Investigating surface properties and lithium diffusion in brookite-TiO2

Corinne Arrouvel, Stephen Charles Parker

Research output: Contribution to journalArticle

Abstract

Surfaces properties of TiO2 in the brookite phase and the lithium diffusion are studied using density functional theory (DFT) and interatomic potential simulations. Simulations predict that the brookite surfaces have a higher intrinsic Lewis acidity compared to the other polymorphs due to the presence of four coordinated Ti atoms on the surface in contrast to the most stable surfaces of anatase and rutile which have five coordinated Ti surface atoms. The surface reactivity of the brookite is then expected to be higher for catalysis. The (210) surface is the most stable calculated surface and some experimental morphologies have been revisited. Regarding Li intercalation, the migration occurs along the c-direction and open channel surfaces are desired, therefore particles exposing the (001) surface. Those differences on chemical/physical properties highlight the importance to control the nanoparticle shapes for a given application.

Original languageEnglish
Pages (from-to)51-65
Number of pages15
JournalJournal of the Brazilian Chemical Society
Volume31
Issue number1
DOIs
Publication statusPublished - 1 Jan 2020

Keywords

  • Density functional theory
  • Interatomic potentials
  • Lithium battery
  • Morphologies
  • Surface properties

ASJC Scopus subject areas

  • Chemistry(all)

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