Alireza Kondori group published a paper in science and introduced a method to make LGPS/PEO composite polymer electrolyte (CPE).
Synthesis procedure
Ion conductivity
The ionic conductivity of the CPE was measured at room temperature by electrochemical impedance spectroscopy (EIS, AC impedance spectrum), using symmetric SS|CPE|SS electrochemical cell; a frequency range of 100 kHz to 0.1 Hz, and an AC signal of 5 mV was used; tool is a BioLogic potentiostat SP150.
The Nyquist diagram of the CPE is shown below with equilibrium circuit shown in the inset, whereย
- ๐ ๐ ย is the bulk resistance of the CPE
- ๐ ๐ย is the interfacial resistance that is present at the SS electrode and the CPE,ย
- ๐๐ย is the constant direction element
- ๐๐ย is the corresponding Warburg diffusion resistance at the low frequency region.
Based on Rs, ion conductivity is calculated to 0.52mS/cm, by the following equation:
Whereย ๐ฟ (๐๐)ย andย ๐ด (๐๐2)ย are the thickness and the surface area of the CPE in contact with the SS electrodes, respectively. ๐ ๐ ย (ฮฉ)ย is the bulk resistance.
Transference number
Transference number can be measured to be 0.73.
Electrochemical redox stability
Electrochemical redox stability of the CPE was determined by a linear
sweep voltammetry (LSV) experiment. The CPE exhibits a large electro- chemical redox stability window of 5.27 V
