Stabilizing the NASICON Solid Electrolyte in an Inert Atmosphere as a Function of Physical Properties and Sintering Conditions for Solid-State Battery Fabrication

Hari Raj (1) , Timothée Fabre (2) , Marie Lachal (2) , Audric Neveu (1) , Justine Jean (1) , Marlu César Steil (2) , Renaud Bouchet (2) , Valérie Pralong (1, 3)

1 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
2 MIEL - Matériaux Interfaces ELectrochimie
3 RS2E - Réseau sur le stockage électrochimique de l'énergie

The interfacial contact between solid electrolyte and cathode materials is one of the challenges for solid state battery (SSB) industry. The co-sintering of solid electrolyte and cathode materials could be a possible solution. Considering the future scope of solid state battery fabrication by cosintering process of phosphate based solid electrolyte and phosphate based cathodes (LiFePO4, Li3V2(PO4)3 etc.), present study focuses on stabilizing the NASICON structured Li1.4Al0.4Ti1.6(PO4)3 (LATP) solid electrolyte in inert atmosphere because proposed cathode materials are not stable in air at high temperature. The results show high influence of particle size and heating rate along with sintering temperature on achieving pure phase and fully dense pellets in argon atmosphere. The cracks/voids, secondary phases and reduction of Ti were observed in the

Mots clés: Atmospheric chemistry; Electrical conductivity; Grain; Particle size; Sintering

Domaines: Chimie; Science des matériaux [cond-mat.mtrl-sci]

Hari Raj, Timothée Fabre, Marie Lachal, Audric Neveu, Justine Jean, et al.. Stabilizing the NASICON Solid Electrolyte in an Inert Atmosphere as a Function of Physical Properties and Sintering Conditions for Solid-State Battery Fabrication. ACS Applied Energy Materials, 2023, 6 (3), pp.1197-1207. ⟨10.1021/acsaem.2c02464⟩. ⟨hal-04039580⟩