Impedance Analysis for the designed composite layers with polymer and Inorganic electrolytes leading to high conductivity

Abstract: Solid Li-ion conductive composite layers based on polymer electrolyte and Li-ion-conducting particles are newly designed and fabricated. The composite layers are studied by AC impedance spectroscopy. The conductivity of the composite layers is enhanced to 0.14 mS/cm. The Li-ion transfer mechanism is discussed by a characteristic frequency of impedance analysis and shown that the inner way of Li-ion-conducting particles is major Li-ion path. The activation energy is smaller and larger than those for polymer electrolyte and the grain boundary of Li-ion-conducting particles, respectively. Application by using the new designed composite layers for the solid-state Li-ion batteries and solid-state Li-air batteries should be taken into consideration.