Improvement of Li-ion conductivity in A-site disordering lithium-lanthanum-titanate perovskite oxides by adding LiF in synthesis

Toyoki Okumura, Koji Yokoo, Tomokazu Fukutsuka, Yoshiharu Uchimoto, Morihiro Saito, Koji Amezawa

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

La0.56-yLi0.33TiO3-3yF3y (y = 0.017, 0.05) were prepared by a conventional solid-state reaction from a mixture of La2O3, LiCO3, TiO2, and 10% excess LiF. The variation of the lattice parameter with increase of y value in La0.56-yLi0.33TiO3-3yF3y was different from that in conventional lithium-lanthanum-titanate series perovskite oxides, La0.56-yLi0.33+3yTiO3. Bulk Li-ion conductivities of the La0.56-yLi0.33TiO3-3yF3y are higher than those of La0.56-yLi0.33+3yTiO3. Li-ion conductivity of La0.56-yLi0.33TiO3-3yF3y (y = 0.017) was 2.30 × 10-3 S cm-1 at 30 °C, which is, to our knowledge, one of the highest Li-ion conductivities in the oxide compounds.

Original languageEnglish
Pages (from-to)536-538
Number of pages3
JournalJournal of Power Sources
Volume189
Issue number1
DOIs
Publication statusPublished - 2009 Apr 1

Keywords

  • Li-ion conductor
  • Perovskite structure
  • Solid-state electrolyte

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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