| 초록 |
In order to overcome safety issues, Solid Polymer Electrolytes (SPEs) having mechanically rigid and nonvolatile characteristics are widely considered as promising substitutes for ethylene or propylene carbonate-based organic liquid electrolytes. However, SPEs have a disadvantage of low ionic conductivity lower than 10-4 S/cm, which is not enough for the practical requirement for a lithium-ion batteries (LIBs). In this study, we synthesized polyacrylonitrile (PAN) with a hierarchical and bicontinuous structure with a high surface area, thereby producing continuous channels for mobile ions using thermally induced phase separation (TIPS) method. After combining the PAN with a mixture of a plastic crystal succinonitrile (SN) and a weaking-binding lithium salt (LiTFSI), it is successful to prepare PAN-based SPEs. Then, we systematically study the effect of SN/LiTFSI content on ionic conductivity and morphology using impedance spectroscopy and Fe-SEM, respectively. |
