Enhanced ion mobility in aluminosilicate/polysiloxane network polyelectrolytes

摘要

A new series of polysiloxane-based single-ion conductors was prepared. These contain solvating oligoether sidechains and covalently linked aluminosilicate or alkoxy/siloxy-aluminate anions attached to the polysiloxane backbone. Of these two systmes, the polymers containing aluminosilicate [(SiO)_4Al]~- anions show higher room temperature conductivities (10~-6 S/cm) than those with alkoxy/siloxyaluminate [(SiO)_2(CH_2O)_2Al] anions (10~-7 S/cm). The incorporation of longer covalent tethers between the alkoxy/siloxyaluminate anion and the polymer backbone results in enhaned room temperature conductivities at high ion loadings. Differential scanning calorimetry data provide a rationale for the high conductivity.