Spatiotemporal mapping of microscopic strains and defects to reveal Li-dendrite-induced failure in all-solid-state batteries. (July 2022)

• Record Type: Journal Article
• Authors: Shen, Hao; Chen, Kai; Kou, Jiawei; Jia, Zhanhui; Tamura, Nobumichi; Hua, Weibo; Tang, Wei; Ehrenberg, Helmut; Doeff, Marca
• Is Part Of: Materials today. Volume 57(2022)
• Page Start: 180
• Page End: 191
• Publication Date: 2022-07
• Subjects: All-solid-state Li battery -- In-situ spatiotemporal μLaue study -- Microscopic strain and defects -- Dendritic failure; Materials science -- Periodicals; Metallurgy -- Periodicals; Metal-work -- Periodicals; Biomedical and Dental Materials -- Periodicals; Manufactured Materials -- Periodicals; Metals -- Periodicals; 620.11
• DOI: 10.1016/j.mattod.2022.06.005
• Languages: English
• ISSNs: 1369-7021

Abstract

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