Investigations of the Safety of Li/socl sub 2 Batteries.
Abstract
Cyclic voltammetry and infrared spectrometry were employed as analytical tools to characterize the reaction products in Li/SOCl2 cells during various modes of operation. Sulfur dioxide is produced during the discharge. The nature of products formed during forced overdischarge depends on whether the cells are cathode or anode limited. Infrared spectral data indicated that Li2S is formed in cathode limited cells during forced overdischarge. On the other hand, there was very little or no Li2S present in cells at the end of discharge or in anode limited cells after forced overdischarge. From anode limited cells, Cl2 and a compound exhibiting IR absorption at 1070 cm(-1) were detected after forced overdischarge. These materials are formed by oxidation reactions at the anode. Analysis of solutions from cells discharged without Li on the anode showed that SO2Cl2, SOCl(+)AlCl14(-), Cl2, a material absorbing at 1070 cm(-1) and probably SCl2 are formed as oxidation products. Some SO2 was also found in these solutions. The products detectable after 'charging' a Li/SOCl2 cell were SO2Cl2, scl2, and the material exhibiting absorption in the infrared spectrum at 1070 cm(-1). On the basis of materials characterized from IR spectral and cyclic voltammetry data, a mechanism is proposed for the oxidation reactions in soCl2/LiAlCl4 solutions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1979
- Accession Number
- ADA072862
Entities
People
- Gerhard L. Holleck
- Kuzhikalail M. Abraham
- Richard M. Mank