Journal
JOURNAL OF POWER SOURCES
Volume 195, Issue 23, Pages 7720-7726Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2010.04.087
Keywords
Nafion; Blend membranes; Poly(1-vinyl-1,2,4-triazole); Proton conductivity; Polymer electrolyte membrane fuel cell
Ask authors/readers for more resources
In this study, proton conducting Nafion-poly(1-vinyl-1,2,4-triazole) blends are produced. Nafion/polymer blend membranes are prepared by means of film casting from the Nafion-PVTri solutions at several molar ratios of PVTri repeat unit to -SO3H. The chemical structure of the homopolymer PVTri is confirmed by FT-IR and C-13 NMR. Thermal properties are investigated via thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) and the results illustrated that all these Nafion-PVTri electrolytes are thermally stable at least up to 300 degrees C. The membrane properties are further characterized for their morphology by scanning electron microscopy (SEM) and water uptake measurements. The methanol permeability of these membranes is measured and the results exhibited that they have quite lower methanol permeability compared to pristine Nafion112. The electrochemical properties of PVTri are investigated by cyclic voltammetry. The conductivity of Nafion-P(VTri)(1) blend membranes is measured to be 5.3 x 10(-4) S cm(-1) at 220 degrees C, in anhydrous state. The conductivity of blend increased at least three orders of magnitude up on hydration, i.e., exceeding 10(-3) S cm(-1) with RH = 50% at ambient temperature. (C) 2010 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available