Structure Control for Preparing High-Ionic Conductive Hybrid Nanofiber

Silver iodide (AgI) shows extremely high ionic conductivity, especially in α-phase crystals produced only above 147 °C. To obtain high ionic conductivity of α-AgI crystals near room temperature, we prepared a hybrid nanofiber with nano-sized AgI particles. Initially, potassium iodide (KI) and polyamide 6 (PA6) complex nanofibers were prepared using an iodophor solution of PA6 and KI in formic acid by electrospinning, and immersed into an aqueous silver nitrate solution. Structure and properties of as-spun KI/PA6 complex nanofibers, and the resulting AgI/PA6 hybrid nanofibers, were characterized by scanning electron microscopy (SEM), wide-angle X-ray diffraction (WAXD), and electrical conductivity measurements. Spun complex nanofibers ranged from ∼30 to 300 nm in diameter.