Novel rechargeable sodium batteries
The program was concerned with the development of a high energy density rechargeable sodium battery operating in the moderate temperature range of 175 to 200 C. The suitability of NaFeO{sub 2} and FeOCl as cathode materials in Na cells having the configuration--Molten Na/beta-Al{sub 2}O{sub 3}/Molten NaAlC{sub l4}, NaFeO{sub 2} or FeOC{sub l}--has been studied. Cells containing either NaFeO{sub 2} or FeOCl were found to cycle about 3 Na per Fe reversibly, in a two step discharge. The voltage profiles of cells containing either of these materials are strikingly similar. Chemical reactions between the NaAlC{sub l4} electrolyte and NaFeO{sub 2} or FeOCl have been proposed which suggest the formation of the identical intermediate in cells of either type. The quasi-theoretical specific energy is 1545 Wh/kg for the Na/NaFeO{sub 2} couple, and 1475 Wh/kg for the Na/FeOCl cell. When the possible involvement of one mole of NaAlCl4 in the discharge reaction is considered, these values become 628 Wh/kg for the former, and 603 Wh/kg for the latter.
- Research Organization:
- EIC Labs., Inc., Norwood, MA (United States)
- OSTI ID:
- 5501413
- Report Number(s):
- PB-91-184630/XAB; CNN: NSF-ISI87-60753
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250900* -- Energy Storage-- Batteries
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BATTERY CHARGING
CATHODES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
DESIGN
ELECTRIC BATTERIES
ELECTRIC POTENTIAL
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
ELEMENTS
ENERGY DENSITY
FLUIDS
HALIDES
HALOGEN COMPOUNDS
IRON CHLORIDES
IRON COMPOUNDS
LIQUID METALS
LIQUIDS
METALS
MOLTEN SALTS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SALTS
SODIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS