Amorphous sodium vanadate Na1.5 + yVO3, a promising matrix for reversible sodium intercalation |
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| Institution: | 1. Laboratoire de Cristallographie et Sciences des Matériaux CRISMAT, ENSICAEN, Université de Caen, CNRS, 6 Bd Maréchal Juin, F-14050 Caen 4, France;2. Laboratoire Catalyse et Spectrochimie, ENSICAEN, Université de Caen, CNRS, 6 Bd Maréchal Juin, F-14050 Caen 4, France;1. Centre of Transport Studies, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands;2. Municipality of Ede, P.O. Box 9022, 6710, HK EDE, The Netherlands |
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| Abstract: | 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. |
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