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The 3D microstructure of electrodeposited Li is essential for advancing Li-metal batteries because of the heterogeneous Li electrodeposition behaviors and complex phases within the electrode. However, high-resolution 3D imaging of large-scale features is challenging when using existing 3D characterization technologies. We employ Xe plasma focused-ion-beam-scanning electron microscopy for the high-resolution, large-volume 3D reconstructions of electrodeposited Li (50 nm per pixel and 200 μm in dimension). This approach can visualize metallic Li, pores, and individual Li particles, enabling a comprehensive statistical analysis of their distribution, volume, number, and shape. We identify distinct Li growth mechanisms at low and high current densities, with Li growth being predominant at 0.2 mA cm−2, while both Li growth and new nucleation occur simultaneously at ≥0.5 mA cm−2. This study improves our understanding of Li microstructure-performance relationships and provides an innovative method for electrode evaluation and optimization.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Li metal, 3D microstructure

刊行年月日: 2025-02-10

出版者: Elsevier BV

掲載誌:

• Cell Reports Physical Science (ISSN: 26663864) 102439

研究助成金:

• Japan Science and Technology Agency JPMJPF2016

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1016/j.xcrp.2025.102439

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更新時刻: 2025-02-23 22:49:02 +0900

MDRでの公開時刻: 2025-02-23 22:49:02 +0900