Accession Number:

ADA022199

Title:

Solid Electrolytes: Alkali-Ion Transport in Skeleton Structures

Descriptive Note:

Semiannual technical summary no. 2, 1 Jul-31 Dec 1975

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Report Date:

1975-12-31

Pagination or Media Count:

42.0

Abstract:

We have demonstrated the existence of fast, three-dimensional Na-ion transport in the system Na13yZR2P1-YSIyO43 for less than or equal to 1. At 300 degree C, the operating temperature of a Na-S battery, the resistivity 5 ohms-cm for Na-ion transport in Na3Zr2PSi2O12 is competitive with the best beta-alumina. The activation energy for Na-ion transport, about 0.26 eV, is about 0.08 eV higher than that of beta-alumina, which makes this compound superior to the best beta-alumina at temperatures greater than 300 degree C, inferior at lower temperatures. The compound is stable in molten sodium and can be sintered at 1250 degree C. We have elected to concentrate on the fabrication of ceramic cups suitable for cell construction in order to test the chemical stability of this compound under the operating conditions of a Na-S cell. Author

Subject Categories:

  • Physical Chemistry
  • Test Facilities, Equipment and Methods
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE