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

The interfacial contact between a solid electrolyte and cathode materials is one of the challenges for solid-state battery (SSB) industry. cosintering could be possible solution. Considering future scope fabrication by process phosphate-based electrolytes cathodes (LiFePO4, Li3V2(PO4)3, etc.), present study focuses on stabilizing NASICON structured Li1.4Al0.4Ti1.6(PO4)3 (LATP) in an inert atmosphere as proposed are not stable air at high temperatures. results show influence particle size heating rate along with sintering temperature achieving pure phase fully dense pellets argon atmosphere. Cracks/voids, secondary phases, reduction Ti were observed prepared powder bigger under gas sintering. work only successfully solves these issues decreasing reducing but also produces highly more than 98% density 800 °C. We have achieved conductivity 8.77 × 10–4 S cm–1 room pellet sintered just °C argon, which 3–4 times higher samples Therefore, we succeeded obtaining first time conductivity, phase, LATP relatively low atmosphere, important solution process. Furthermore, stabilized shows superior electrochemical performance when tested Li metal symmetric cell.