Electrochemical cells with end-of-life indicator

Details Electrochemical cells with end-of-life indicator Electrochemical cells with end-of-life indicator

1984-08-17

1986-10-28

LeFevour, Charles F.

Chemistry: electrical current producing apparatus, product, and

With measuring, testing, or indicating means

For charge or liquid level

429196, 429199, 429105, H01M 1048

Patent

active

046198741

ABSTRACT:
Electrochemical cells having an oxidizable active anode material, a solid, non-reactive electronically conductive cathode current collector, and an electrolytic solution between and in contact with the anode and the cathode current collector, the electrolytic solution comprising a solvent cathode component which is a liquid oxyhalide or thiohalide. And anode ion transporting solute component dissolved therein for rendering the electrolytic solution conductive of anode metal ions, the electrolytic solution having an end-of-life (EOL) component associated therewith, the EOL component being selected from the group consisting of the Main Group V halides preferably arsenic tribromide (AsBr.sub.3), arsenic trichloride (AsCl.sub.3), arsenic trifluoride (AsF.sub.3), vanadium halides, transition metal sulfides, oxides, except for the actinide series and technetium, and mixtures thereof to provide end-of-life indication. The EOL component selected in any specific instance has an electropotential which is lower than that of the specific solvent cathode component used i.e., the primary cathode material in the electrolytic solution.

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