Conductivity, microstructure and mechanical properties of tape-cast LATP with LiF and SiO2 additives

Abstract LATP sheets with LiF and SiO 2 addition prepared by tape cast as electrolytes for solid-state batteries were characterized regarding conductivity, microstructure mechanical properties aiming toward an optimized composition. The use of additives permitted a reduction the sintering temperature. Rietveld analyses samples revealed phase mixture NaSICON modifications crystallizing rhombohedral orthorhombic symmetry superstructure space group Pbca. It seems that acts additive but also mineralizer LATP. As general trend, higher to ratios led lower porosities values elastic modulus hardness determined indentation testing, presence leads decrease in ionic conductivity. Micro-pillar testing was used assess crack growth behavior revealing weak grain boundaries.