Research progress in garnet type solid electrolytes of Li7La3Zr2O12
The garnet-type solid electrolyte Li7La3Zr2O12(LLZO)exhibits high ionic conductivity,a broad electrochemical window,excellent thermal stability,and robust chemical stability.These characteristics render it pivotal in the development and commercialization of high-safety and high-energy-density solid-state lithium batteries.However,compared with traditional liquid electrolytes,the ionic conductivity of LLZO is several orders of magnitude lower,and the interfacial resistance arising from solid-solid contacts between LLZO electrolyte layers and electrodes poses a significant challenge.In recent years,extensive scientific research on LLZO has been conducted,yielding substantial progress,which necessitates a comprehensive review.This article summarizes the structural features and conduction mechanisms of LLZO,along with its synthesis methods,modification strategies,and practical approaches.Additionally,it provides an outlook on future directions to underpin the practical applications of LLZO with a scientific foundation.
lithium metal batteriessolid electrolyteLi7La3Zr2O12ionic conductivity
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