| 초록 |
Thermoplastic polyurethane-based gel polymer electrolytes (GPEs) was prepared to address the challenge of safety issues in energy storage devices. Electrically conductive and high stretchable TPU-based GPEs with silica nanoparticles as a fillers was prepared via one-pot synthesize of the sol-gel process. Interaction between 1-butyl-3-methylimidazolium bis(trifluorosulfonyl)imide ionic liquid and soft segments of TPU allows for the enhancement of ionic conductivity and tensile strain. Silica nanoparticles were added via in-situ sol-gel reaction resulting in the enhancement of mechanical properties. Morphologies, electrochemical properties, and mechanical properties were systematically investigated using scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR), electrochemical impedance spectroscopy, dynamic mechanical analyzer (DMA), and rheometer. Remarkably, TPU-based GPE with 1 wt% of silica particles shows high ionic conductivity at room temperature (~10-3 S/cm). Moreover, TPU-based GPE shows high specific capacitance that considers as prospective candidate for flexible electronics applications. |
