Characterization of DEB powders and pellets for CA/CaCrO/sub 4/ thermal batteries
A detailed characterization study was conducted of catholyte or depolarizer-electrolyte-binder (DEB) mixes used in Ca/CaCrO/sub 4/ thermal batteries. A number of the physical and chemical properties of powders and pellets of the DEB mixes were examined for correlation to electrochemical performance in 5-cell and, to a lesser extent, single-cell batteries. Powder characteristics evaluated included: chemical composition, segregation, flowability, bulk density, and BET surface area. Pellet characteristics evaluated included: break strength, forming force, electrolyte leakage at 400/sup 0/C after 0.5 h, and deformation at 530/sup 0/C under an applied pressure of 71 kPa (10.3 psi). Three series of DEB mixes were formulated at constant D/E weight ratios of 0.50, 0.64, and 0.80 to study the effect of SiO/sub 2/ binder at concentrations of 8 to 12 wt%. Three additional series of DEB mixes were formulated at constant E/B weight ratios of 4.5, 5.5, and 6.5 to study the effect of CaCrO/sub 4/ depolarizer at concentrations of 30 to 40 wt%. The BET surface area and chemical composition of DEB powders, and the electrolyte leakage and deformation of DEB pellets, could be correlated to the activated lives and pulse characteristics of the 5-cell batteries built with these mixes.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5417211
- Report Number(s):
- SAND-83-2270; ON: DE85017250
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250900* -- Energy Storage-- Batteries
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
BINDERS
CALCIUM
CALCIUM COMPOUNDS
CHALCOGENIDES
CHROMATES
CHROMIUM COMPOUNDS
DISPERSIONS
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELEMENTS
FABRICATION
METALS
MINERALS
MIXTURES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PELLETS
POWDERS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
THERMAL BATTERIES
TRANSITION ELEMENT COMPOUNDS