A study of the NaxTiO2 system by electrochemical deintercalation
Résumé
The electrochemical deintercalation from the sheet oxide NaTiO2 leads to new NaxTiO2 materials. The deintercalation is reversible over the range 0.70 < x < 1, whereas irreversible modifications of the host structure occur by overvoltage (x < 0.70). This behavior, which can be explained by migration of some titanium ions from the slabs to the intersheet space, may be considered as a 2D -> 3D structural transition.