Iron molybdate thin films prepared by sputtering and their electrochemical behavior in Li batteries

Abstract : With the aim of developing 3V all-solid-state lithium microbatteries, Fe$_2$(MoO$_4)_3$ thin films were prepared by radiofrequency magnetron sputtering from a home-madeFe$_2$(MoO$_4)_3$ target using optimized sputtering conditions. In addition to elemental analyses, Mössbauer spectroscopy and XPS analyses, showing that Mo$^{6+}$ and Fe$^{3+}$ are the main detected species, confirmed the stoichiometric character of the films. Post-deposition annealing was necessary to form well-crystallized thin films. The best electrochemical performance was obtained with those annealed at 500 °C which were able to deliver a stable reversible capacity close to the theoretical one, i.e. 2 Li$^+$ per Fe$_2$(MoO$_4)_3$ formula unit. The corresponding voltage curve displays a plateau with a low hysteresis located at 3.0 V/Li$^+$/Li and related to the Fe$_2$(MoO$_4)_3$ – Li$_2$Fe$_2$(MoO$_4)_3$ two-phase system. Therefore, it was demonstrated for the first time the possible use of Fe2(MoO4)3 thin films as positive electrodes for 3 V lithium microbatteries.
Type de document :
Article dans une revue
Journal of Alloys and Compounds, Elsevier, 2018, 735, pp.1454-1462. 〈10.1016/j.jallcom.2017.11.231〉
Domaine :
Liste complète des métadonnées

Littérature citée [24 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-01671425
Contributeur : Stéphane Toulin <>
Soumis le : jeudi 22 février 2018 - 14:09:16
Dernière modification le : mardi 17 juillet 2018 - 16:47:56
Document(s) archivé(s) le : mercredi 23 mai 2018 - 13:33:54

Fichier

2018-005.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Licence


Distributed under a Creative Commons Paternité - Pas d'utilisation commerciale - Pas de modification 4.0 International License

Identifiants

Citation

Stéphane Cotte, Vincent Pelé, Brigitte Pecquenard, Frédéric Le Cras, Rabeb Grissa, et al.. Iron molybdate thin films prepared by sputtering and their electrochemical behavior in Li batteries. Journal of Alloys and Compounds, Elsevier, 2018, 735, pp.1454-1462. 〈10.1016/j.jallcom.2017.11.231〉. 〈hal-01671425〉

Partager

Métriques

Consultations de la notice

245

Téléchargements de fichiers

72