File
Authors
Domi, Yasuhiro Department of Chemistry and Biotechnology, Graduate School of Enginnering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University / Global Research Center for Environment and Energy based on Nanomaterials Science, National Institute for Materials Science Researchers DB KAKEN
Usui, Hiroyuki Department of Chemistry and Biotechnology, Graduate School of Enginnering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University / Global Research Center for Environment and Energy based on Nanomaterials Science, National Institute for Materials Science Researchers DB KAKEN
Takaishi, Rena Graduate School of Sustainability Science, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University / Global Research Center for Environment and Energy based on Nanomaterials Science, National Institute for Materials Science
Sakaguchi, Hiroki Department of Chemistry and Biotechnology, Graduate School of Enginnering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University / Global Research Center for Environment and Energy based on Nanomaterials Science, National Institute for Materials Science Researchers DB KAKEN
Keywords
lithium-ion batteries
silicide
ionic liquid electrolyte
gas deposition
soft X-ray emission spectroscopy
Abstract
We investigated the lithiation and delithiation properties of pure binary silicide electrodes in an ionic liquid electrolyte as novel anodes for lithium‐ion batteries. Some electrodes maintain a high reversible capacity in the electrolyte, whereas they show a poor cycling performance in an organic electrolyte. The superior performance results from the high affinity for the transition metal that composes the silicide with Li. Based on reaction behavior analysis, the crystal structure of silicide is maintained during the cycling, and phase separation does not occur. The ionic liquid electrolyte suppresses the formation of cracks and exfoliation of the silicide layer from a substrate. In addition, a surface film formed on the silicide electrode through the reductive decomposition of the electrolyte has different components than that on a Si electrode, even in the same ionic liquid electrolyte. Soft X‐ray emission spectroscopy demonstrates that the pure silicide itself reacts with Li. The obtained results will provide significant insights into novel alloy‐based anode materials for lithium‐ion batteries.
Publisher
Wiley-VCH Verlag GmbH & Co. KGaA.
Content Type
Journal Article
Link
ISSN・ISBN
21960216
Journal Title
ChemElectroChem
Volume
6
Issue
2
Start Page
581
End Page
589
Published Date
2018-10-12
Publisher-DOI
Text Version
Publisher
Rights
© 2018 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited(CC BY. http://creativecommons.org/licenses/by/4.0/).
Citation
This research was published by Wiley: DOMI, Yasuhiro, et al. Lithiation and Delithiation Reactions of Binary Silicide Electrodes in an Ionic Liquid Electrolyte as Novel Anodes for Lithium‐Ion Batteries. ChemElectroChem, 2019, 6.2: 581-589. https://doi.org/10.1002/celc.201801088
Department
Faculty of Engineering/Graduate School of Engineering
Language
English