ID 7244
File
Authors
Yamaguchi, Kazuki Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University
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
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
Nishida, Haruka Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University
Komura, Takuro Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University
Nokami, Toshiki Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University Researchers DB KAKEN
Itoh, Toshiyuki Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University / Center for Research on Green Sustainable Chemistry, Tottori University Researchers DB KAKEN
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
Tin phosphide
Na-ion battery
Ionic liquid electrolyte
Ether-substitution
Abstract
We have previously disclosed that the ionic-liquid electrolyte sodium bis(fluorosulfonyl)amide (NaFSA)/1-methyl-1-propylpyrrolidinium bis(fluorosulfonyl)amide (Py13-FSA) can significantly improve the cycling stability of Sn4P3 negative electrodes for Na-ion batteries (NIBs). However, the strong electrostatic interaction between Na+ and FSA− in the electrolyte leads to high viscosity and low conductivity. In this study, we have tried to improve the conductivity of the electrolyte and enhance the rate capability of the Sn4P3 electrode by introducing an ether group in the side-chain of the ionic liquid cation to reduce said electrostatic interaction. Ether-substituted ionic liquid 1-methoxymethyl-1-methylpyrrolidinium (PyMOM)-FSA showed higher conductivity than Py13-FSA and the Sn4P3 electrode exhibited a higher rate capability. The differential capacity vs. potential plots suggest that the reaction between Na+ and Sn or P is promoted in the ether-substituted ionic liquid electrolyte. These results demonstrate that introduction of an ether moiety is an effective approach to improve the rate capability of the Sn4P3 electrode in NIBs.
Publisher
Elsevier
Content Type
Journal Article
Link
ISSN
15726657
Journal Title
Journal of Electroanalytical Chemistry
Volume
845
Start Page
66
End Page
71
Published Date
2019-07-15
Publisher-DOI
Text Version
Author
Rights
(C) 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Citation
Yamaguchi, Kazuki. Usui, Hiroyuki. Domi, Yasuhiro. et al. Electrochemical performance of Sn4P3 negative electrode for Na-ion batteries in ether-substituted ionic liquid electrolyte. Journal of Electroanalytical Chemistry. 845. 66-71. 2019-07-15. doi:10.1016/j.jelechem.2019.05.047
Department
Faculty of Engineering/Graduate School of Engineering
Language
English
pii
S1572-6657(19)30403-5