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https://hdl.handle.net/20.500.14094/90005561
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2024-04-30
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90005561 (fulltext)
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メタデータID
90005561
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open access
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タイトル
Destabilized Passivation Layer on Magnesium-Based Intermetallics as Potential Anode Active Materials for Magnesium Ion Batteries
著者
Matsui, Masaki ; Kuwata, Hiroko ; Mori, Daisuke ; Imanishi, Nobuyuki ; Mizuhata, Minoru
著者ID
A1992
研究者ID
1000070639210
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=6ae7f375d4ce10ca520e17560c007669
著者名
Matsui, Masaki
松井, 雅樹
マツイ, マサキ
所属機関名
工学研究科
著者名
Kuwata, Hiroko
著者名
Mori, Daisuke
著者名
Imanishi, Nobuyuki
著者ID
A0922
研究者ID
1000010283871
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=bc56357c0d6f0f29520e17560c007669
著者名
Mizuhata, Minoru
水畑, 穣
ミズハタ, ミノル
所属機関名
工学研究科
収録物名
Frontiers in Chemistry
巻(号)
7
ページ
7-7
出版者
Frontiers Media
刊行日
2019-01-23
公開日
2019-02-05
抄録
Passivation of magnesium metal anode is one of the critical challenges for the development of magnesium batteries. Here we investigated the passivation process of an intermetallic anode: Mg3Bi2 synthesized by solid-state and thin film process. The Mg3Bi2 composite electrode shows excellent reversibility in magnesium bis(trifluoromethansulfonylamide) dissolved in acetonitrile, while Mg3Sb2, which has same crystal structure and similar chemical properties, is electrochemically inactive. We also fabricated the Mg3Bi2 thin film electrodes, which show reversibility with low overpotential not only in the acetonitrile solution but also glyme-based solutions. Surface layer corresponding to the decomposed TFSA anion is slightly suppressed in the case of the Mg3Bi2 thin film electrode, compared with Mg metal. Comparative study of hydrolysis process of the Mg3Bi2 and the Mg3Sb2 suggests that the both intermetallic anodes are not completely passivated. The bond valence sum mapping of the Mg3Bi2 indicates that the fast Mg2+ diffusion pathway between 2d tetrahedral sites is formed. The electrochemical properties of the Mg3Bi2 anode is mainly due to the less passivation surface with the fast Mg2+ diffusion pathways.
キーワード
intermetallics
anode
passivation layer
hydrolysis
bond-valence sum mapping
Mg2+ diffusion pathway
カテゴリ
工学研究科
学術雑誌論文
権利
© 2019 Matsui, Kuwata, Mori, Imanishi and Mizuhata.
This is an openaccess article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
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資源タイプ
journal article
言語
English (英語)
eISSN
2296-2646
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関連情報
DOI
https://doi.org/10.3389/fchem.2019.00007
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