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Electrochemical cell

  • US 4,581,305 A
  • Filed: 06/25/1984
  • Issued: 04/08/1986
  • Est. Priority Date: 06/25/1984
  • Status: Expired due to Term
First Claim
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1. An electrochemical cell comprising:

  • an outer conductive housing, an lithium anode within said housing;

    a cathode material within said housing, said cathode material being a mixture of a low conductivity cupric halide and a higher conductivity cupric sulfide with no free sulfur in the cell, said cupric sulfide being less electrochemically reactive with said anode material than said cupric halide; and

    porous insulating means with a non-aqueous electrolyte contained therein positioned between said anode material and said cathode material, a first voltage potential being developed between said cupric halide and said anode material until said cupric halide is depleted so that a second voltage potential different than the first voltage potential can be developed between said less reactive cupric sulfide and said anode material after said cupric halide is depleted in order to indicate depletion of said cupric halide and the approaching end of life of said cell.

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