期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 22, 期 45, 页码 26452-26458出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cp04376a
关键词
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资金
- program Elements Strategy Initiative to Form Core Research Center'' of MEXT, Japan [JPMXP0112101003]
- program Elements Strategy Initiative for Catalysts & Batteries (ESICB)'' of MEXT, Japan [JPMXP0112101003]
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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