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説明:

we fabricate an ultraporous (>500 m2 g−1) and ultrasmall (<2.5 nm) cubic spinel MgMn2O4 (MMO) by a freeze-dry assisted room-temperature alcohol reduction process. While the as fabricated MMO exhibits a discharge capacity of 160 mAh g−1, the removal of its surface hydroxy groups by heat-treatment activates it without structural change, improving its discharge capacity to 270 mAh g−1, the theoretical capacity at room temperature. These results are made possible by the ultraporous, ultrasmall particles that stabilize the metastable cubic spinel phase, promoting both the Mg2+ insertion/deintercalation in the MMO and the reversible transformation between the cubic spinel and cubic rock-salt phases.

権利情報:

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

キーワード: magnesium battery, porous nanoparticles, cathode materials, cubic metastable spinel, freeze-drying

刊行年月日: 2023-02-14

出版者: American Chemical Society (ACS)

掲載誌:

• ACS Nano (ISSN: 1936086X) vol. 17 issue. 3 p. 3135-3142

研究助成金:

• Japan Society for the Promotion of Science JP20H02436
• Advanced Low Carbon Technology Research and Development Program JPMJAL1301

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1021/acsnano.2c12392

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更新時刻: 2024-10-10 16:30:34 +0900

MDRでの公開時刻: 2024-10-10 16:30:34 +0900