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Mn-based transition metal oxides nanoparticles are promising candidates as cathode active materials for rechargeable magnesium batteries, but their high catalytic activity for oxidative electrolyte decomposition and large surface area deteriorate their cycle performance. A recent study [Yagi et al. J. Mater. Chem. A, 2021, 9, 26401–26409] demonstrated that the catalytic activity was less prominent in Fe-based oxides than in other transition metal oxides, containing Mn. Fe-based oxides show low catalytic activity for oxidative electrolyte decomposition compared with Mn-based congeners. The strong capability of oxalate ions for bridging transition metal ions was utilised to form thin, uniform Fe2O3 layers on nanoparticles of MgMn2O4 and -MnO2. The resulting Fe2O3 layers effectively suppressed side reactions during insertion and extraction of the Mg2+ ions and improved the capacity retention and cycle performance.

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• cc-by-3.0
  

Keyword: Magnesium Battery, Surface functionalization, Manganese oxide, Iron oxide, oxalate

Date published: 2024-10-31

Publisher: Royal Society of Chemistry (RSC)

Journal:

• RSC Applied Interfaces (ISSN: 27553701) vol. 2 issue. 1 p. 179-184

Funding:

• Japan Science and Technology Agency The GteX Program Japan Grant/JPMJGX23S1

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

MDR DOI:

First published URL: https://doi.org/10.1039/d4lf00290c

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Updated at: 2025-05-02 12:30:13 +0900

Published on MDR: 2025-05-02 12:17:38 +0900