ID 10185
File
Authors
Domi, Yasuhiro Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University Researchers DB KAKEN
Usui, Hiroyuki Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University Researchers DB 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)
Sakaguchi, Hiroki Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University Researchers DB KAKEN
Keywords
Lithium-ion Battery
Negative Electrode
Composite
Ionic-liquid Electrolyte
Abstract
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.
Publisher
The Electrochemical Society of Japan
Content Type
Journal Article
Link
ISSN
13443542
EISSN
21862451
Journal Title
ELECTROCHEMISTRY
Volume
88
Issue
6
Start Page
548
End Page
554
Published Date
2020
Publisher-DOI
Text Version
Author
Rights
(C) The Author(s) 2020. Published by ECSJ.
Citation
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
Department
Faculty of Engineering/Graduate School of Engineering
Language
English
Web of Science Key ut
WOS:000587621000010