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Título

Synthesis and characterization of proton-conducting sol–gel membranes produced from 1,4-bis(triethoxysilyl)benzene and (3-glycidoxypropyl)trimethoxysilane

AutorAparicio, Mario; Mosa Ruiz, Jadra; Sánchez Barrera, Florencio ; Durán, Alicia
Palabras clavePEMFC
Hybrid conductor
Fecha de publicación2005
EditorElsevier
CitaciónJournal of Power Sources 151 (2005) 57–62
ResumenHybrid membranes using 1,4-bis(triethoxysilyl)benzene and (3-glycidoxypropyl)trimethoxysilane have been synthesised by polymerization of epoxy groups and inorganic condensation of silanol groups. Sulfonation processes of aromatic rings to produce attached SO3H groups are applied to provide proton conductivity. Thermal analysis shows a highwater adsorption capacity combining SO3 − and silanol groups. The measurement of conductivity shows a general increase with temperature, and stabilization at temperatures above 100 ◦C. This behaviour suggests the presence of two competing trends, one enhancing (thermal activation) and the other reducing (dehydration) conductivity. The water retention properties provided by SO3 − and silanol groups lead to relatively high proton conductivity (maximum values around 8.5×10−4 S cm−1) at 100–150 ◦C.
Versión del editordoi:10.1016/j.jpowsour.2005.03.042
URIhttp://hdl.handle.net/10261/31506
DOI10.1016/j.jpowsour.2005.03.042
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