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Electrochemical performance of Sn4P3 negative electrode for Na-ion batteries in ether-substituted ionic liquid electrolyte 60423240 薄井, 洋行 ウスイ, ヒロユキ Usui, Hiroyuki 50576717 道見, 康弘 ドウミ, ヤスヒロ Domi, Yasuhiro 60402963 野上, 敏材 ノカミ, トシキ Nokami, Toshiki 50193503 伊藤, 敏幸 イトウ, トシユキ Itoh, Toshiyuki 00202086 坂口, 裕樹 サカグチ, ヒロキ Sakaguchi, Hiroki Yamaguchi, Kazuki Nishida, Haruka Komura, Takuro (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/ Tin phosphide Na-ion battery Ionic liquid electrolyte Ether-substitution Tin phosphide Na-ion battery Ionic liquid electrolyte Ether-substitution 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. Elsevier 2019-07-15 eng journal article AM https://repository.lib.tottori-u.ac.jp/records/7258 10.1016/j.jelechem.2019.05.047 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:10.10 https://www.sciencedirect.com/science/article/pii/S1572665719304035 https://www.sciencedirect.com/science/article/pii/S1572665719304035 15726657 Journal of Electroanalytical Chemistry Journal of Electroanalytical Chemistry 845 66 71 https://repository.lib.tottori-u.ac.jp/record/7258/files/jec845_66.pdf application/pdf 722.5 kB 2023-03-17