Structural environment of chloride ion-conducting solids based on lanthanum oxychloride

Naoyoshi Nunotani, Muhammad Radzi Iqbal Bin Misran, Miki Inada, Tomoki Uchiyama, Yoshiharu Uchimoto, Nobuhito Imanaka

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The effect of the structural environment on the Cl ion conductivity was demonstrated in LaOCl-based solid electrolytes. By replacing the La3+ site with lower-valent Mg2+ or Ca2+ ions, the conductivity was enhanced owing to the formation of a Cl ion vacancy. Despite the same dopant content, the conductivity of La0.8Ca0.2OCl0.8 was considerably greater than La0.8Mg0.2OCl0.8. This enhancement of the conductivity was influenced by the high ionicity of the Cl ions, which facilitated the weakening of the La-Cl bond cleavage to conduct inside the lattice. The elongation of the La-La distance, associated with the Cl ion conduction, could also cause an increase of the conductivity.

Original languageEnglish
Pages (from-to)297-303
Number of pages7
JournalJournal of the American Ceramic Society
Issue number1
Publication statusPublished - Jan 1 2020

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry


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