Cited by 66Fuel Cells and Related MaterialsMembrane Separation and Gas TransportAdvancements in Solid Oxide Fuel Cells

Blended Polyphosphazene/Polyacrylonitrile Membranes for Direct Methanol Fuel Cells

Carter, R., Wycisk, R., Yoo, H., Pintauro, P. N.·2002·Electrochemical and Solid-State Letters

Abstract

Direct liquid methanol fuel cell tests were performed with membrane electrode assemblies (MEAs) fabricated with polyphosphazene-based proton-exchange membranes. The membranes were prepared from sulfonated poly[bis(3-methylphenoxy)phosphazene] that was blended with polyacrylonitrile and then UV cross-linked using benzophenone as the photoinitiator. MEAs worked best when a high ion-exchange capacity (high conductivity) polyphosphazene membrane contacted the electrodes, in which case the fuel cell power output was nearly the same as that with Nafion 117 (for current densities ⩽ 0.15 A / cm 2 ) , but the methanol crossover was three times lower than that of Nafion. With a three-membrane composite MEA (a methanol-blocking film sandwiched between two high conductivity membranes), there was a significant decrease in crossover (ten times lower than that of Nafion 117) with a modest decrease in current-voltage behavior. © 2002 The Electrochemical Society. All rights reserved.

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Crossref · 10.1149/1.1495916

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  • Membranes from UV-cross-linked blends of sulfonated poly[bis(3-methylphenoxy)phosphazene] and polyacrylonitrile used in a DMFC had reduced methanol crossover but lower current-voltage performance than Nafion 117.

    “Although the methanol crossover was reduced, the current-voltage performance was lower than that obtained with Nafion 117.”
  • Sulfonated poly(alkylphenoxy)phosphazenes possess acceptably high proton conductivity, crosslinkability, and low methanol permeability.

    “who showed that sulfonated poly͑alkylphe-noxy͒phosphazenes possess an acceptably high proton conductivity, crosslinkability, and low methanol permeability.”

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Authors
Carter, R., Wycisk, R., Yoo, H., & Pintauro, P. N.
Affiliations
Tulane University (US)
Venue
Electrochemical and Solid-State Letters
Published
2002
Volume
5
Issue
9
Pages
A195
ISSN
1099-0062 (ISSN-L)
OpenAlex
W2025832176
Cited by
66
References
11
Citations by year
2021: 1 · 2020: 3 · 2019: 1 · 2018: 2 · 2017: 1 · 2016: 4 · 2015: 3 · 2014: 3 · 2013: 2 · 2012: 2
FWCI
5.25
Type
journal article
Language
en
Open access
closed
Locations
Electrochemical and Solid-State Letters (publishedVersion)
Funders
  • Tulane University
  • Army Research Office
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
  • Physical Sciences › Engineering › Mechanical Engineering › Membrane Separation and Gas Transport
  • Physical Sciences › Materials Science › Materials Chemistry › Advancements in Solid Oxide Fuel Cells
Keywords
direct methanol fuel cells, polyacrylonitrile, proton exchange membranes, membrane electrode assembly, methanol crossover, UV crosslinking, benzophenone photoinitiator, Nafion 117, ion exchange capacity, composite membranes

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