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Gas diffusion electrodes and membrane electrode assemblies based on a sulfonated polysulfone for high-temperature PEMFC

von Kraemer, Sophie; Puchner, Mario LU ; Jannasch, Patric LU ; Lundblad, Anders and Lindbergh, Göran (2006) In Journal of the Electrochemical Society 153(11). p.2077-2084
Abstract
Membrane electrode assemblies (MEAs) with a sulfonated polysulfone (sPSU) as the proton-conducting phase were fuel cell evaluated at varying temperatures in over-humidified conditions. The sPSU was prepared by a direct polycondensation involving a commercially available sulfonated naphthalene diol monomer. The gas diffusion electrodes (GDEs) and MEAs were successfully fabricated and a thorough morphological study was subsequently carried out on GDEs with varying sPSU contents and ink solvents. The scanning electron microscopy and porosimetry studies revealed highly porous GDE morphologies at sPSU contents below 20 wt%. Double-layer capacitance measurements showed an almost fully sPSU-wetted electronic phase when the sPSU content was 10... (More)
Membrane electrode assemblies (MEAs) with a sulfonated polysulfone (sPSU) as the proton-conducting phase were fuel cell evaluated at varying temperatures in over-humidified conditions. The sPSU was prepared by a direct polycondensation involving a commercially available sulfonated naphthalene diol monomer. The gas diffusion electrodes (GDEs) and MEAs were successfully fabricated and a thorough morphological study was subsequently carried out on GDEs with varying sPSU contents and ink solvents. The scanning electron microscopy and porosimetry studies revealed highly porous GDE morphologies at sPSU contents below 20 wt%. Double-layer capacitance measurements showed an almost fully sPSU-wetted electronic phase when the sPSU content was 10 wt%. The MEAs were prepared by applying the GDEs directly onto sPSU membranes. MEAs with a total Pt loading of 0.2 mg/cm2 were successfully fuel cell operated at 120°C. The MEAs showed mass-transport limitations in the range of 600–800 mA/cm2, most probably caused by abundant water due to the overhumidified measuring conditions. The low resistance of the MEAs indicated a well-integrated structure between the GDEs and the membrane. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Electrochemical Society
volume
153
issue
11
pages
2077 - 2084
publisher
The Electrochemical Society
external identifiers
  • wos:000241057000011
  • scopus:33749612550
ISSN
0013-4651
DOI
10.1149/1.2335979
language
English
LU publication?
yes
id
dc713a29-41ed-4513-b345-206ce1719417 (old id 160695)
date added to LUP
2007-07-13 16:53:19
date last changed
2019-07-02 01:52:01
@article{dc713a29-41ed-4513-b345-206ce1719417,
  abstract     = {Membrane electrode assemblies (MEAs) with a sulfonated polysulfone (sPSU) as the proton-conducting phase were fuel cell evaluated at varying temperatures in over-humidified conditions. The sPSU was prepared by a direct polycondensation involving a commercially available sulfonated naphthalene diol monomer. The gas diffusion electrodes (GDEs) and MEAs were successfully fabricated and a thorough morphological study was subsequently carried out on GDEs with varying sPSU contents and ink solvents. The scanning electron microscopy and porosimetry studies revealed highly porous GDE morphologies at sPSU contents below 20 wt%. Double-layer capacitance measurements showed an almost fully sPSU-wetted electronic phase when the sPSU content was 10 wt%. The MEAs were prepared by applying the GDEs directly onto sPSU membranes. MEAs with a total Pt loading of 0.2 mg/cm2 were successfully fuel cell operated at 120°C. The MEAs showed mass-transport limitations in the range of 600–800 mA/cm2, most probably caused by abundant water due to the overhumidified measuring conditions. The low resistance of the MEAs indicated a well-integrated structure between the GDEs and the membrane.},
  author       = {von Kraemer, Sophie and Puchner, Mario and Jannasch, Patric and Lundblad, Anders and Lindbergh, Göran},
  issn         = {0013-4651},
  language     = {eng},
  number       = {11},
  pages        = {2077--2084},
  publisher    = {The Electrochemical Society},
  series       = {Journal of the Electrochemical Society},
  title        = {Gas diffusion electrodes and membrane electrode assemblies based on a sulfonated polysulfone for high-temperature PEMFC},
  url          = {http://dx.doi.org/10.1149/1.2335979},
  volume       = {153},
  year         = {2006},
}