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Description:

The degradation of lithium-ion batteries has become a concerning issue. One problem is metal ion dissolution from the cathode material, such as Mn2+ dissolution from spinel-type LiMn2O4 (LMO). However, direct observation of the dissolution process has yet to be reported. Here, we establish in-situ 1H nuclear magnetic resonance imaging (MRI) measurement as an efficient technique to observe Mn2+ dissolution from a model lithium battery with LMO as the cathode. We observe an increase in the MRI signal intensity near the cathode, confirming the dissolution of Mn2+ from the cathode to the electrolyte. Moreover, we show that Mn2+ dissolution from LMO can be suppressed using an appropriate choice of electrolytes. We believe the method developed here can answer the long-time unanswered question of when, where, and how the metal ion dissolution occurs in the lithium-ion battery electrode and can be extended to other electrochemical systems.

Rights:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: Nuclear magnetic resonance imaging, Lithium-ion batteries, LiMn2O4

Date published: 2025-02-13

Publisher: Springer Science and Business Media LLC

Journal:

• Communications Materials (ISSN: 26624443) vol. 6 issue. 1 23

Funding:

• New Energy and Industrial Technology Development Organization P09012

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1038/s43246-025-00733-2

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Updated at: 2025-02-26 08:30:42 +0900

Published on MDR: 2025-02-26 08:30:42 +0900