Synthesis of supramolecular solid polymer electrolytes via self-assembly of diborylated ionic liquid

Novel supramolecular type solid polymer electrolytes were prepared by self-assembly of diborylated ionic liquid in the presence of bifunctional ligands. The polymers obtained were well soluble in methanol, and their structures were supported by 1H and 11B NMR spectra. The ionic conductivity of the polymers was evaluated by ac-impedance method after the samples were dried thoroughly. The ionic conductivity observed was 8.8 × 10−6 to 5.4 × 10−6 S cm−1 at 51 °C in the presence of equimolar amount of LiTFSA to ionic liquid unit. The temperature dependence of ionic conductivity was successfully fitted to VFT (Vogel–Fulcher–Tamman) plots, indicating that ionic conduction is taking place according to typical ion transport model in viscous matrix.