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Lookup NU author(s): Dr Xu Wu,
Emeritus Professor Keith Scott
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Titanate nanotubes (TiO2-NT) were functionalized with sulfonic acid functional groups and characterized with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). Results confirmed that sulfonic acid groups were grafted onto TiO2-NT with a uniform distribution. When the functionalized titanate nanotube (F-TiO2-NT) was incorporated in perfluorosulfonic acid membranes, the membrane conductivity and water uptake were improved. Polymer electrolyte membrane (PEM) fuel cells using 5wt.% F-TiO2-NT incorporated composite membrane exhibited a peak power density of 429mWcm(-2) with non-humidified O-2 at 90 degrees C, which is about four times higher than that with Nafion 117 membrane at identical conditions. PEMWE with 5wt.% F-TiO2-NT incorporated composite membrane achieved 1,000mAcm(-2) current density at voltages below 1.6V at 90 degrees C without back pressurizing.
Author(s): Wu X, Scott K
Publication type: Article
Publication status: Published
Journal: Fuel Cells
Print publication date: 01/12/2013
Online publication date: 16/09/2013
Acceptance date: 22/08/2013
ISSN (print): 1615-6846
ISSN (electronic): 1615-6854
Publisher: Wiley - VCH Verlag GmbH & Co. KGa
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