Positive electrode current collector for liquid metal cells

Chemistry: electrical current producing apparatus – product – and – Deferred action type – Responsive to heat

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429245, 429221, H01M 452, H01M 636

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active

044408374

ABSTRACT:
A current collector for the positive electrode of an electrochemical cell with a positive electrode including a sulfide. The cell also has a negative electrode and a molten salt electrolyte including halides of a metal selected from the alkali metals and the alkaline earth metals in contact with both the positive and negative electrodes. The current collector has a base metal of copper, silver, gold, aluminum or alloys thereof with a coating thereon of iron, nickel, chromium or alloys thereof. The current collector when subjected to cell voltage forms a sulfur-containing compound on the surface thereby substantially protecting the current collector from further attack by sulfur ions during cell operation. Both electroless and electrolytic processes may be used to deposit coatings.

REFERENCES:
patent: 3749603 (1973-07-01), Stringham et al.
patent: 4011373 (1977-03-01), Kaun et al.
patent: 4172926 (1979-10-01), Shimotake et al.
patent: 4228224 (1980-10-01), Heredy et al.
ANL/OEPM 79-14, Annual Report for 1979, Research, Development and Demonstration of Nickel-Iron Batteries for Electric Vehicle Propulsion, pp. 33-37, 1980.

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