Two‐dimensional, Knight‐shifted, T₂‐contrasted ²³Na magnetic resonance imaging (MRI) of an all‐solid‐state cell with a Na electrode and a ceramic electrolyte is employed to directly observe Na microstructural growth. A spalling dendritic morphology is observed and confirmed by more conventional post‐mortem analysis; X‐ray tomography and scanning electron microscopy. A significantly larger ²³Na T₂ for the dendritic growth, compared with the bulk metal electrode, is attributed to increased sodium ion mobility in the dendrite. ²³Na T₂‐contrast MRI of metallic sodium offers a clear, routine method for observing and isolating microstructural growths and can supplement the current suite of techniques utilised to analyse dendritic growth in all‐solid‐state cells.

中文翻译：

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使用 23Na T2 加权磁共振成像对全固态钠电池中钠枝晶的生长进行成像

采用具有 Na 电极和陶瓷电解质的全固态电池的二维、奈特位移、T ₂对比^{23 Na 磁共振成像 (MRI) 来直接观察 Na 微观结构的生长。}通过更传统的尸检分析观察并证实了剥落的树突形态；X 射线断层扫描和扫描电子显微镜。^{与块体金属电极相比，枝晶生长的23} Na T ₂明显更大，这归因于枝晶中钠离子迁移率的增加。^{金属钠的23} Na T ₂对比 MRI 提供了一种清晰、常规的观察和分离微观结构生长的方法，并且可以补充目前用于分析全固态细胞中树突状生长的技术套件。