Tomoya Kawaguchi
;
Hikari Sakurai
;
Shusuke Fukui
;
Xiatong Ye
;
Hongyi Li
;
Toshihiko Mandai
;
Norihiko L. Okamoto
;
Tetsu Ichitsubo
説明:
(abstract)Rechargeable magnesium batteries (RMBs) have faced challenges in utilizing oxide cathodes due to the inherently sluggish Mg diffusion and poor compatibility with electrolytes, despite the high redox potential. Herein, we present a prototype RMB that is operational at room temperature, consisting of a nanoparticulate amorphous oxide cathode, fluorinated alkoxyborate (Mg[B(HFIP)4]2) as the electrolyte, and a Mg metal anode. The amorphous MgxTi1/9Mo2/9O cathode contains a considerable free volume formed by ion exchange between monovalent and divalent cations, facilitating Mg diffusion and eventually realizing reversible Mg insertion/extraction at room temperature. The reasonable compatibility of the present cathode with the electrolyte enables full cell operation with a Mg metal anode, and various analyses have demonstrated that Mg intercalation is responsible for the battery performance. The discharging capacity is ~150 mAh g−1, and 70 mAh g−1 is maintained after 200 cycles. These findings demonstrate the feasibility of RMBs with oxide cathodes that are operational at room temperature.
権利情報:
キーワード: Amorphous oxide cathode, Rechargeable magnesium battery, free volume
刊行年月日: 2025-09-17
出版者: Springer Science and Business Media LLC
掲載誌:
研究助成金:
原稿種別: 出版者版 (Version of record)
MDR DOI:
公開URL: https://doi.org/10.1038/s43246-025-00921-0
関連資料:
その他の識別子:
連絡先:
更新時刻: 2025-10-21 16:06:37 +0900
MDRでの公開時刻: 2025-10-21 15:43:40 +0900
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89_Kawaguchi_Commun Mater 2025_Amorphous oxide for rt RMBs.pdf
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サイズ | 4.07MB | 詳細 |