Solid Electrolytes: Alkali-Ion Transport in Skeleton Structures

Abstract

We have demonstrated the existence of fast, three-dimensional Na+-ion transport in the system Na1+3yZR2(P1-YSIyO4)3 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)

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Document Details

Document Type
Technical Report
Publication Date
Dec 31, 1975
Accession Number
ADA022199

Entities

People

  • H. Y-p. Hong
  • J. A. Kafalas
  • John B. Goodenough
  • K. Dwight

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alkali Metals
  • Chemical Analysis
  • Chemical Engineering
  • Chemical Stability
  • Chemical Synthesis
  • Chemistry
  • Construction
  • Crystal Structure
  • Distortion
  • Fabrication
  • High Temperature
  • Ion Exchange
  • Materials
  • Materials Science
  • Measurement
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Battery Technology and Engineering
  • Semiconductor Device Technology
  • Surface Engineering/Surface Coating Technology.