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Cathode current collector material for solid cathode cell

  • US 5,114,810 A
  • Filed: 02/05/1990
  • Issued: 05/19/1992
  • Est. Priority Date: 02/05/1990
  • Status: Expired due to Term
First Claim
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1. In an electrochemical cell comprising a lithium anode, a solid cathode material used in conjunction with a metal cathode current collector, and an ionically conductive electrolyte solution operatively associated with said anode and cathode, wherein the improvement comprises a cathode current collector of a highly alloyed nickel-containing ferritic stainless steel material, said material providing high corrosion resistance particularly where elevated temperature storage and performance is required thereby increasing cell longevity, said material comprising, by weight:

  • from about 27.0 percent to about 29.0 percent chromium;

    from about 2.0 percent to about 3.0 percent molybdenum;

    from about 3.0 percent to about 4.5 percent nickel;

    the sum of carbon plus nitrogen in an amount less than or equal to 0.045 percent;

    the sum of niobium plus zirconium in an amount of at least ten times the percent of carbon plus nitrogen; and

    the remainder being iron.

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