Electrochemical cell

Details Electrochemical cell Electrochemical cell

1981-12-21

1983-09-20

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Fluid active material or two-fluid electrolyte combination...

429178, H01M 614

Patent

active

044056940

ABSTRACT:
A primary electrochemical cell of a design for reducing parasitic self-discharge of the cell during storage and subsequent discharge of the cell. The cell includes a tubular porous carbon cathode structure within a metal housing of the cell and spaced from an anode structure by an insulative separator material. The carbon cathode structure and the anode structure are exposed to an electrolytic solution including a reducible soluble cathode (e.g., thionyl chloride) which is catalytically reduced during discharge of the cell at the surface of the carbon cathode structure. The anode structure includes an elongated, cylindrical, lithium member located centrally within, and spaced from, the housing, and an electrically-conductive metal assembly at the potential of the lithium electrode and connected between the lithium electrode and a feedthrough member provided in a top cover for the housing. All or portions of the electrically-conductive metal assembly, as well as the feedthrough member, are selectively covered with a sufficiently chemically-stable, catalytically-inert anti-parasitic discharge material for preventing the undesirable catalytic reduction of the soluble cathode at the surfaces of the electrically-conductive metal assembly and feedthrough member covered by the anti-parasitic discharge material.

REFERENCES:
patent: 3874929 (1975-04-01), Greatbatch
patent: 4032695 (1977-06-01), Coibion
patent: 4060668 (1977-11-01), Goebel
patent: 4168351 (1979-09-01), Taylor
patent: 4263378 (1981-04-01), Feiman et al.
patent: 4292346 (1981-09-01), Athearn
patent: 4307162 (1981-12-01), Athearn

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