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

作者：Venkatesh G; Pralong V^*; Lebedev O I; Caignaert V; Bazin P; Raveau B

来源：Electrochemistry Communications, 2014, 40: 100-102.

DOI：10.1016/j.elecom.2013.11.004

• Vanadium oxides
• Na ion batteries
• NaVO3

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 < y < 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.