Martínez Morlanes, María JoséMartos Gómez, Ana MaríaVarez, AlejandroLevenfeld Laredo, Belén2016-03-172015-10-15Journal of membrane science, 492 (2015), pp. 371–3790376-7388https://hdl.handle.net/10016/22588Novel 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.9application/pdfeng© 2015 Elsevier B.V.Proton-exchange membrane fuel cellPolysulfoneSilicon oxideHeteropolyacidElectrochemical impedance spectroscopyresearch articleEnergías RenovablesMateriales10.1016/j.memsci.2015.05.031open access371379Journal of membrane science492AR/0000017146