Iron molybdate thin films prepared by sputtering and their electrochemical behavior in Li batteries
| Auteurs | Cotte S., Pelé V., Pecquenard B., Le Cras F., Grissa R., Bourgeois L., Sougrati M.T., Martinez H. |
| Year | 2018-0047 |
| Source-Title | Journal of Alloys and Compounds |
| Affiliations | CNRS, Univ. Bordeaux, Bordeaux INP, ICMCB, UPR 9048, 87 Avenue du Dr. Schweitzer, Pessac Cedex, France, CEA LETI, 17 rue des Martyrs, Grenoble, France, Université Grenoble Alpes, Grenoble, France, IPREM ECP – UMR CNRS 5254, Université de Pau et des Pays de l'Adour, Hélioparc Pau-Pyrénées, 2 Avenue du Président Angot, Pau Cedex 9, France, Université de Bordeaux, CNRS, ISM-UMR 5255, Groupe de Spectroscopie Moléculaire, 351 Cours de la Libération, Talence Cedex, France, Institut Charles Gerhardt, UMR 5253, PAC Balard, Place Eugène Bataillon, Montpellier, France, ICMCB, 87 avenue du Dr. Schweitzer, Pessac, France |
| Abstract | With the aim of developing 3V all-solid-state lithium microbatteries, Fe2(MoO4)3 thin films were prepared by radiofrequency magnetron sputtering from a home-made Fe2(MoO4)3 target using optimized sputtering conditions. In addition to elemental analyses, Mössbauer spectroscopy and XPS analyses, showing that Mo6+ and Fe3+ 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 Fe2(MoO4)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 Fe2(MoO4)3 – Li2Fe2(MoO4)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. © 2017 Elsevier B.V. |
| Author-Keywords | Iron molybdate, Lithium, Sputtering |
| Index-Keywords | Deposition, Electric batteries, Film preparation, Iron compounds, Lithium, Lithium batteries, Lithium compounds, Miniature batteries, Sputtering, Thin film lithium ion batteries, Electrochemical behaviors, Electrochemical performance, Iron molybdates, Lithium microbatteries, Post deposition annealing, Radio frequency magnetron sputtering, Sputtering conditions, Ssbauer spectroscopies, Thin films |
| ISSN | 9258388 |
| Lien vers article | Link |