Electrochemical cell

Details Electrochemical cell Electrochemical cell

1981-12-21

1983-03-15

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

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

429178, H01M 230

Patent

active

043768113

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 disposed 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 at the surface of the carbon cathode structure during discharge of the cell.
The anode structure includes an elongated, cylindrical, lithium electrode located centrally within, and spaced from, the housing; an elongated solid or hollow glass or ceramic member having a first portion embedded within the lithium electrode and a second portion extending outwardly from the lithium electrode; an electrically-conductive metal material disposed on the first portion of the glass or ceramic member and in physical and electrical contact with the lithium electrode; and an electrically-conductive, flexible, metal jumper element connected between the electrically-conductive metal material and an elongated metal feedthrough member in a top cover of the cell. The jumper element and 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 jumper element 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: 4307161 (1981-12-01), Athearn

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