Title :
Improvement of the voltage delay in the Li/SOCl2 system-SEM and AC spectroscopy study
Author :
Yamin, H. ; Pallivathikal, M. ; Elster, E.
Author_Institution :
Tadiran Battery Div., Rehovot, Israel
Abstract :
An in situ coating of the lithium anode by a new ion conducting film substantially reduces the voltage delay in Li/SOCl2 cells. Scanning electron microscopy measurements were conducted on the surface of lithium taken from commercial cells with and without coating. The results show that the new film has a different morphology, is denser and more compact than the nonmodified film. The electrical properties of the new film in comparison to the nonmodified film were studied by an AC impedance technique under open-and closed-circuit conditions, it was found that the electrical resistance of both types of film increased with cell age. The resistance of the new film was lower by one to two orders of magnitude. This is attributed to the lower film thickness and electrical resistivity. Microcalorimetric and accelerated life studies of cells in open and closed circuit showed that the shelf and operating life of the improved voltage response cells is very good
Keywords :
calorimeters; electrochemical electrodes; electrochemistry; life testing; lithium; primary cells; scanning electron microscope examination of materials; spectroscopy; sulphur compounds; AC impedance; AC spectroscopy; Li-SOCl2 primary cells; SEM; anode; electrical properties; electrical resistance; electrical resistivity; electrochemistry; in situ coating; ion conducting film; life testing; microcalorimetry; morphology; operating life; shelf life; voltage delay; voltage response; Anodes; Coatings; Conductive films; Delay; Electric resistance; Lithium; Scanning electron microscopy; Surface impedance; Surface morphology; Voltage;
Conference_Titel :
Power Sources Symposium, 1992., IEEE 35th International
Conference_Location :
Cherry Hill, NJ
Print_ISBN :
0-7803-0552-3
DOI :
10.1109/IPSS.1992.282052
