Research data supporting the publication "Evaluation of Ga0.2Li6.4Nd3Zr2O12 garnets: exploiting dopant instability to create a mixed conductive interface to reduce interfacial resistance for all solid state batteries"

Most studies have focused on La based systems, with very little work on other lanthanides. Here we report a study of the Nd based garnet Ga0.2Li6.4Nd3Zr2O12, illustrating substantial differences in the interfacial behaviour. This garnet shows very low interfacial resistance attributed to dopant exsolution which, when combined with moderate heating (175°C, 1h) with Li metal, we suggest forms Ga-Li eutectics which significantly reduces the resistance at the Li/Garnet interface to as low as 67 Ω cm2 (much lower than equivalent La based systems).

The material also shows intrinsically high density (93%) and good conductivity (≥ 0.2 mS cm-1) via conventional furnaces in air. It is suggested these garnets are particularly well suited to provide a mixed conductive interface (in combination with other garnets) which could enable future solid-state batteries.