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Polysulfone ionomers for proton-conducting fuel cell membranes - 2. Sulfophenylated polysulfones and polyphenylsulfones

Karlsson, Lina LU and Jannasch, Patric LU (2005) In Electrochimica Acta 50(9). p.1939-1946
Abstract
Polysulfones and polyphenylsulfones having pendant phenyl groups with sulfonic acid units have been prepared by lithiation of the respective polymer, followed by reaction with 2-sulfobenzoic acid cyclic anhydride. The resulting ionomers were cast into membranes and properties such as thermal stability, ion-exchange capacity, water sorption and proton conductivity were evaluated. These membranes proved to have a high thermal stability, with a decomposition temperature between 300 and 350degreesC, and a high proton conductivity, 60 mS/cm at 70degreesC for a polyphenylsulfone with 0.9 sulfonic acid group per repeating unit measured at 100% relative humidity. Moreover, some of the membranes endured immersion in water at temperatures ranging... (More)
Polysulfones and polyphenylsulfones having pendant phenyl groups with sulfonic acid units have been prepared by lithiation of the respective polymer, followed by reaction with 2-sulfobenzoic acid cyclic anhydride. The resulting ionomers were cast into membranes and properties such as thermal stability, ion-exchange capacity, water sorption and proton conductivity were evaluated. These membranes proved to have a high thermal stability, with a decomposition temperature between 300 and 350degreesC, and a high proton conductivity, 60 mS/cm at 70degreesC for a polyphenylsulfone with 0.9 sulfonic acid group per repeating unit measured at 100% relative humidity. Moreover, some of the membranes endured immersion in water at temperatures ranging from 20 to 150degreesC without swelling extensively, and therefore kept their mechanical stability under these conditions. It was also shown that these membranes retained a high conductivity up to 150degreesC under humidifying conditions. The combination of properties make these membranes potential candidates for fuel cells operating at temperatures above 100degreesC. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Electrochimica Acta
volume
50
issue
9
pages
1939 - 1946
publisher
Pergamon
external identifiers
  • wos:000227256900018
  • scopus:13544273910
ISSN
0013-4686
DOI
10.1016/j.electacta.2004.09.003
language
English
LU publication?
yes
id
1cafb612-e27d-4d05-9cab-102cbfed4b1a (old id 153055)
date added to LUP
2007-07-13 12:48:11
date last changed
2017-09-10 03:38:30
@article{1cafb612-e27d-4d05-9cab-102cbfed4b1a,
  abstract     = {Polysulfones and polyphenylsulfones having pendant phenyl groups with sulfonic acid units have been prepared by lithiation of the respective polymer, followed by reaction with 2-sulfobenzoic acid cyclic anhydride. The resulting ionomers were cast into membranes and properties such as thermal stability, ion-exchange capacity, water sorption and proton conductivity were evaluated. These membranes proved to have a high thermal stability, with a decomposition temperature between 300 and 350degreesC, and a high proton conductivity, 60 mS/cm at 70degreesC for a polyphenylsulfone with 0.9 sulfonic acid group per repeating unit measured at 100% relative humidity. Moreover, some of the membranes endured immersion in water at temperatures ranging from 20 to 150degreesC without swelling extensively, and therefore kept their mechanical stability under these conditions. It was also shown that these membranes retained a high conductivity up to 150degreesC under humidifying conditions. The combination of properties make these membranes potential candidates for fuel cells operating at temperatures above 100degreesC.},
  author       = {Karlsson, Lina and Jannasch, Patric},
  issn         = {0013-4686},
  language     = {eng},
  number       = {9},
  pages        = {1939--1946},
  publisher    = {Pergamon},
  series       = {Electrochimica Acta},
  title        = {Polysulfone ionomers for proton-conducting fuel cell membranes - 2. Sulfophenylated polysulfones and polyphenylsulfones},
  url          = {http://dx.doi.org/10.1016/j.electacta.2004.09.003},
  volume       = {50},
  year         = {2005},
}