Local structure of a highly concentrated NaClO4aqueous solution-type electrolyte for sodium ion batteries

Ryo Sakamoto; Maho Yamashita; Kosuke Nakamoto; Yongquan Zhou; Nobuko Yoshimoto; Kenta Fujii; Toshio Yamaguchi; Ayuko Kitajou; Shigeto Okada

doi:10.1039/d0cp04376a

Local structure of a highly concentrated NaClO₄aqueous solution-type electrolyte for sodium ion batteries

Ryo Sakamoto, Maho Yamashita, Kosuke Nakamoto, Yongquan Zhou, Nobuko Yoshimoto, Kenta Fujii, Toshio Yamaguchi, Ayuko Kitajou, Shigeto Okada

Department of Advanced Device Materials

Research output: Contribution to journal › Article › peer-review

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Abstract

Aqueous Na-ion batteries with highly concentrated NaClO4 aq. electrolytes are drawing attention as candidates for large-scale rechargeable batteries with a high safety level. However, the detailed mechanism by which the potential window in 17 m NaClO4 aq. electrolyte was expanded remains unclear. Therefore, we investigated the local structure around a Na+ ion or a ClO4- ion using X-ray diffraction combined with empirical potential structure refinement (EPSR) modelling and Raman spectroscopy. The results showed that in 17 m NaClO4 aq. electrolyte, most of the water molecules were coordinated to Na+ ions and few free water molecules were present. The 17 m NaClO4 aq. electrolyte could be interpreted as widening the potential window because almost all water molecules participated in hydration of the Na+ ions.

Original language	English
Pages (from-to)	26452-26458
Number of pages	7
Journal	Physical Chemistry Chemical Physics
Volume	22
Issue number	45
DOIs	https://doi.org/10.1039/d0cp04376a
Publication status	Published - Dec 7 2020

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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Local structure of a highly concentrated NaClO₄aqueous solution-type electrolyte for sodium ion batteries. / Sakamoto, Ryo; Yamashita, Maho; Nakamoto, Kosuke; Zhou, Yongquan; Yoshimoto, Nobuko; Fujii, Kenta; Yamaguchi, Toshio; Kitajou, Ayuko; Okada, Shigeto.

In: Physical Chemistry Chemical Physics, Vol. 22, No. 45, 07.12.2020, p. 26452-26458.

Research output: Contribution to journal › Article › peer-review

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title = "Local structure of a highly concentrated NaClO4aqueous solution-type electrolyte for sodium ion batteries",

abstract = "Aqueous Na-ion batteries with highly concentrated NaClO4 aq. electrolytes are drawing attention as candidates for large-scale rechargeable batteries with a high safety level. However, the detailed mechanism by which the potential window in 17 m NaClO4 aq. electrolyte was expanded remains unclear. Therefore, we investigated the local structure around a Na+ ion or a ClO4- ion using X-ray diffraction combined with empirical potential structure refinement (EPSR) modelling and Raman spectroscopy. The results showed that in 17 m NaClO4 aq. electrolyte, most of the water molecules were coordinated to Na+ ions and few free water molecules were present. The 17 m NaClO4 aq. electrolyte could be interpreted as widening the potential window because almost all water molecules participated in hydration of the Na+ ions.",

author = "Ryo Sakamoto and Maho Yamashita and Kosuke Nakamoto and Yongquan Zhou and Nobuko Yoshimoto and Kenta Fujii and Toshio Yamaguchi and Ayuko Kitajou and Shigeto Okada",

note = "Funding Information: This work received financial support from the programs {\textquoteleft}{\textquoteleft}Elements Strategy Initiative to Form Core Research Center{\textquoteright}{\textquoteright} and {\textquoteleft}{\textquoteleft}Elements Strategy Initiative for Catalysts & Batteries (ESICB){\textquoteright}{\textquoteright} of MEXT, Japan (grant JPMXP0112101003). Publisher Copyright: {\textcopyright} the Owner Societies.",

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doi = "10.1039/d0cp04376a",

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T1 - Local structure of a highly concentrated NaClO4aqueous solution-type electrolyte for sodium ion batteries

AU - Sakamoto, Ryo

AU - Yamashita, Maho

AU - Nakamoto, Kosuke

AU - Zhou, Yongquan

AU - Yoshimoto, Nobuko

AU - Fujii, Kenta

AU - Yamaguchi, Toshio

AU - Kitajou, Ayuko

AU - Okada, Shigeto

N1 - Funding Information: This work received financial support from the programs ‘‘Elements Strategy Initiative to Form Core Research Center’’ and ‘‘Elements Strategy Initiative for Catalysts & Batteries (ESICB)’’ of MEXT, Japan (grant JPMXP0112101003). Publisher Copyright: © the Owner Societies.

PY - 2020/12/7

Y1 - 2020/12/7

N2 - Aqueous Na-ion batteries with highly concentrated NaClO4 aq. electrolytes are drawing attention as candidates for large-scale rechargeable batteries with a high safety level. However, the detailed mechanism by which the potential window in 17 m NaClO4 aq. electrolyte was expanded remains unclear. Therefore, we investigated the local structure around a Na+ ion or a ClO4- ion using X-ray diffraction combined with empirical potential structure refinement (EPSR) modelling and Raman spectroscopy. The results showed that in 17 m NaClO4 aq. electrolyte, most of the water molecules were coordinated to Na+ ions and few free water molecules were present. The 17 m NaClO4 aq. electrolyte could be interpreted as widening the potential window because almost all water molecules participated in hydration of the Na+ ions.

AB - Aqueous Na-ion batteries with highly concentrated NaClO4 aq. electrolytes are drawing attention as candidates for large-scale rechargeable batteries with a high safety level. However, the detailed mechanism by which the potential window in 17 m NaClO4 aq. electrolyte was expanded remains unclear. Therefore, we investigated the local structure around a Na+ ion or a ClO4- ion using X-ray diffraction combined with empirical potential structure refinement (EPSR) modelling and Raman spectroscopy. The results showed that in 17 m NaClO4 aq. electrolyte, most of the water molecules were coordinated to Na+ ions and few free water molecules were present. The 17 m NaClO4 aq. electrolyte could be interpreted as widening the potential window because almost all water molecules participated in hydration of the Na+ ions.

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Local structure of a highly concentrated NaClO₄aqueous solution-type electrolyte for sodium ion batteries

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