SPEEK/PPSU-based organic-inorganic hybrid membranes: proton conducting electrolytes in anhydrous and wet environments.

M.L. Di Vona, Alessandra D’Epifanio, Debora Marani, Marcella Trombetta, Enrico Traversa, Silvia Licoccia

Research output: Contribution to journalJournal articleResearchpeer-review


A telechelic organic–inorganic polymer (SiPPSU) where –SiPh(OH)2 groups are covalently linked to the polymeric chain of polyphenylsulfone (PPSU) was prepared and characterized. The polymer was sulfonated up to a degree of sulfonation (DS) equal to 2 (SiSPPSU), then used to prepare blends with sulfonated polyetheretherketone (SPEEK) having DS = 0.9 in 5 and 10 wt.% concentration. The synthesized polymers and the blends were characterized by ATR/FT-IR spectroscopy. Membranes were prepared with these materials and their proton conductivity was measured using electrochemical impedance spectroscopy (EIS). The formation of the blends substantially altered the physicochemical characteristics of SPEEK: the membrane prepared with the blend at the concentration of 5 wt.% exhibited high and stable conductivity values at 120 ◦C: both when dry (σ = 6.1×10−3 S/cm) and wet conditions (σ = 6.4×10−2 S/cm for a 50% water uptake), hence, being suitable for application as electrolyte in intermediate temperature polymer electrolyte membrane fuel cells (PEMFCs). © 2005 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalJournal of Membrane Science
Pages (from-to)186–191
Publication statusPublished - 2006
Externally publishedYes


  • Proton exchange membrane
  • Blend
  • Organic–inorganic telechelic polymer
  • Polyetheretherketone (PEEK)
  • Polyphenylsulfone (PPSU)


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