Paper Title:
Synthesis and Properties of Sulfonated Polyimide/Polybenzimidazole Cross-Linked Membranes for Fuel Cell Applications
  Abstract

A series of cross-linked proton exchange membranes with the ion exchange capacities (IECs) of 0.70 - 1.52 meq/g have been prepared via the reaction of the anhydride-terminated sulfonated polyimide oligomers (SPI-3, SPI-5 and SPI-7, here the figure refers to the averaged block length) and the polybenzimidazole with pendant amino groups (H2N-PBI) in dimethylsulfoxide (DMSO) during the membrane cast process. The prepared cross-linked membranes showed high tensile strength (55 - 80 MPa) and good water stability (> 2 months in deionized water at 100 °C). Fenton’s test revealed that all the cross-linked membranes displayed significantly better radical oxidative stability than the corresponding pure SPIs. This is attributed to the presence of the highly oxidative-stable PBI component in the cross-linked membranes. The proton conductivities of the cross-linked membranes increased with increasing temperature and relative humidity. The cross-linked membrane prepared from the longest oligomer (SPI-7) displayed the highest proton conductivity which is comparable to that of Nafion 117.

  Info
Periodical
Advanced Materials Research (Volumes 287-290)
Chapter
Hydrogen and Fuel Cell Science, Engineering & Technology
Edited by
Jinglong Bu, Pengcheng Wang, Liqun Ai, Xiaoming Sang, Yungang Li
Pages
2516-2521
DOI
10.4028/www.scientific.net/AMR.287-290.2516
Citation
Z. J. Xia, H. Xu, X. X. Guo, J. H. Fang, "Synthesis and Properties of Sulfonated Polyimide/Polybenzimidazole Cross-Linked Membranes for Fuel Cell Applications", Advanced Materials Research, Vols. 287-290, pp. 2516-2521, 2011
Online since
July 2011
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Price
$32.00
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