Synthesis, structure, and ionic conductivity of Na5Li3Ti2S8

Fu Qiang Huang, Jiyong Yao, Zhanqiang Liu, Jianghua Yang, James A. Ibers*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The compound Na5Li3Ti2S8 has been synthesized by the reaction of Ti with a Na/Li/S flux at 723 K. Na5Li3Ti2S8 crystallizes in a new structure type with four formula units in space group C2/c of the monoclinic system. The structure contains three crystallographically independent Na+ cations and two crystallographically independent Li+ cations. Na5Li3Ti2S8 possesses a channel structure that features two-dimensional 2 [LiTiS43 -] layers built from Li(1)S4 and TiS4 tetrahedra. The layers, which are stacked along c, comprise eight-membered rings and sixteen-membered rings. Na(3)+ cations are located between the eight-membered rings and Na(1)+, Na(2)+, and Li(2)+ cations are located between the sixteen-membered rings. These cations are each octahedrally coordinated by six S2- anions. The ionic conductivity σT of Na5Li3Ti2S8 ranges from 8.8×10-6 S/cm at 303 K to 3.8×10-4 S/cm at 483 K. The activation energy Ea is 0.40 eV.

Original languageEnglish (US)
Pages (from-to)837-841
Number of pages5
JournalJournal of Solid State Chemistry
Volume181
Issue number4
DOIs
StatePublished - Apr 1 2008

Keywords

  • Channel structure
  • Ionic conductivity
  • Sodium lithium titanium sulfide
  • Synthesis
  • X-ray structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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