Recent advances in the interfacial stability, design and in situ characterization of garnet-type Li7La3Zr2O12 solid-state electrolytes based lithium metal batteries

Solid-state electrolyte (SSE) coupled with Li metal anode, is one of the very promising architecture designs to achieve all-solid-state batteries (ASSBs) for advanced next-generation energy storage technology in expectation boosted density, power, and increased safety. Among reported SSEs, garnet-type Li7La3Zr2O12 (LLZO) SSEs have attracted wide interest terms their relatively high ionic conductivity good chemical stability against metal. However, there an increasing amount recent research pointing out interfacial (electro)chemical instabilities between LLZO electrodes (Li anode cathode), which hinder commercial-scale applications. In this review, we introduce challenges at both LLZO/Li LLZO/cathode interfaces revealed by works. We also review summarize diverse on mitigating such instabilities, situ characterization techniques understand these issues.