A lithium Z-IOPE ionomer based on PEG600, (CH3)2SnCl2, and Li3Fe(CN)6

In this report, the preparation of a new zeolitic inorganic-organic polymer electrolyte (Z-IOPE) ionomer material by using (CH3)2SnCl2, Li3Fe(CN)6, and poly(ethylene glycol)600 as precursors is described. Scanning electron microscopy measurements,vibrational spectroscopy studies (far infrared, medium infrared, Raman laser), UV-visible investigations and microanalytical data gave detailed insight about the morphological and structural characteristics of this electrolytic complex and about the ion-ion/ion-polymer interactions in the system. Thermogravimetric and differential scanning calorimetry studies indicated that: (i) the material is stable up to about 140 °C; (ii) the Tg is equal to −50.5 °C; (iii) a crystallization process occurs at 20.9°C. 1H and 7Li nuclear magnetic resonance measurements of the linewidth, spin-lattice relaxation, and pulsed field gradient diffusion were carried out suggesting the correlation of the lithium dynamics with polymer mobility. The conductivity mechanism in bulk material was investigated by electrical spectroscopy in the 10 mHz to 1 GHz range, between −60 and 80°C. The results were interpreted in terms of the relaxation events detected in the real and imaginary components of dielectric and conductivity spectra. The overall investigation led to the conclusion that the material conducts ionically, with a conductivity of 3.9x10−5 S/cm at 25.1°C with unity lithium transport number.