Lithium Diffusion Pathways in β-Li2TiO3: A Theoretical Study

Mazharul M. Islam, Thomas Bredow

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In recent experimental studies based on NMR techniques, the ion dynamics in β-Li2TiO3 has been discussed controversially. In order to shed light on this discussion, Li ion diffusion processes in β-Li2TiO3 are investigated theoretically using periodic quantum-chemical DFT methods. It is observed that Li+ migrates along the ab plane as well as in the direction perpendicular to the LiTi2 layers with the activation energies ranging between 0.44 and 0.54 eV, suggesting a slow ion dynamics. In addition, the structural, electronic, and defect properties and the electric field gradient (EFG) parameters at Li positions of β-Li2TiO3 are calculated. According to our results, β-Li2TiO3 is a wide gap insulator with an indirect band gap at F-C. The calculated defect formation energy values as well as the EFG parameters show that there are three different Li sites in the structure, namely, Li(1), Li(2), and Li(3), which are in well accord with the experiment.

Original languageEnglish
Pages (from-to)7061-7066
Number of pages6
JournalJournal of Physical Chemistry C
Volume120
Issue number13
Early online date29 Mar 2016
DOIs
Publication statusPublished - 21 Apr 2016

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry

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