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Electrochemical cells with end-of-life indicator

  • US 4,619,874 A
  • Filed: 08/17/1984
  • Issued: 10/28/1986
  • Est. Priority Date: 05/06/1982
  • Status: Expired due to Fees
First Claim
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1. In an electrochemical cell including an oxidizable active anode material;

  • a non-consumable, electrically conducting, inert cathode current collector material, an electrolytic solution bridging the anode and cathode current collector, the solution including a liquid, inorganic oxyhalide or thiohalide solvent and a solute for rendering the electrolytic solution conductive of anode metal ions, the improvement comprising the addition to the cell of a quantity of an EOL component, as an initial dischargeable constituent thereof, having an eletropotential lower than that of the solvent and being selected from the group consisting of arsenic trichloride, arsenic trifluoride, arsenic tribromide, the vanadium halides, the transition metal sulfides and oxides, except for the actinide series, and technetium, and mixtures thereof whereby EOL indication in the form of a step discharge is provided during discharge of the cell.

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