Imaging Sodium Dendrite Growth in All‐Solid‐State Sodium Batteries Using  23 Na  T  2 ‐Weighted Magnetic Resonance Imaging | Zendy

Rees Gregory J. | Zendy; Spencer Jolly Dominic | Zendy; Ning Ziyang | Zendy; Marrow T. James | Zendy; Pavlovskaya Galina E. | Zendy; Bruce Peter G. | Zendy

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Imaging Sodium Dendrite Growth in All‐Solid‐State Sodium Batteries Using 23 Na T 2 ‐Weighted Magnetic Resonance Imaging

Author(s) -

Rees Gregory J.,

Spencer Jolly Dominic,

Ning Ziyang,

Marrow T. James,

Pavlovskaya Galina E.,

Bruce Peter G.

Publication year - 2021

Publication title -

angewandte chemie

Language(s) - English

Resource type - Journals

eISSN - 1521-3757

pISSN - 0044-8249

DOI - 10.1002/ange.202013066

Subject(s) - dendrite (mathematics) , sodium , magnetic resonance imaging , electrolyte , electrode , materials science , nuclear magnetic resonance , chemistry , analytical chemistry (journal) , metallurgy , medicine , geometry , mathematics , physics , chromatography , radiology

Two‐dimensional, Knight‐shifted, T 2 ‐contrasted 23 Na 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 23 Na T 2 for the dendritic growth, compared with the bulk metal electrode, is attributed to increased sodium ion mobility in the dendrite. 23 Na T 2 ‐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.

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