Phase stability frustration on ultra-nanosized anatase TiO 2 - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Scientific Reports Année : 2015

Phase stability frustration on ultra-nanosized anatase TiO 2

Résumé

This work sheds light on the exceptional robustness of anatase TiO 2 when it is downsized to an extreme value of 4â €‰nm. Since at this size the surface contribution to the volume becomes predominant, it turns out that the material becomes significantly resistant against particles coarsening with temperature, entailing a significant delay in the anatase to rutile phase transition, prolonging up to 1000â €‰°C in air. A noticeable alteration of the phase stability diagram with lithium insertion is also experienced. Lithium insertion in such nanocrystalline anatase TiO 2 converts into a complete solid solution until almost Li 1 TiO 2, a composition at which the tetragonal to orthorhombic transition takes place without the formation of the emblematic and unwished rock salt Li 1 TiO 2 phase. Consequently, excellent reversibility in the electrochemical process is experienced in the whole portion of lithium content.
Fichier principal
Vignette du fichier
srep10928.pdf (3.31 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-01684677 , version 1 (28-05-2021)

Licence

Identifiants

Citer

S. Patra, C. Davoisne, Houssny Bouyanfif, Dominique Foix, F. Sauvage. Phase stability frustration on ultra-nanosized anatase TiO 2. Scientific Reports, 2015, 5, ⟨10.1038/srep10928⟩. ⟨hal-01684677⟩
70 Consultations
27 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More