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Effect of Crystallization on Proton Transport in Model Polymer Electrolyte Membranes

Beers, Keith M.; Wong, David T.; Jackson, Andrew LU ; Wang, Xin; Pople, John A.; Hexemer, Alexander and Balsara, Nitash P. (2014) In Macromolecules 47(13). p.4330-4336
Abstract
Polymer electrolyte membranes with bicontinuous microphases comprising soft hydrated domains and mechanically robust hydrophobic domains are used in a wide range of electrochemical devices induding fuel cells and electrolyzers. The self-assembly, water uptake, and proton conductivity of model block copolymer electrolytes with semicrystalline hydrophobic blocks were investigated. A series of sulfonated polystyrene-block-polyethylene (PSS-PE) copolymers were synthesized to probe the interplay between crystallization, morphology, hydration, and proton transport. In block copolymer systems with amorphous hydrophobic blocks, it has been shown that higher water update and proton conductivity are obtained in low molecular weight systems. However,... (More)
Polymer electrolyte membranes with bicontinuous microphases comprising soft hydrated domains and mechanically robust hydrophobic domains are used in a wide range of electrochemical devices induding fuel cells and electrolyzers. The self-assembly, water uptake, and proton conductivity of model block copolymer electrolytes with semicrystalline hydrophobic blocks were investigated. A series of sulfonated polystyrene-block-polyethylene (PSS-PE) copolymers were synthesized to probe the interplay between crystallization, morphology, hydration, and proton transport. In block copolymer systems with amorphous hydrophobic blocks, it has been shown that higher water update and proton conductivity are obtained in low molecular weight systems. However, crystallization is known to disrupt the self-assembly of low molecular weight block copolymers. We found that this disruption results in lower water uptake and proton conductivity. Increasing molecular weight results in less morphological disruption and improvement in performance. (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
47
issue
13
pages
4330 - 4336
publisher
The American Chemical Society
external identifiers
  • wos:000338806400021
  • scopus:84903973457
ISSN
0024-9297
DOI
10.1021/ma500298w
language
English
LU publication?
yes
id
5f0486ed-ec87-4301-8d62-ca67759d0c36 (old id 4598962)
date added to LUP
2014-09-05 09:07:19
date last changed
2017-01-01 03:38:03
@article{5f0486ed-ec87-4301-8d62-ca67759d0c36,
  abstract     = {Polymer electrolyte membranes with bicontinuous microphases comprising soft hydrated domains and mechanically robust hydrophobic domains are used in a wide range of electrochemical devices induding fuel cells and electrolyzers. The self-assembly, water uptake, and proton conductivity of model block copolymer electrolytes with semicrystalline hydrophobic blocks were investigated. A series of sulfonated polystyrene-block-polyethylene (PSS-PE) copolymers were synthesized to probe the interplay between crystallization, morphology, hydration, and proton transport. In block copolymer systems with amorphous hydrophobic blocks, it has been shown that higher water update and proton conductivity are obtained in low molecular weight systems. However, crystallization is known to disrupt the self-assembly of low molecular weight block copolymers. We found that this disruption results in lower water uptake and proton conductivity. Increasing molecular weight results in less morphological disruption and improvement in performance.},
  author       = {Beers, Keith M. and Wong, David T. and Jackson, Andrew and Wang, Xin and Pople, John A. and Hexemer, Alexander and Balsara, Nitash P.},
  issn         = {0024-9297},
  language     = {eng},
  number       = {13},
  pages        = {4330--4336},
  publisher    = {The American Chemical Society},
  series       = {Macromolecules},
  title        = {Effect of Crystallization on Proton Transport in Model Polymer Electrolyte Membranes},
  url          = {http://dx.doi.org/10.1021/ma500298w},
  volume       = {47},
  year         = {2014},
}