RAMAN-SPECTROSCOPIC AND ELECTROCHEMICAL STUDIES OF LITHIUM BATTERY COMPONENTS

The species in the electrolyte and at, or near, the working electrode surface of an operating cell can be identified by Raman spectroscopy. Examples for the electrolyte methyl acetate/LiAsF6, without and with C O2 saturation, are described. The role of the additive, tetramethylamm onium, is suggested. Conclusions from measurements of corrosion potent ial-time transients following in situ cutting to expose bare lithium m etal to various organic electrolyte environments are reviewed. Prelimi nary Raman spectral measurements of carbon-coke anodes suggest that ch arging cycles cause intraplanar rupturing, thus reducing the microcrys tallite size and causing measurable disorder.