Solid electrolyte for sodium-sulfur secondary cell and process f

Details Solid electrolyte for sodium-sulfur secondary cell and process f Solid electrolyte for sodium-sulfur secondary cell and process f

1994-10-31

1996-04-23

Gorgos, Kathryn

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

501 41, 501119, 501153, H01M 618

Patent

active

055102107

ABSTRACT:
The present invention is directed to a solid electrolyte and a process for making the same for a sodium-sulfur secondary cell including a composition of 7.0 to 10.0 weight percent of Na.sub.2 O, 0.5 to 3.5 weight percent of MgO or 0.7 to 1.0 weight percent of Li.sub.2 O, 0.01 to 0.6 weight percent of WO.sub.3, and the balance of Al.sub.2 O.sub.3. The solid electrolyte is prepared by mixing Na.sub.2 O, MgO, Li.sub.2 O, WO.sub.3, and Al.sub.2 O.sub.3, calcining the resulting mixture, pulverizing the calcined body, and subjecting the resulting powders to sintering. Alternatively, the solid electrolyte is prepared by mixing Na.sub.2 O, MgO, or Li.sub.2 O, and Al.sub.2 O.sub.3 with one another, calcining the mixture, adding WO.sub.3 to the calcined body, pulverizing the resulting material, and subjecting the resulting powders to sintering.

REFERENCES:
patent: 3950463 (1976-04-01), Jones
patent: 4381968 (1983-05-01), Singh
patent: 4491392 (1985-01-01), Elmer et al.
patent: 4539276 (1985-09-01), Harbach
patent: 5229340 (1993-07-01), Nemoto et al.

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