Journal
MATERIALS LETTERS
Volume 47, Issue 4-5, Pages 241-246Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0167-577X(00)00241-X
Keywords
solid electrolyte; conductive membrane; proton conduction; silicotungstic acid; polybenzimidazole
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Membranes formed by polybenzimidazole and silicotungstic acid supported on silica have been prepared. The membranes were characterized in order to evaluate their proton conduction, mechanical stability and structural characteristics. Silica produced a beneficial effect on proton conduction of the membranes. The membranes with 50 wt.% of SiWA-SiO2/PBI was mechanically stable and gave proton conductivity of 1.2 x 10(-3) S cm(-1) at 160 degreesC and 100% relative humidity. All the materials prepared had amorphous structure. (C) 2001 Elsevier Science B.V. All rights reserved.
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