Fluoride solid electrolytes : from microcrystalline to nanostructured tysonite-type La0.95Ba0.05F2.95
CHABLE, Johann
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Institut des Molécules et Matériaux du Mans [IMMM]
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Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Institut des Molécules et Matériaux du Mans [IMMM]
CHABLE, Johann
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Institut des Molécules et Matériaux du Mans [IMMM]
< Reduce
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Institut des Molécules et Matériaux du Mans [IMMM]
Language
en
Article de revue
This item was published in
Journal of Alloys and Compounds. 2017-01, vol. 692, p. 980-988
Elsevier
English Abstract
Pure tysonite La0.95Ba0.05F2.95 is nanostructured by using the ball-milling technique. Size and pollution rate are minimized using the statistical method of Design of Experiment. The nanocrystalline powders are studied by ...Read more >
Pure tysonite La0.95Ba0.05F2.95 is nanostructured by using the ball-milling technique. Size and pollution rate are minimized using the statistical method of Design of Experiment. The nanocrystalline powders are studied by X-ray and TEM analyses and by 19F solid state NMR and impedance spectroscopies. Specific surface area and F/OH substitution rate are estimated by BET measurements and thermal analysis (TGA-MS), respectively. Fluorine environments and mobilities are discussed on the basis of 19F solid state NMR data, both prior and after thermal treatment. The ionic conductivity, evaluated from sintered pellets, is compared at different thermal treatment temperatures. Thermal treatment tends to reduce microstrains up to 500 °C and to increase the grain size above this temperature. Optimal conductivity is obtained for a thermal treatment from 700 °C and no significant improvement of the conductivity by nanostructuration is observed.Read less <
English Keywords
Solid electrolytes
Rare earth fluorides
Tysonite type structure
Nanostructuration
Ball-milling
Ionic conductivity
Impedance spectroscopy
Design of experiment
19F solid state NMR
Pellet shaping
ANR Project
Batteries tout solide à ions fluorure - ANR-12-PRGE-0009
Origin
Hal imported