| 초록 |
This safety concern becomes more serious in newly-emerging application fields such as electric vehicles and grid scale energy storage systems, which employ large-sized, high-capacity lithium-ion batteries. One promising solution to address the liquid electrolyte-induced safety issues is to replace with nonflammable, thermally-stable electrolytes. Here, we demonstrate a new electrolyte system composed of 1M LiTFSI in sebaconitrile. The SBN is featured with high boiling temperature (~ 375 oC) and nonflammability. Based on the characterization of thermal/electrochemical properties of SBN-based electrolytes, their application to lithium-ion batteries is explored as a function of operating temperature. This advantageous effect of SBN-based electrolytes on thermal stability of cell, in comparison to conventional carbonate-based liquid electrolytes, is discussed by scrutinizing the variation in AC impedance of cells and ionic conductivity of the electrolytes as a function of temperature. |
