A Novel Keggin-type Monovanadium-substituted Polyoxometalate-based Electrolyte

Abstract

Abstract.A novel Keggin-type polyoxometalate-based electrolyte, [TEAPS] 4 PW 11 VO 40 , has been synthesized by triethylamine containing 1-(3-sulfonic group) propyl (TEAPS) and monovanadium-substituted Keggin heteropoly acid (H 4 PW 11 VO 40 ) and characterized by IR, UV, XRD, TG-DTA. The product is solid state with high viscosity at room temperature and it shows a phase transition as the temperature is raised. It exhibits high conductivity (3.90×10 -3 S·cm -1 at 83 °C and 30% relative humidity), with a conductive activation energy of 23.78 kJ·mol -1 . In the range of measured temperature, its conductivity increases with higher temperature.