Showing papers by "Philippe Belleville published in 2008"
TL;DR: In this article, the authors describe the elaboration and characterization of new hybrid membranes all the way from the precursor solution to the evaluation of the fuel cell performances, which are extensively characterized with the determination of their physicochemical and electrochemical properties.
Abstract: Organic−inorganic hybrid membranes of Nafion and mesoporous silica containing sulfonic acid groups were synthesized using the sol−gel process with the goal of increasing the proton conductivity and water retention at higher temperatures and lowering relative humidities as well as improving the dimensional stability. These hybrid membranes were prepared via in situ co-condensation of tetraethoxysilane and chlorosulfonylphenethylsilane via self-assembly route using organic surfactants as templates for the tuning of the architecture of the silica or hybrid organosilica components. In this paper, we describe the elaboration and characterization of new hybrid membranes all the way from the precursor solution to the evaluation of the fuel cell performances. These hybrid materials were extensively characterized with the determination of their physicochemical and electrochemical properties. The membrane containing functionalized silica showed a higher ionic exchange capacity and greater water management than stan...
283 citations
TL;DR: In this paper, the performance of solid-state hybrid dye-sensitized solar cells (DSSC), based on polythiophene polymers as hole-transporting materials, have been compared by varying TiO2 mesoporous n-semiconductor film microstruture parameters such as the crystalline phase (brookite and anatase), initial crystallite size and sintering temperature conditions.
Abstract: The performance of solid-state hybrid dye-sensitized solar cells (DSSC), based on polythiophene polymers as hole-transporting materials, have been compared by varying TiO2 mesoporous n-semiconductor film microstruture parameters such as the crystalline phase (brookite and anatase), initial crystallite size and sintering temperature conditions. For both crystalline phases a rise in the TiO2 mesoporous film curing temperature from 450 °C to 600 °C produces a twofold increase in the energy conversion efficiency leading to a significant current density improvement. When using the same solar-cell preparation process and a 500-nm-thick photoactive layer, the cells made up of brookite and anatase mesoporous materials give a reproducible solar energy conversion efficiency that reaches 0.48 % and 0.74 %, respectively (at standard AM 1.5).(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
38 citations