Spatiotemporal mapping of microscopic strains and defects to reveal Li-dendrite-induced failure in all-solid-state batteries

Solid-state electrolytes (SSEs) are key to the success and reliability of all-solid-state lithium batteries, potentially enabling improvements in terms safety energy density over state-of-the-art lithium-ion batteries. However, there several critical challenges their implementation, including interfacial instability stemming from dynamic interaction as-formed dendritic during cycling. For this work, we emphasize importance studying spatial distribution temporal evolution strains defects crystalline solid-state at micro-scale, how affects dendrite growth. A proof-of-principle study is demonstrated using synchrotron radiation based micro Laue X-ray diffraction method, a custom-developed in-situ cycling device. Defects residual mapped, intragranular misorientation observed. The feasibility technique discussed, recommendations for micro-strain engineering address Li/SSEs issues given. Also, work directions pointed out with consideration combining multi-techniques “poly-therapy”.