Structural and electrical properties of ceramic li-ion conductors based on Li1.3Al0.3Ti1.7(PO4)(3)-LiF - Université de Lille
Article Dans Une Revue Journal of the European Ceramic Society Année : 2020

Structural and electrical properties of ceramic li-ion conductors based on Li1.3Al0.3Ti1.7(PO4)(3)-LiF

Konrad Kwatek
  • Fonction : Auteur
Wioleta Slubowska
  • Fonction : Auteur
Jan L. Nowinski
  • Fonction : Auteur

Résumé

The work presents the investigations of Li1.3Al0.3Ti1.7(PO4)3-xLiF Li-ion conducting ceramics with 0 ≤ x ≤ 0.3 by means of X-ray diffractometry (XRD), 7Li, 19F, 27Al and 31P Magic Angle Spinning Nuclear Magnetic Resonance (MAS NMR) spectroscopy, thermogravimetry (TG), scanning electron microscopy (SEM), impedance spectroscopy (IS) and density method. It has been shown that the total ionic conductivity of both as-prepared and ceramic Li1.3Al0.3Ti1.7(PO4)3 is low due to a grain boundary phase exhibiting high electrical resistance. This phase consists mainly of berlinite crystalline phase as well as some amorphous phase containing Al3+ ions. The electrically resistant phases of the grain boundary decompose during sintering with LiF additive. The processes leading to microstructure changes and their effect on the ionic properties of the materials are discussed in the frame of the brick layer model (BLM). The highest total ionic conductivity at room temperature was measured for LATP-0.1LiF ceramic sintered at 800 °C and was equal to σtot = 1.1 × 10−4 S cm−1.

Domaines

Catalyse
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Dates et versions

hal-04305632 , version 1 (24-11-2023)

Identifiants

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Konrad Kwatek, Wioleta Slubowska, Julien Trebosc, Olivier Lafon, Jan L. Nowinski. Structural and electrical properties of ceramic li-ion conductors based on Li1.3Al0.3Ti1.7(PO4)(3)-LiF. Journal of the European Ceramic Society, 2020, Journal of the European Ceramic Society, 40 (1), pp.85-93. ⟨10.1016/j.jeurceramsoc.2019.08.032⟩. ⟨hal-04305632⟩
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