锂离子电池低温电解液的研究进展

Research progress of low temperature electrolytes for Li-ion batteries

分析了从溶剂、锂盐和添加剂3个方面对电解液低温性能进行改进技术的研究现状。首先比较了乙烯碳酸酯(EC)基和丙烯碳酸酯(PC)基溶剂的低温性能,并针对这两类有机电解液的电化学和低温特性的改进,详细论述了几种重要的方法和措施,得出有机溶剂优化和添加剂的使用是提高电解液低温性能的有效手段的重要结论。最后指出了锂离子电池电解液低温性能的研究方向和应用前景。

Research progress of low temperature electrolytes in Li-ion batteries, such as conducting lithium salt, organic solvent and additives is reviewed and analyzed. The electrochemical properties and low temperature performance of ethylene carbonate （EC） and propylene carbonate （PC） based organic solvent are presented and compared. In order to modify the electrochemical and low temperature properties of the two important organic solvents above, a few important methods are introduced. It can be concluded that the optimization of organic solvent and use of additives are effective means to improve the low temperature performance of organic liquid electrolyte. The development and application trend of low temperature electrolytes for Li-ion batteries are also discussed.