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

作者：Matos B R; Santiago E I; Rey J F Q; Ferlauto A S; Traversa E; Linardi M; Fonseca F C^*

来源：Journal of Power Sources, 2011, 196(3): 1061-1068.

DOI：10.1016/j.jpowsour.2010.08.025

• Nafion
• Composite
• PEM fuel cell
• Titania
• Nanotubes

Nafion/titania-based fillers composites are prepared by casting and tested in proton exchange membrane fuel cells (PEMFCs) operating at elevated temperatures (130 degrees 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 H-2/O-2 PEMFCs using composite electrolytes indicate that composite electrolytes contribute to a significant boost of H-2/O-2 PEMFC performance at 130 degrees C.

• 出版日期2011-2-1