Li-Stuffed Garnet Electrolytes for Solid-State Lithium Metal Batteries

Solid-state lithium metal batteries present a central materials challenge for next-generation energy storage, requiring control of ionic transport, mechanical integrity, and interfacial stability. Among solid electrolytes, Li-stuffed garnet oxides are attractive due to their high Li-ion conductivity, chemical stability against lithium metal, and wide electrochemical stability window compatible with high-voltage cathodes. However, practical implementation remains limited by processing and interfacial issues, including densification of large-area electrolytes, lithium dendrite penetration, and high-resistance solid-solid contacts.

In this talk, I will present our recent materials-focused studies on Li-stuffed garnet electrolytes, highlighting sintering and microstructural control and interfacial engineering strategies. By linking processing, microstructure, and interfacial behavior, we aim to clarify the key materials factors governing stability and failure in garnet-based systems. Finally, I will discuss remaining challenges and future directions toward the practical realization of solid-state lithium metal batteries.