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Anode‐Limited Cell Reversal in Lithium‐Sulfur Oxyhalide Cells

1984; Institute of Physics; Volume: 131; Issue: 11 Linguagem: Inglês

10.1149/1.2115352

1945-7111

Alan I. Attia, Christian Sarrazin, Kenneth A. Gabriel, Richard P. Burns,

Coordination Chemistry and Organometallics

In situ infrared spectroscopy and mass spectrometry were used to investigate the gas and liquid phases in lithium‐sulfur oxyhalide cells driven into anode‐limited reversal at 1–5 mA/cm2. In the lithium‐thionyl chloride system the species, , , , , and were identified in the gas phase and , , , , and in the liquid phase. A species giving rise to three absorption bands at 1337, 1070, and 665 cm−1 was observed in the liquid phase of that system during anode‐limited reversal only, and in the lithium sulfuryl chloride system during normal discharge and during reversal; this compound was tentatively identified as and is analogous to the well‐known complexes involving , , and . The lithium‐sulfuryl chloride cell behaved similarly to the thionyl chloride cell, specifically with respect to formation of and species—the latter tentatively identified as . Indirect evidence suggests that chlorine may accumulate in both systems at −20°C, but at 25°C its accumulation in the cells is prevented by its reaction with to form .