Ionic Conductivity of Ion-Exchange Membranes Based on Polynaphthoylenimide Doped by Phosphate-Modified Zirconia

Abstract

The synthesis of phosphate-modified zirconia nanoparticles in pores of a polynaphthoylenimide-based membrane material has been carried out via an in situ method. The transport properties of the obtained samples have been studied. It has been shown that doping leads to an increase in the ionic conductivity of the membranes. According to the impedance spectroscopy data, the highest ionic conductivity upon contact with water is reached for samples with a dopant content of 1–2%. At the same time, samples with a higher dopant content retain a sufficiently high conductivity even under air-dry conditions.