4.8 Article

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

期刊

MATERIALS TODAY
卷 57, 期 -, 页码 180-191

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.mattod.2022.06.005

关键词

All-solid-state Li battery; In-situ spatiotemporal lLaue study; Microscopic strain and defects; Dendritic failure

资金

  1. National Key R&D Program of China [2021YFB2400400]
  2. National Science and Technology Major Project [2019 -VII -0019-0161]
  3. Assistant Secretary for Energy, Efficiency and Renewable Energy, Office of Vehicle Tech- nologies of the U.S. Department of Energy [51927801]
  4. National Natural Science Foundation of China [51927801, 21905220, 22108218, U20322205]
  5. 111 Project 2.0 [BP0618008]
  6. Office of Science, Office of Basic Energy Sciences, Materials Science Division, of the U.S. Department of Energy
  7. United States Government
  8. University of California

向作者/读者索取更多资源

Solid-state electrolytes (SSEs) are essential for successful and reliable all-solid-state lithium batteries, with potential improvements in safety and energy density compared to current lithium-ion batteries. However, implementing SSEs faces several challenges, including interfacial instability caused by the interaction of dendritic lithium during cycling. This study emphasizes the importance of studying the spatial distribution and temporal evolution of strains and defects in crystalline SSEs at the micro-scale, and how they affect dendrite growth.
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.

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