中国物理B ›› 2020, Vol. 29 ›› Issue (8): 87804-087804.doi: 10.1088/1674-1056/ab9c07

所属专题: SPECIAL TOPIC — Water at molecular level

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Effects of water on the structure and transport properties of room temperature ionic liquids and concentrated electrolyte solutions

Jinbing Zhang(张晋兵), Qiang Wang(王强), Zexian Cao(曹则贤)   

  1. 1 School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China;
    2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 Songshan Lake Materials Laboratory, Dongguan 523808, China
  • 收稿日期:2020-04-24 修回日期:2020-06-01 出版日期:2020-08-05 发布日期:2020-08-05
  • 通讯作者: Qiang Wang, Zexian Cao E-mail:qwang@iphy.ac.cn;zxcao@iphy.ac.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11974385 and 91956101), the Fund from the Chinese Academy of Sciences (Grant No. 1731300500030), and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB07030100).

Effects of water on the structure and transport properties of room temperature ionic liquids and concentrated electrolyte solutions

Jinbing Zhang(张晋兵)1,2, Qiang Wang(王强)2, Zexian Cao(曹则贤)2,3   

  1. 1 School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China;
    2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 Songshan Lake Materials Laboratory, Dongguan 523808, China
  • Received:2020-04-24 Revised:2020-06-01 Online:2020-08-05 Published:2020-08-05
  • Contact: Qiang Wang, Zexian Cao E-mail:qwang@iphy.ac.cn;zxcao@iphy.ac.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11974385 and 91956101), the Fund from the Chinese Academy of Sciences (Grant No. 1731300500030), and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB07030100).

摘要:

Transport properties and the associated structural heterogeneity of room temperature aqueous ionic liquids and especially of super-concentrated electrolyte aqueous solutions have received increasing attention, due to their potential application in ionic battery. This paper briefly reviews the results reported mainly since 2010 about the liquid-liquid separation, aggregation of polar and apolar domains in neat RTILs, and solvent clusters and 3D networks chiefly constructed by anions in super-concentrated electrolyte solutions. At the same time, the dominating effect of desolvation process of metal ions at electrode/electrolyte interface upon the transport of metal ions is stressed. This paper also presents the current understanding of how water affects the anion-cation interaction, structural heterogeneities, the structure of primary coordination sheath of metal ions and consequently their transport properties in free water-poor electrolytes.

关键词: super-concentrated electrolyte solutions, room temperature ionic liquids, water effect, structural heterogeneity, transport property

Abstract:

Transport properties and the associated structural heterogeneity of room temperature aqueous ionic liquids and especially of super-concentrated electrolyte aqueous solutions have received increasing attention, due to their potential application in ionic battery. This paper briefly reviews the results reported mainly since 2010 about the liquid-liquid separation, aggregation of polar and apolar domains in neat RTILs, and solvent clusters and 3D networks chiefly constructed by anions in super-concentrated electrolyte solutions. At the same time, the dominating effect of desolvation process of metal ions at electrode/electrolyte interface upon the transport of metal ions is stressed. This paper also presents the current understanding of how water affects the anion-cation interaction, structural heterogeneities, the structure of primary coordination sheath of metal ions and consequently their transport properties in free water-poor electrolytes.

Key words: super-concentrated electrolyte solutions, room temperature ionic liquids, water effect, structural heterogeneity, transport property

中图分类号:  (Solutions and ionic liquids)

  • 78.30.cd
66.10.-x (Diffusion and ionic conduction in liquids) 66.30.jj (Diffusion of water) 47.57.eb (Diffusion and aggregation)