フルテキストファイル
著者
Usui Hiroyuki Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University/Center for Research on Green Sustainable Chemistry, Tottori University 研究者総覧 KAKEN
Nouno Kazuma Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University/Center for Research on Green Sustainable Chemistry, Tottori University
Takemoto Yuya Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University/Center for Research on Green Sustainable Chemistry, Tottori University
Nakada Kengo Department of Applied Mathematics and Physics, Tottori University
Ishii Akira Department of Applied Mathematics and Physics, Tottori University 研究者総覧 KAKEN
Sakaguchi Hiroki Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University/Center for Research on Green Sustainable Chemistry, Tottori University 研究者総覧 KAKEN
キーワード
FeSi2/Si composite
Ferrosilicon
Li-ion battery anode
Mechanical grinding
Gas-deposition
抄録
We prepared composite electrodes of iron silicide/Si by using mechanical grinding for mixtures of ferrosilicon and Si followed by gas-deposition, and investigated their electrochemical properties as Li-ion battery anode. With increasing the mechanical grinding time, the phase transformation from FeSi to FeSi2 took place more significantly, and the composite electrode showed better cycle stabilities. There was no remarkable difference in mechanical properties and electronic conductivity between FeSi and FeSi2. On the other hand, the FeSi2 exhibited about three times larger capacities in comparison with the FeSi electrode. In addition, a result of our first principle calculation indicates that Li ion can diffuse more easily in FeSi2 lattice than in FeSi lattice. It is suggested that the better cyclability of the composite electrodes was attributed to the moderate reactivity of FeSi2 with Li and the smooth Li-ion diffusion in it.
出版者
Elsevier
資料タイプ
学術雑誌論文
外部リンク
ISSN
0378-7753
書誌ID
AA1153408X
掲載誌名
Journal of power sources
最新掲載誌名
Journal of power sources
268
開始ページ
848
終了ページ
852
発行日
2014-12-05
出版者DOI
著者版フラグ
著者版
著作権表記
Copyright © 2014 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
掲載情報
Journal of power sources. 2014, 268, 848-852
部局名
工学部・工学研究科
言語
英語