| 초록 |
Recently, lithium-ion batteries are facing safety issues, prompted by highly flammable characteristics of liquid electrolytes and thermal/ mechanical instability of battery separator. In this study, we investigate highly conductive, mechanically robust, and flame-retardant solid-state hybrid electrolytes by combining succinonitrile (SN) electrolytes and surface modified silica nanoparticles. We designed silica nanoparticles to have inter-connected mesopores with nitrile groups on their surfaces. It has been revealed that nitrile groups interact effectively with lithium ions resulted on improved lithium dissociation and ionic conductivities. In particular, the confinement effects by surface functionalized pores of silica nanoparticles offered enhanced thermodynamic compatibility with SN, leading to non-freezing behavior at subzero temperatures and therefore, stable battery performance in a wide range of temperatures of interest. |
