Recent advances of electrolytes for sodium-ion batteries

doi:10.3969/j.issn.2095-4239.2016.03.004

Abstract

Abstract:

As a novel generation of energy storage battery system, sodium-ion batteries have rapidly captured much attention due to its abundant resources, low cost, high energy density. Electrolyte plays an important role in making sodium-ion batteries with high energy density, long cycling life and high security. The research of organic electrolyte, aqueous electrolyte, ionic liquid electrolyte, polymer gel electrolyte, polymer solid electrolyte and inorganic solid composite electrolyte was reviewed and the ionic conductivity, electrochemical window and thermal stability of these electrolytes were discussed. So far, organic electrolyte is widely used in sodium-ion batteries, exhibiting good electrochemical performances, whose safety still needs improvement. For ionic liquid electrolyte, solid electrolyte and gel electrolyte with better safety, there are still many fundamental issues to be understood; and some problems, such as cost, ionic conductivity and mechanical strength, are to be optimized. Furthermore, prospective of the development of sodium-ion battery electrolyte is put forward.

Key words: sodium-ion battery, liquid electrolyte, ionic liquid, solid electrolyte, gel electrolyte

ZHU Na, WU Feng, WU Chuan, BAI Ying, LI Yitong. Recent advances of electrolytes for sodium-ion batteries[J]. Energy Storage Science and Technology, 2016, 5(3): 285-291.

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