochemical environments.