Voltage variation with temperature for Li/SOCl{sub 2} and Li/MnO{sub 2} cells using a non steady state method
- Mine Safety Appliance Co., Sparks, MD (United States)
Several investigations have been carried out over the past 15 years relating to the heat generating characteristics of Li/SOCl{sub 2} cells. All have used steady state methods, some involving the direct heat generation by calorimetry and others using the temperature dependence of the cell open circuit voltage. There has been a wide variation in results from these investigations with d(OCV)/dT values ranging from about {minus}0.2 to +1.026 reported in the literature. A non steady state method is being developed to examine cell voltage changes with temperature. This method was applied to Li/SOCl{sub 2} and Li/MnO{sub 2} cells at OCV and under load. Both types of cell at OCV showed negative coefficients for voltage changes with temperature during both heating and cooling cycles. Cells at CCV and cells with high microcalorimetry outputs showed positive coefficients for voltage changes with temperature. The results suggest that temperature dependence data obtained by extrapolating from a cell under load to the open circuit condition can lead to erroneous results. d(OCV)/dT for a Li/SOCl{sub 2} cell changed direction and back again, when the cell OCV passed through a value of 3.718 volts. This is believed to represent a direct observation of the thermoneutral potential.
- OSTI ID:
- 43061
- Report Number(s):
- CONF-931024-; ISBN 1-56677-033-5; TRN: IM9521%%226
- Resource Relation:
- Conference: 184. meeting of the Electrochemical Society, New Orleans, LA (United States), 10-15 Oct 1993; Other Information: PBD: 1994; Related Information: Is Part Of Lithium batteries: Proceedings Volume 94-4; Doddapaneni, N. [ed.] [Sandia National Labs., Albuquerque, NM (United States)]; Landgrebe, A.R. [ed.] [Dept. of Energy, Washington, DC (United States)]; PB: 307 p.
- Country of Publication:
- United States
- Language:
- English
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