Solid state electrolytes

Abstract

A solid state electrolyte comprising an ionically conducting product of a fused ternary mixture of lead fluoride, an alkali salt of sodium, potassium, rubidium or cesium in a range of 0.1 to 15.0 mole percent and a fluoride, nitrate or sulfate of magnesium, calcium, strontium or barium in a range of between 1 and 40 mole percent.

What is claimed is: .[. 
     
       1.  A solid state cell electrolyte comprising an ionically conducting produce of a fused ternary mixture of lead fluoride, an alkali salt selected from the group consisting of sodium, potassium rubidium and cesium salts in a range of between about 1.0 and about 15.0 mole percent and a fluoride, nitrate or sulfate of magnesium, calcium, strontium or barium in a range between about 1 and about 40 mole percent..]. .[.2. The solid state cell electrolyte of claim 1 wherein the alkali salt is selected from the group consisting of potassium fluoride, rubidium fluoride, cesium fluoride, potassium carbonate, potassium sulfate and potassium nitrate..]. .[.3. The solid state cell electrolyte of claim 1 wherein the fluoride is selected from the group consisting of strontium fluoride, calcium fluoride, barium fluoride and magnesium fluoride..]. .[.4. The solid state cell electrolyte of claim 1 wherein the nitrate is selected from the group consisting of calcium nitrate and strontium nitrate..]. .[.5. The solid state cell electrolyte of claim 1 wherein the sulfate is selected from the group consisting of calcium sulfate, barium sulfate and strontium sulfate..]. .[.6. The solid state electrolyte of claim 1 wherein the ionically conducting produce is formed from the fused ternary mixture 88PbF 2  -8SrF 2  -4KF..]. .[.7. The solid state electrolyte of claim 1 wherein the ionically conducting product is formed from the fused ternary mixture 94PbF 2  -3CaF 2  -3KF..]. .[.8. The solid state electrolyte of claim 1 wherein the ionically conducting product is formed from the fused ternary mixture 95PbF 2  -2CaF 2  -3KF..]. .[.9. The solid state electrolyte of claim 1 wherein the ionically conducting product is formed from the fused ternary mixture 94PbF 2  -2CaF 2  -4KF..]. .[.10. The solid state electrolyte of claim 1 wherein the ionically conducting product is formed from the fused ternary mixture 86PbF 2  -10SrF 2  -4KF..]. .[.11. The solid state electrolyte of claim 1 wherein the ionically conducting product is formed from the fused ternary mixture 86PbF 2  -10BaF 2  -4KF..]. .[.12. The solid state electrolyte of claim 1 wherein the ionically conducting product is formed from the fused ternary mixture 94PbF 2  -2MgF 2  -4KF..]. .Iadd.13. A solid state cell electrolyte comprising an ionically conducting product of a fused ternary mixture of lead fluoride, an alkali salt selected from the group consisting of sodium salts, cesium salts and nonfluoride-containing salts of potassium and rubidium in a range of between about 1.0 and about 15.0 mole percent and a fluoride, nitrate or sulfate of magnesium, calcium, strontium or barium in a range of between about 1 and about 40 mole percent. .Iaddend. .Iadd.14. The solid state cell electrolyte of claim 13 wherein the alkali salt is selected from the group consisting of cesium fluoride, potassium carbonate, potassium 
     
     
        sulfate and potassium nitrate. .Iaddend. .Iadd.15.  The solid state cell electrolyte of claim 13 wherein the fluoride is selected from the group consisting of strontium fluoride, calcium fluoride, barium fluoride and magnesium fluoride. .Iaddend. .Iadd.16. The solid state cell electrolyte of claim 13 wherein the nitrate is selected from the group consisting of calcium nitrate and strontium nitrate. .Iaddend. .Iadd.17. The solid state cell electrolyte of claim 13 wherein the sulfate is selected from the group consisting of calcium sulfate, barium sulfate and strontium sulfate. .Iaddend.