Niobium and Antimony-modified Titanium Dioxide/Epoxy Thin Film for Proton Exchange Membrane Fuel Cell

摘要

Inorganic Mesoporous Membrane is a new alternative to improve high-temperature fuel cell performance in proton exchange membrane fuel cells (PEMFCs) to substitute for Nafion. It possess high porosity and high specific surface areas, resulting in high proton conductivity. In this study, niobium-modified titania and antimony/niobium-modified titania ceramic were prepared via the sol-gel technique. The various contents of antimony, 0 to 3 wt%, and 3% niobium are incorporated into titania to improve the porous surface condition of the ceramic particles. The xerogels were heated at about 500°C. Inorganic membranes were prepared by using the spin-coating technique using epoxy resin as a binder. The physical, chemical, and electrical properties of these membranes were investigated. The XRD and Raman results showed that pure TiO_2 and doped TiO_2 nanoparticles obtained possess an anatase structure with mesoporosity. The specific surface area of the doped TiO_2 was higher than that of pure TiO_2 and it is worth pointing out that the doping of antimony affected the surface areas more than the doping of niobium in TiO_2. Moreover, these membranes were also tested to evaluate their potential use as an electrolyte in PEMFC by using impedance spectroscopy, TGA, mechanical properties and water uptake.