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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.

権利情報:

• cc-by-3.0
  

キーワード: Magnesium Battery, Surface functionalization, Manganese oxide, Iron oxide, oxalate

刊行年月日: 2024-10-31

出版者: Royal Society of Chemistry (RSC)

掲載誌:

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

研究助成金:

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

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1039/d4lf00290c

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更新時刻: 2025-05-02 12:30:13 +0900

MDRでの公開時刻: 2025-05-02 12:17:38 +0900