Journal article
SPEEK/PPSU-based organic–inorganic membranes: proton conducting electrolytes in anhydrous and wet environments
Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientiflca 1, 00133 Rome, Italy1
C.I.R.-Centro Interdisciplinare di Ricerca, Università Campus Bio-Medico, via Longoni 83, 00155 Rome, Italy2
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 10wt.% 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 5wt.% exhibited high and stable conductivity values at 120°C: both when dry (σ=6.1×10−3S/cm) and wet conditions (σ=6.4×10−2S/cm for a 50% water uptake), hence, being suitable for application as electrolyte in intermediate temperature polymer electrolyte membrane fuel cells (PEMFCs).
Language: | English |
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Year: | 2005 |
Pages: | 186-191 |
ISSN: | 18733123 and 03767388 |
Types: | Journal article |
DOI: | 10.1016/j.memsci.2005.12.003 |