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Marino, C., Dupre, N. & Villevieille, C. (2017) Elucidation of reaction mechanisms of Ni2SnP in Li-ion and Na-ion systems. Journal of Power Sources, 365 339–347.
Added by: Richard Baschera (2017-11-03 09:09:14) Last edited by: Richard Baschera (2017-11-03 09:25:32) |
| Type de référence: Article DOI: 10.1016/j.jpowsour.2017.08.096 Clé BibTeX: Marino2017 Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, ST2E Créateurs: Dupre, Marino, Villevieille Collection: Journal of Power Sources |
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| Résumé |
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Electrochemical performance of Ni2SnP was assessed in Li-ion and Na-ion battery systems. When cycled versus Li, Ni2SnP exhibited a reversible specific charge of 700 mAh.g(-1) (theoretical specific charge: 742 mAh.g(-1)). In the Na system, the specific observed charge was ca. 200 mAh.g(-1) (theoretical specific charge: 676 mAh.g(-1)). X-ray diffraction, Ni K-edge X-ray absorption spectroscopy, and P-31 and Li-7/Na-23 nuclear magnetic resonance spectroscopy were used to elucidate the electrochemical mechanisms in both systems. Versus Li, Ni2SnP undergoes a conversion reaction resulting in the extrusion of Ni and the alloying of Li-Sn and Li-P. On delithiation, the material partially recombines into a Sn- and Ni-deficient form. In the Na system, Ni2SnP reacts through the conversion of P into Na3P. These results indicate that the recombination of the pristine material (even partially) increases cycling stability. (C) 2017 Elsevier B.V. All rights reserved.
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