Non-contact dielectric characterization of lithium ionic solid electrolyte polymer

The dielectric properties and ionic conductivity of novel polymer electrolytes for high capacity lithium battery are characterized by non-contact methods in two broad frequency ranges from 50 Hz to 20 KHz and 4 GHz to 40 GHz. The noncontact methods of measuring the dielectric properties exhibit advantages over traditional contact electrode methods. Two techniques and instruments employing air gap measurement by capacitance bridge and in-waveguide measurement by vector network analyzer are applied to measure the complex dielectric spectra. The complex dielectric spectra are then used to determine the complex alternating current electrical conductivity and thus the ionic conductivity.