Advanced

Radiostation Grafted Ion-Conducting Membranes: The Influence of Variations in Base Film Nanostructure

Sproll, Véronique; Nagy, Gergely; Gasser, Urs; Embs, Jan Peter; Obiols-Rabasa, Marc LU ; Schmidt, Thomas J.; Gubler, Lorenz and Balog, Sandor (2016) In Macromolecules 49(11). p.4253-4264
Abstract
The proton exchange membrane (PEM) is a key element of a polymer electrolyte fuel cell, and radiation-grafting is an attractive option for the synthesis of PEMs. Via a systematic investigation of a well-defined model material, sulfonated polystyrene grafted poly(ethylene-alt-tetrafluoroethylene), ETFE-g-PS(SA), we show that the performance and stability of radiation-grafted PEMs in fuel cells strongly depends on the microstructure of the underlying base polymer. The nanoscale structure of the base polymers, grafted films, and membranes is probed by small-angle scattering, and the nanoscale proton dynamics is probed by quasi-elastic neutron scattering. The results of these techniques correlated with fuel cell relevant properties—including... (More)
The proton exchange membrane (PEM) is a key element of a polymer electrolyte fuel cell, and radiation-grafting is an attractive option for the synthesis of PEMs. Via a systematic investigation of a well-defined model material, sulfonated polystyrene grafted poly(ethylene-alt-tetrafluoroethylene), ETFE-g-PS(SA), we show that the performance and stability of radiation-grafted PEMs in fuel cells strongly depends on the microstructure of the underlying base polymer. The nanoscale structure of the base polymers, grafted films, and membranes is probed by small-angle scattering, and the nanoscale proton dynamics is probed by quasi-elastic neutron scattering. The results of these techniques correlated with fuel cell relevant properties—including proton conductivity and water uptake—and fuel cell performance clearly indicate that differences in the arrangement of the crystalline phase in the otherwise chemically identical semicrystalline base films can have considerable impact, representing an essential aspect to consider in the development of proton exchange membranes prepared via preirradiation grafting. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Macromolecules
volume
49
issue
11
pages
12 pages
publisher
The American Chemical Society
external identifiers
  • Scopus:84974815443
ISSN
0024-9297
DOI
10.1021/acs.macromol.6b00180
language
English
LU publication?
yes
id
880cd029-def1-42d8-8eb4-d2cd6da38659
date added to LUP
2016-07-20 15:29:56
date last changed
2016-10-13 05:11:53
@misc{880cd029-def1-42d8-8eb4-d2cd6da38659,
  abstract     = {The proton exchange membrane (PEM) is a key element of a polymer electrolyte fuel cell, and radiation-grafting is an attractive option for the synthesis of PEMs. Via a systematic investigation of a well-defined model material, sulfonated polystyrene grafted poly(ethylene-alt-tetrafluoroethylene), ETFE-g-PS(SA), we show that the performance and stability of radiation-grafted PEMs in fuel cells strongly depends on the microstructure of the underlying base polymer. The nanoscale structure of the base polymers, grafted films, and membranes is probed by small-angle scattering, and the nanoscale proton dynamics is probed by quasi-elastic neutron scattering. The results of these techniques correlated with fuel cell relevant properties—including proton conductivity and water uptake—and fuel cell performance clearly indicate that differences in the arrangement of the crystalline phase in the otherwise chemically identical semicrystalline base films can have considerable impact, representing an essential aspect to consider in the development of proton exchange membranes prepared via preirradiation grafting.},
  author       = {Sproll, Véronique and Nagy, Gergely and Gasser, Urs and Embs, Jan Peter and Obiols-Rabasa, Marc and Schmidt, Thomas J. and Gubler, Lorenz and Balog, Sandor},
  issn         = {0024-9297},
  language     = {eng},
  month        = {05},
  number       = {11},
  pages        = {4253--4264},
  publisher    = {ARRAY(0x9186c38)},
  series       = {Macromolecules},
  title        = {Radiostation Grafted Ion-Conducting Membranes: The Influence of Variations in Base Film Nanostructure},
  url          = {http://dx.doi.org/10.1021/acs.macromol.6b00180},
  volume       = {49},
  year         = {2016},
}