The addition of Li2O-B2O3-Al2O3 (LBA) sintering aid to Li6.1Ga0.3La3Zr2O12 (LGLZO) solid electrolytes enhances grain boundary characteristics and reduces porosity. This modification leads to a substantial increase in ionic conductivity and mechanical stability, while effectively preventing Li dendrite formation. The optimized LGLZO sample with LBA exhibits improved long-term cycling performance, making it a promising candidate for high-performance all-solid-state batteries. These findings underscore the critical role of grain boundary engineering in enhancing the electrochemical properties of garnet-type electrolytes.
- Rae-Hyun Lee
- Chea-Yun Kang
- Seung-Hwan Lee