Synthesis and characterization of novel hybrid polysulfone/silica membranes doped with phosphomolybdic acid for fuel cell applications Articles uri icon

publication date

  • October 2015

start page

  • 371

end page

  • 379

volume

  • 492

International Standard Serial Number (ISSN)

  • 0376-7388

Electronic International Standard Serial Number (EISSN)

  • 1873-3123

abstract

  • Novel proton conducting composite membranes based on sulfonated polysulfone (sPSU)/SiO2 doped with phosphomolybdic acid (PMoA) were synthesized, and their proton conductivity in acid solutions was evaluated. The hybrid membranes were prepared by casting and the characterization by scanning electron microscopy (SEM), Fourier transform infrared (FIR) and X-ray diffraction (XRD) confirmed the presence of the inorganic charges into the polymer. Thermal properties and proton conductivity were also studied by means of thermogravimetric analysis (TGA) and electrochemical impedance spectroscopy (EIS), respectively. The incorporation of the inorganic particles modified the thermal and mechanical properties of the sPSU as well as its proton conductivity. Taking into account that a compromise between these properties is necessary, the hybrid membrane with 2%SiO2 and 20%PMoA seems to be a promising candidate for its application in proton-exchange membrane in fuel cells (PEMECs) operated at high temperatures. (C) 2015 Elsevier B.V. All rights reserved

keywords

  • proton-exchange membrane fuel cell; polysulfone; silicon oxide; heteropolyacid; electrochemical impedance spectroscopy