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Emery, N., Panabiere, E., Crosnier, O., Bach, S., Brousse, T., Willmann, P. & Pereira-Ramos, J. .-P. (2014) In operando X-ray diffraction study of Li7MnN4 upon electrochemical Li extraction-insertion: A reversible three-phase mechanism. J. Power Sources, 247 402–405.
Added by: Florent Boucher (2016-04-29 09:26:45) |
| Type de référence: Article DOI: 10.1016/j.jpowsour.2013.08.008 Numéro d'identification (ISBN etc.): 0378-7753 Clé BibTeX: Emery2014 Voir tous les détails bibliographiques  |
Catégories: ST2E Mots-clés: anode material, batteries, electrode material, In operando XRD, Li-ion batteries, Lithiated transition metal nitride Créateurs: Bach, Brousse, Crosnier, Emery, Panabiere, Pereira-Ramos, Willmann Collection: J. Power Sources |
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The Li7MnN4 structural response upon the first Li extraction insertion cycle is highlighted using in operando XRD experiments. A 3-phases mechanism involving two biphasic regions for 0.1 less than or similar to x less than or similar to 0.8 and 0.8 less than or similar to x less than or similar to 1.2 in Li7-xMnN4 and a solid solution behaviour (1.2 less than or similar to x less than or similar to 1.5) explains its electrochemical fingerprint. These successive structural transitions do not change the cubic symmetry of the cell and induce a limited cell contraction (similar to 7%) associated to a reversible mechanical strain. This finding partly explains the excellent cycle life of this promising negative electrode for Li-ion batteries. (C) 2013 Elsevier B.V. All rights reserved.
Added by: Florent Boucher |