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 H-1 and B-11 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 x 10(-6) to 5.4 x 10(-6) S cm(-1) at 51 degrees 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. (C) 2009 Elsevier B.V. All rights reserved.