Comparative study of Ta and Ga doping effects on Li₇La₃Zr₂O₁₂ garnet electrolytes for advanced thermal battery applications.

ABSTRACT: The paradigm shift from conventional molten-salt electrolytes to solid-state garnet-type Li₇La₃Zr₂O₁₂ (LLZO) electrolytes in thermal batteries represents a critical advancement in high-temperature energy-storage systems. This study evaluated Ta- and Ga-doped LLZO electrolytes for FeS₂/Li-Si thermal batteries, focusing on their structural stability and electrochemical performance at 500 °C. While Ga-doped LLZO exhibited superior ionic conductivity at 25 °C, Ta-doped LLZO demonstrated exceptional high-temperature stability. Ta-doped LLZO cells achieved longer discharge durations and higher energy densities than Ga-doped LLZO cells, which is attributed to the retained cubic phase and minimised interfacial degradation. Conversely, Ga-doped

SUBMITTER: Kang H 

PROVIDER: S-EPMC12315797 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature