| 초록 |
Current lithium batteries contain flammable liquid solvent which poses a major risk as fire hazard and cause difficulties in waste disposal and management. Some of these problems can be solved using a solid polymer electrolyte(SPE). Nowadays, the use of ionic liquid electrolytes could improve the performance, security, speed, cyclability, and long term stability of lithium batteries. In this study, we synthesized poly(ethylene oxide)-lithium bis(trifluoromethane sulfonyl) imide(LITFSI) composite electrolyte containing a different of 1-ethyl-3-methylimidazolium tetrafluoroborate. The crystallinity and thermal stability of the composite polymer electrolytes (CPEs) were estimated using differential scanning calorimeter (DSC) or X-ray diffraction (XRD). The electrochemical properties of CPEs were measured by the AC impedance method and cyclic voltammetry (CV). The results provide upgrade of ionic conductivity at room temperature for PEO based polymer electrolytes. |
