Isabel K Lloyd

US Patent:

45268444, Jul 2, 1985

Filed:

Apr 14, 1983

Appl. No.:

6/485087

Inventors:

Bulent E. Yoldas - Murrysville PA
Isabel K. Lloyd - Murrysville PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H01M 810
H01M 618

US Classification:

429 30

Abstract:

Disclosed is a nasicon compound and a method of making it. The nasicon compound is rhombohedral at room temperature and has the general formula M. sub. 1+x+O. 02y+0. 04z M'. sub. 2-0. 02(y+z) M". sub. 02y M"'. sub. 02z M"". sub. x M""'. sub. 3-x O. sub. 12 where M is selected from lithium, sodium, calcium, and silver, M' is selected from zirconium, titanium or hafnium, M" is selected from yttrium, scandium or lanthanum, M"' is selected from magnesium, calcium, strontium or barium, M"" is selected from silicon and germanium, M""' is selected from phosphorous and arsenic, x is about 1. 6 to about 2. 2, y is about 0 to about 15, and z is about 0 to about 15. The preferred compound is Na. sub. 1+x Zr. sub. 2 Si. sub. x P. sub. 3-x O. sub. 12. A sodium sulfur battery using the nasicon compound is also disclosed.