Electrochemical Lithiation and Delithiation Properties of FeSi2/Si Composite Electrodes in Ionic-Liquid Electrolytes

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著者	道見康弘 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 薄井洋行 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 Shindo, Yoshiko Course of Chemistry and Biotechnology, Department of Engineering, Graduate School of Sustainability Science, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University Yodoya, Shuhei Course of Chemistry and Biotechnology, Department of Engineering, Graduate School of Sustainability Science, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University Sato, Hironori Course of Chemistry and Biotechnology, Department of Engineering, Graduate School of Sustainability Science, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University Nishikawa, Kei Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science (NIMS) 坂口裕樹 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	Lithium-ion Battery Negative Electrode Composite Ionic-liquid Electrolyte
抄録	We investigated the applicability of ionic-liquid electrolytes to FeSi2/Si composite electrode for lithium-ion batteries. In conventional organic-liquid electrolytes, a discharge capacity of the electrode rapidly faded. In contrast, the electrode exhibited a superior cycle life with a reversible capacity of 1000 mA h g(Si)−1 over 850 cycles in a certain ionic-liquid electrolyte. The difference in the cycle life was explained by surface film properties. In addition, the rate performance of the FeSi2/Si electrode improved in another ionic-liquid electrolyte. Remarkably, lithiation of only Si in FeSi2/Si composite electrode occurred whereas each FeSi2- and Si-alone electrode alloyed with Li in the ionic-liquid electrolyte. FeSi2 certainly covered the shortcomings of Si and the FeSi2/Si composite electrode exhibited improved cycle life and rate capability compared to Si-alone electrode.
出版者	The Electrochemical Society of Japan
資料タイプ	学術雑誌論文
外部リンク	https://doi.org/10.5796/electrochemistry.20-00091
ISSN	13443542
EISSN	21862451
掲載誌名	ELECTROCHEMISTRY
巻	88
号	6
開始ページ	548
終了ページ	554
発行日	2020
出版者DOI	10.5796/electrochemistry.20-00091
著者版フラグ	著者版
著作権表記	(C) The Author(s) 2020. Published by ECSJ.
掲載情報	Domi Yasuhiro, Usui Hiroyuki, Shindo Yoshiko, et al. Electrochemical Lithiation and Delithiation Properties of FeSi2/Si Composite Electrodes in Ionic-Liquid Electrolytes. ELECTROCHEMISTRY. 2020. 88(6). 548-554. doi:10.5796/electrochemistry.20-00091
部局名	工学部・工学研究科
言語	英語
Web of Science Key ut	WOS:000587621000010