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Anode-limited cell reversal in lithium-sulfur oxyhalide cells

Journal Article · · J. Electrochem. Soc.; (United States)
DOI:https://doi.org/10.1149/1.2115352· OSTI ID:5899407

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/sq cm. In the lithium-thionyl chloride system the species HCl, CS2, SO2, S2O, SCl2, and SO2Cl2 were identified in the gas phase and HCl, AlCl3OH(-), SO2, SO2Cl2, and SOCl(+) AlCl4(-) in the liquid phase. A species giving rise to three absorption bands at 1337, 1070, and 665/cm 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 Li(SO2, SO2Cl2(+)AlCl4(-) and is analogous to the well-known complexes involving LiAlCl4, SO2, and SOCl2. The lithium-sulfuryl chloride cell behaved similarly to the thionyl chloride cell, specifically with respect to formation of SO2(-) and SOCl(+)-like species - the latter tentatively identified as SO2CL(+). 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 SO2 to form SO2Cl2. 18 references.

Research Organization:
Gould, Inc., Eagan, MN
OSTI ID:
5899407
Journal Information:
J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 131; ISSN JESOA
Country of Publication:
United States
Language:
English