Unexpected formation by pulsed laser deposition of nanostructured Fe/olivine thin films on MgO substrates

Journal Article · Tue Feb 15 00:00:00 EST 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.11.022· OSTI ID:21494210

Legrand, C; Dupont, L; Davoisne, C ^[1]; Le Marrec, F ^[2]; Perriere, J ^[3]; Baudrin, E ^[1]

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1. Laboratoire de Reactivite et Chimie des Solides, UMR CNRS 6007, Universite de Picardie Jules Verne, 33, rue Saint Leu, 80039 Amiens CEDEX (France)
2. Laboratoire de Physique de la Matiere Condensee, UFR des Sciences, Universite de Picardie Jules Verne, 33, rue Saint Leu, 80039 Amiens CEDEX (France)
3. Institut des NanoSciences de Paris, UMR CNRS 7588, Universite Paris 6, 140 rue de Lourmel, 75015 Paris (France)

Olivine-type LiFePO{sub 4} thin films were grown on MgO (1 0 0) substrates by pulsed laser deposition (PLD). The formation of an original nanostructure is evidenced by transmission electron microscopy measurements. Indeed, on focused ion beam prepared cross sections of the thin film, we observe, the amazing formation of metallic iron/olivine nanostructures. The appearance of such a structure is explained owing to a topotactic relation between the two phases as well as a strong Mg diffusion from the substrate to the film surface. Magnesium migration is thus concomitant with the creation of metallic iron domains that grow from the core of the film to the surface leading to large protuberances. To the best of our knowledge, this is the first report on iron extrusion from the olivine-type LiFePO{sub 4}. -- Graphical Abstract: HRTEM image of olivine/Fe nanostructure obtained by PLD. Display Omitted Research highlights: {yields} This manuscript describes the attempt to prepare textured LiFePO{sub 4} by PLD. This is presently a challenge to better understand the physical properties of the material, used as cathode in lithium ion batteries. {yields} We describe for the first time the iron extrusion from this material. Indeed, there were recent reports on the possible non-stoichiometry, i.e. lithium or oxygen. However, on the iron side, only some defect were observed for hydrothermally prepared material but the extrusion is new in this paper. {yields} We prepared interesting nanostructures which could be used for different fundamental studies: electric and magnetic measurements.

• OSTI ID: 21494210
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 2; Other Information: DOI: 10.1016/j.jssc.2010.11.022; PII: S0022-4596(10)00533-5; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ELECTRIC BATTERIES
ENERGY BEAM DEPOSITION
EXTRUSION
HYDROTHERMAL SYNTHESIS
ION BEAMS
IRON
LASER RADIATION
LITHIUM
LITHIUM IONS
MAGNESIUM OXIDES
NANOSTRUCTURES
OLIVINE
PHYSICAL PROPERTIES
PULSED IRRADIATION
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
BEAMS
CHALCOGENIDES
CHARGED PARTICLES
DEPOSITION
ELECTROCHEMICAL CELLS
ELECTROMAGNETIC RADIATION
ELECTRON MICROSCOPY
ELEMENTS
ENERGY STORAGE SYSTEMS
ENERGY SYSTEMS
FABRICATION
FILMS
IONS
IRRADIATION
MAGNESIUM COMPOUNDS
MATERIALS WORKING
METALS
MICROSCOPY
MINERALS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SILICATE MINERALS
SURFACE COATING
SYNTHESIS
TRANSITION ELEMENTS