Improvements in Li(Si)/FeS/sub 2/ thermal battery technology
Potential improvements in Li(Si)/FeS/sub 2/ thermal battery technology were evaluated using as the test vehicle a 28 +- 4-V, 400-cm/sup 3/ battery discharged through a 28-..cap omega.. load. Successful improvements included incorporating a catholyte additive to improve voltage regulation during discharge, changing the catholyte composition and blending procedure to increase life and current carrying capability, changing the anode composition to obtain better voltage regulation, and optimizing the heat and mass input. One end-of-life mechanism for higher current drain batteries was determined to be electrolytic freeze-out at the anode at temperatures that increase as the current density increases. The increase in freezing temperature was caused by a change in the K/sup +//Li/sup +/ ratio in the electrolyte near the anode as the anode discharged. A balanced ratio of cathode to anode weight was determined for the two catholytes and anode powders considered. The balance was based on electrode polarization at various resistive loads.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5335125
- Report Number(s):
- SAND-82-0565; ON: DE82017779
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
THERMAL BATTERIES
DESIGN
ANODES
ELECTRIC CONDUCTIVITY
ELECTRIC POTENTIAL
ELECTRODES
ELECTROLYTES
IRON SULFIDES
LITHIUM
POLARIZATION
POTASSIUM
SERVICE LIFE
SILICON
TEMPERATURE DEPENDENCE
ALKALI METALS
CHALCOGENIDES
ELECTRIC BATTERIES
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELEMENTS
IRON COMPOUNDS
METALS
PHYSICAL PROPERTIES
SEMIMETALS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
250901* - Energy Storage- Batteries- Design & Development