Elsevier

Journal of Power Sources

Volume 196, Issue 3, 1 February 2011, Pages 1061-1068
Journal of Power Sources

Nafion-based composite electrolytes for proton exchange membrane fuel cells operating above 120 °C with titania nanoparticles and nanotubes as fillers

https://doi.org/10.1016/j.jpowsour.2010.08.025Get rights and content
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Abstract

Nafion/titania-based fillers composites are prepared by casting and tested in proton exchange membrane fuel cells (PEMFCs) operating at elevated temperatures (130 °C). Three types of titania-based fillers are studied: nanoparticles with nearly spherical shape, mesoporous particles with high surface area, and hydrogen titanate nanotubes. Properties of composites related to PEMFC operation, such as water absorption/retention and proton conductivity, are determined and correlated with microstructural data obtained by small-angle X-ray scattering. The addition of titanate nanotubes changes more markedly the physical properties of the composite electrolytes as compared to titanium oxide nanoparticles with different surface area, a feature probably related to the intrinsic hydration and proton conductivity of the nanotubes. Polarization curves of H2/O2 PEMFCs using composite electrolytes indicate that composite electrolytes contribute to a significant boost of H2/O2 PEMFC performance at 130 °C.

Keywords

Nafion
Composite
PEM fuel cell
Titania
Nanotubes

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