Lithium deposition during overdischarge in Li/SOCl/sub 2/ cells
The high rate overdischarge (cell reversal) of Li/SOCl/sub 2/ cells through series string discharge or constant current discharge with an external power supply can result in thermal runaway. The chemical and physical processes occurring on overdischarge are not well understood. In the present work, the objective was to determine whether lithium deposited during overdischarge could lead to reactions which could cause spontaneous thermal excursions or explosions. Lithium deposition was investigated during both cathode and anode limited overdischarge at 40, 25 and -40/sup 0/C at current densities from 2 to 20 mA/cm/sup 2/. Optical microphotographs were taken of the dendrites while they were immersed in the SOCl/sub 2/ electrolyte during overdischarge or storage, and later, after cell disassembly, the dendrites and cathodes were examined by scanning electron microscopy (SEM).
- Research Organization:
- GTE Laboratories Incorporated, Waltham, MA
- OSTI ID:
- 6408301
- Report Number(s):
- CONF-831086-
- Journal Information:
- Proc. - Electrochem. Soc.; (United States), Journal Name: Proc. - Electrochem. Soc.; (United States) Vol. 84-1; ISSN PESOD
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ALKALI METALS
ANODES
CATHODES
CHEMISTRY
CHLORINE COMPOUNDS
CRYSTALS
CURRENT DENSITY
DENDRITES
DEPOSITION
ELECTRIC BATTERIES
ELECTRIC DISCHARGES
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTES
ELECTRON MICROSCOPY
ELEMENTS
HALOGEN COMPOUNDS
LITHIUM
LITHIUM-CHLORINE BATTERIES
MEDIUM TEMPERATURE
METAL-GAS BATTERIES
METALS
MICROSCOPY
OPTICAL MICROSCOPY
OXYCHLORIDES
OXYGEN COMPOUNDS
PHOTOGRAPHY
SCANNING ELECTRON MICROSCOPY
SULFUR COMPOUNDS