Solid state, ambient temperature electrochemical cell

  • US 4,268,587 A
  • Filed: 10/11/1977
  • Issued: 05/19/1981
  • Est. Priority Date: 10/11/1977
  • Status: Expired due to Term
First Claim
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1. A sealed solid state, ambient temperature electrochemical cell comprises a casing including an anode compartment and a cathode compartment, the compartments insulated electrically from each other, an anode positioned within and in electrical contact with the anode compartment, the anode selected from the class consisting of lithium, lithium as an amalgam, alloys of lithium with aluminum or silicon, sodium, sodium as an amalgam or alloys of sodium with aluminum or silicon, a cathode positioned within and in electrical contact with the cathode compartment, the cathode comprising pressed sulfur powder and carbon powder containing therein a nominal amount of a non-aqueous solvent with ionic conductivity enhancing materials, and a solid ion-conducting electrolyte positioned between the anode and the cathode and in contact with both the anode and the cathode, the solid electrolyte selected from the class consisting of sodium beta-alumina, sodium beta"-alumina, or lithium-sodium aluminate having an approximate composition of LiNaO.9Al2 O3 of which 1.3 to 85.0 percent of the total alkali ion content is lithium.

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