Affordable Access

Publisher Website

Preparation and properties of crosslinked sulphonated poly(arylene ether sulphone) blend s for direct methanol fuel cell applications

Authors
Journal
Journal of Power Sources
0378-7753
Publisher
Elsevier
Publication Date
Volume
195
Issue
13
Identifiers
DOI: 10.1016/j.jpowsour.2010.01.057
Keywords
  • Proton Exchange Membrane
  • Sulphonated Poly(Arylene Ether Sulphone)
  • Cross-Linking
  • Direct Methanol Fuel Cell
  • 4
  • 4′-Dihydroxy-α-Methylstilbene (Hms)

Abstract

Abstract HMS-based sulphonated poly(arylene ether sulphone) (HMSSH) is synthesised using 4,4′-dihydroxy-α-methylstilbene (HMS) monomer to introduce an interesting stilbene core as crosslinkable group. Crosslinked blend membranes are obtained by blending the BPA-based sulphonated poly(arylene ether sulphone) (BPASH) with crosslinkable HMS-based sulphonated poly(arylene ether sulphone) by UV irradiation of the blend membrane. Compared to the native BPASH with crosslinked BPASH/HMSSH blend membranes, the crosslinked blend membranes greatly reduce the water uptake and methanol permeability with only a slight reduction in proton conductivity. The crosslinked blend membrane, which has a 6% HMSSH content, has a water uptake of 59%, methanol permeability of 0.75 × 10 −6 cm 2 s −1, and proton conductivity of 0.08 S cm −1. A membrane-electrode assembly is used to investigate single-cell performance and durability test for DMFC applications. Both the power density and open circuit voltage are higher than those of Nafion ® 117. A maximum power density of 32 mW cm −2 at 0.2 V is obtained at 80 °C, which is higher than that of Nafion ® 117 (25 mW cm −2).

There are no comments yet on this publication. Be the first to share your thoughts.