Hiroaki Kobayashi
;
Yu Fukumi
;
Hiroto Watanabe
;
Reona Iimura
;
Naomi Nishimura
;
Toshihiko Mandai
(National Institute for Materials Science)
;
Yoichi Tominaga
;
Masanobu Nakayama
;
Tetsu Ichitsubo
;
Itaru Honma
;
Hiroaki Imai
Collection
Citation
Description:
(abstract)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.
Rights:
Keyword: magnesium battery, porous nanoparticles, cathode materials, cubic metastable spinel, freeze-drying
Date published: 2023-02-14
Publisher: American Chemical Society (ACS)
Journal:
- ACS Nano (ISSN: 1936086X) vol. 17 issue. 3 p. 3135-3142
Funding:
- Japan Society for the Promotion of Science JP20H02436
- Advanced Low Carbon Technology Research and Development Program JPMJAL1301
Manuscript type: Publisher's version (Version of record)
MDR DOI:
First published URL: https://doi.org/10.1021/acsnano.2c12392
Related item:
Other identifier(s):
Contact agent:
Updated at: 2024-10-10 16:30:34 +0900
Published on MDR: 2024-10-10 16:30:34 +0900
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