Amorphous sodium vanadate Na1.5+yVO3, a promising matrix for reversible sodium intercalation

G. Venkatesh (1) , Valérie Pralong (1) , O. I Lebedev (1) , V. Caignaert (1) , Philippe Bazin (2) , B. Raveau (1)

1 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
2 LCS - Laboratoire catalyse et spectrochimie

Sodium insertion into the vanadate NaVO3 shows the formation of an amorphous phase with the composition Na1.5 + yVO3. The latter phase exhibits reversible electrochemical sodium intercalation/de-intercalation properties through a solid solution-like process, for 0 \textless y \textless 0.7, with redox cycling at 1.8 V vs. Na+/Na and a capacity of 150 mAh/g. This result opens the route to the investigation of amorphous matrices involving transition metal oxides for sodium ion battery applications. (C) 2013 Elsevier B.V. All rights reserved.

Mots clés: Na ion batteries; NaVO3; Vanadium oxides

Domaines: Chimie

G. Venkatesh, Valérie Pralong, O. I Lebedev, V. Caignaert, Philippe Bazin, et al.. Amorphous sodium vanadate Na1.5+yVO3, a promising matrix for reversible sodium intercalation. Electrochemistry Communications, 2014, 40, pp.100-102. ⟨10.1016/j.elecom.2013.11.004⟩. ⟨hal-01840269⟩