In situ micro-Raman study of discharge products of Li/SOCl2 cells

✍ Scribed by M.C. Dhamelincourt; F. Wallart; J.P. Lelieur

• Book ID: 103898269
• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 261 KB
• Volume: 20
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/0378-7753(87)80092-7

✦ Synopsis

Raman spectroscopy, and especially micro-Raman spectroscopy, is a technique particularly well suited to the study of chemical species formed in lithium cells during discharge in the electrolyte, as well as at the electrode surface. This non-destructive method allows an in situ study of the reaction.

A microcell, directly adaptable to the stage of the spectrometer, has been constructed in order to observe the phenomena appearing in the solution near the electrodes and also at the surfaces of the electrodes. The low-rate discharge of Li/SOC12 cells at about 20 mA at room temperature has been studied. The formation of an Li(SOC12) (SO,)+ complex characterized by a band appearing at 1160 cm-' has been identified. When the laser beam was focused on the surface of the lithium electrode, a broad band was observed with a frequency which suggested that a complex species, probably Li(SOJs+, had been produced.