Lithium conducting solid electrolyte Li1.3Al0.3Ti1.7(PO4)3 obtained via solution chemistry

Sandrine Duluard (1) , Aude Paillassa (1) , Laurent Puech (2) , Philippe Vinatier (2) , Viviane Turq (1) , Patrick Rozier (1) , Pascal Lenormand (1) , P.-L. Taberna (1) , Patrice Simon (1) , Florence Ansart (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

NaSICON-type lithium conductor Li1.3Al0.3Ti1.7(PO4)3 (LATP) is synthesized with controlled grain size and composition using solution chemistry. After thermal treatment at 850 °C, sub-micronic crystallized powders with high purity are obtained. They are converted into ceramic through Spark Plasma Sintering at 850-1000 °C. By varying the processing parameters, pellet with conductivities up to 1.6 × 10−4 S/cm with density of 97% of the theoretical density have been obtained. XRD, FEG-SEM, ac-impedance and Vickers indentation were used to characterize the products. The influence of sintering parameters on pellet composition, microstructure and conductivity is discussed in addition to the analysis of the mechanical behavior of the grains interfaces.

Mots clés: Powders-chemical preparation; Sintering; Microstructure; Ionic conductivity; Batteries

Domaines: Matériaux

Sandrine Duluard, Aude Paillassa, Laurent Puech, Philippe Vinatier, Viviane Turq, et al.. Lithium conducting solid electrolyte Li1.3Al0.3Ti1.7(PO4)3 obtained via solution chemistry. Journal of the European Ceramic Society, 2013, 33 (6), pp.1145-1153. ⟨10.1016/j.jeurceramsoc.2012.08.005⟩. ⟨hal-00793078⟩