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OwnerArnold Lunden, Bjorn Heed +1inventors
InventorsArnold Lunden, Bjorn Heed, Arnold J. L. Kvist
Estimating the term…
Electrochemical cells are provided having solid electrolytes of enhanced conductivity at low temperatures. These electrolytes comprise binary and ternary mixtures of salts having the compositions--M.sub.2 SO.sub.4 --(Me).sub.x SO.sub.4 or M.sub.2 SO.sub.4 --(Me).sub.x SO.sub.4 .dbd.MyX, respectively where M is--an ion of an alkali metal, Ag, or a mixture thereof, Me is an ion of a divalent metal or Ag, x is 1 or 2, x being 1 when Me is a divalent metal ion and 2 when Me is Ag, X is a halogen or sulfate ion, and y is 1 or 2, y being 1 when X is halogen and 2 when X is sulfate. In addition to having a high conductivity at lower operating temperatures, the phases are stable at least 100.degree. C. above the transformation points.
An electrochemical cell having a solid electrolyte of high conductivity comprising a mixture of at least two salts of the composition M.sub.2 SO.sub.4 --Me.sub.x SO.sub.4 where M is an ion of one or more alkali metals, Ag or a mixture thereof, Me is an ion of a divalent metal or Ag and x is 1 when Me is divalent and 2 when Me is Ag, with the proviso that at least when Me is Ag, the mixture further contains a salt of the composition Ma.sub.x SO.sub.4 or Ma Y.sub.z where Ma is an ion of an alkali metal, Ag or a divalent metal other than M, Y is a halogen, x is 1 when Ma is divalent and 2 when Ma is an alkali metal or silver and z is 1 when Ma is an alkali metal or silver and 2 when Ma is divalent, and wherein the alkali metal salt is present in the electrolyte salt mixture in an amount of at least 50 mole percent.
A method of producing an electrochemical cell having a solid electrolyte of high conductivity which comprises preparing a mixture of at least two salts of the composition M.sub.2 SO.sub.4 --Me.sub.x SO.sub.4 where m is an ion of one or more alkali metals, Ag or a mixture thereof, Me is an ion of a divalent metal or Ag and x is 1 when Me is divalent and 2 when Me is Ag, with the proviso that at least when Me is Ag, the mixture further contains a salt of the composition Ma.sub.x SO.sub.4 or Ma Y.sub.z where Ma is an ion of an alkali metal, Ag or a divalent metal other than M, Y is a halogen, x is 1 when Ma is divalent and 2 when Ma is an alkali metal or silver and z is 1 when Ma is an alkali metal or silver and 2 when Ma is divalent, and wherein the alkali metal salt is present in the electrolyte salt mixture in an amount of at least 50 mole persent;
Dependencies are inferred from the claim text.