Unveiling the Liquid Electrolyte Solvation Structure by Small Angle X-ray Scattering
Unveiling the Liquid Electrolyte Solvation Structure by Small Angle X-ray Scattering
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DOI：
10.1021/acs.chemmater.3c01648
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发表时间：
2023-12
影响因子：
8.6
通讯作者：
Xinyi Liu;Lingzhe Fang;Xingyi Lyu;R. Winans;Tao Li
中科院分区：
文献类型：
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作者：
Xinyi Liu;Lingzhe Fang;Xingyi Lyu;R. Winans;Tao Li
对液体电解质（LE）溶剂化结构和电极-电解质界面行为的根本性认识，将给整个电化学储能领域带来更深入的思考和革命性的变化。无论各种可用的技术，用于研究电解质溶剂化结构在一个长的范围内的方法是非常有限的。小角X射线散射（SAXS）是拉曼光谱、傅里叶变换红外光谱或核磁共振的理想补充，它提供了从更大尺度观察电解质中团簇或网络的独特视角。了解从几埃到几百纳米的溶剂化结构无疑将为研究LE的宏观输运性质（如粘度和离子电导率）奠定良好的基础。本文主要讨论了小角X射线散射技术在不同电解质体系中的应用，展望了小角X射线散射技术在电解质研究中的应用前景，以及小角X射线散射技术在电解质研究中需要解决的问题。
The fundamental understanding of the liquid electrolyte (LE) solvation structure and electrode–electrolyte interface behavior will bring more in-depth thinking and revolutionary changes to the entire electrochemical energy storage field. Regardless of the variety of techniques available, the methods employed to investigate electrolyte solvation structures over a long-range are severely limited. Small-angle X-ray scattering (SAXS) is an ideal complement to Raman spectroscopy, Fourier transform infrared spectroscopy, or nuclear magnetic resonance, which offers a unique perspective from a larger scale on clusters or networks in electrolytes. Understanding the solvation structures from a few angstroms to hundreds of nanometers will undoubtedly lay a good foundation for studying the macroscopic transport properties, such as viscosity and ionic conductivity, of the LEs. In this Perspective, we discuss the use of SAXS to investigate the solvation structures in different electrolyte systems, a prospect for the SAXS broader application in the electrolyte study, and some challenges that need to be solved in the SAXS application.