Amorphous sodium vanadate Na_1.5 + yVO₃, a promising matrix for reversible sodium intercalation

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• 作者：G. Venkatesh ; V. Pralong ; O.I. Lebedev ; V. Caignaert ; P. Bazin ; B. Raveau
• 关键词：Vanadium oxides ; Na ion batteries ; NaVO3
• 刊名：Electrochemistry Communications
• 出版年：March, 2014
• 年：2014
• 卷：40
• 期：Complete
• 页码：100-102
• 全文大小：1167 K

文摘

Sodium insertion into the vanadate NaVO₃ shows the formation of an amorphous phase with the composition Na_1.5 + 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.