Graphite aluminum- and silicon carbide-coated current collectors for sodium-sulfur cells
The electrical performance and corrosion of current collectors made from graphite foil bonded to aluminum and from stainless steel protected by silicon carbide coating are compared to current collectors protected by chromium coatings. The testing is done in corrosion cells operated under dynamic conditions in Na/sub 2/S/sub 5/ melt at 350/sup 0/C. The cells are operated under both cathodic and anodic potentials of 100-300 mV measured with respect to carbon reference electrodes. The current collectors made from graphite foil, 127 ..mu..m thick, bonded to aluminum have lowest total impedances (ohmic plus polarization) of 2.0 and 5.4 ..cap omega..-cm/sup 2/ under cathodic and anodic potential of 300 mV. The corresponding values for silicon carbide coatings, 1.8-2.0 ..mu..m thick, are 2.9 and 19.0 ..cap omega..-cm/sup 2/, and, for chromium coating about50 ..mu..m thick, 3.2 and 10.7 ..cap omega..-cm/sup 2/. No, or very little, corrosion is observed on the graphite/aluminum samples or on the silicon carbide-coated samples over a period of 2-3 months.
- Research Organization:
- Ford Motor Company, Dearborn, Michigan
- OSTI ID:
- 6401347
- Journal Information:
- J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 132:5; ISSN JESOA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250901* -- Energy Storage-- Batteries-- Design & Development
ALKALI METAL COMPOUNDS
ALLOYS
ALUMINIUM
BONDING
CARBIDES
CARBON
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COATINGS
CORROSION
CORROSION PROTECTION
CORROSION RESISTANT ALLOYS
DEPOSITION
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELEMENTAL MINERALS
ELEMENTS
FABRICATION
GRAPHITE
IRON ALLOYS
IRON BASE ALLOYS
JOINING
METAL-NONMETAL BATTERIES
METALS
MINERALS
NONMETALS
PERFORMANCE
POTENTIALS
PROTECTIVE COATINGS
SILICON CARBIDES
SILICON COMPOUNDS
SODIUM COMPOUNDS
SODIUM SULFIDES
SODIUM-SULFUR BATTERIES
STAINLESS STEELS
STEELS
SULFIDES
SULFUR COMPOUNDS
SURFACE COATING