skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Copoly(arlene ether)s containing pendant sulfonic acid groups as proton exchange membrane

Abstract

A copoly(arylene ether) (PAE) with high fluorine content and a copoly(arylene ether nitrile) (PAEN) with high nitrile content, each containing pendant phenyl sulfonic acids were synthesized. The P AE and PAEN were prepared from decafluorobiphenyl (DFBP) and difluorobenzonitrile (DFBN) respectively, by polycondensation with 2-phenylhydroquinone (PHQ) by conventional aromatic nucleophilic substitution reactions. The sulfonic acid groups were introduced by mild post-sulfonation exclusively on the para-position of the pendant phenyl ring in PHQ. The membrane properties of the resulting sulfonated copolymers sP AE and sP AEN were compared for fuel cell applications. The copolymers sPAE and sPAEN, each having a degree of sulfonation (DS) of 1.0 had high ion exchange capacities (IEC{sub v}(wet) (volume-based, wet state)) of 1.77 and 2.55 meq./cm{sup 3}, high proton conductivities of 135.4 and 140.1 mS/cm at 80 C, and acceptable volume-based water uptake of 44.5-51.9 vol% at 80 C, respectively, compared to Nafion. The data points of these copolymer membranes are located in the area of outstanding properties in the trade-off plot of alternative hydrocarbon polyelectrolyte membranes (PEM) for the relationship between proton conductivity versus water uptake (weight based or volume based). Furthermore, the relative selectivity derived from proton conductivity and methanol permeability is higher than thatmore » of Nafion.« less

Authors:
 [1];  [2];  [2];  [2]
  1. Los Alamos National Laboratory
  2. CANADA NRC
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
964944
Report Number(s):
LA-UR-08-04560; LA-UR-08-4560
Journal ID: ISSN 0897-4756; CMATEX; TRN: US200919%%380
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Name: Chemistry of Materials; Journal ID: ISSN 0897-4756
Country of Publication:
United States
Language:
English
Subject:
36; AROMATICS; COPOLYMERS; ETHERS; FLUORINE; FUEL CELLS; HYDROCARBONS; ION EXCHANGE; MEMBRANES; METHANOL; NITRILES; PERMEABILITY; PROTONS; SULFONATION; SULFONIC ACIDS; WATER

Citation Formats

Kim, Yu Seung, Kim, Dae Sik, Robertson, Gilles, and Guiver, Michael. Copoly(arlene ether)s containing pendant sulfonic acid groups as proton exchange membrane. United States: N. p., 2008. Web.
Kim, Yu Seung, Kim, Dae Sik, Robertson, Gilles, & Guiver, Michael. Copoly(arlene ether)s containing pendant sulfonic acid groups as proton exchange membrane. United States.
Kim, Yu Seung, Kim, Dae Sik, Robertson, Gilles, and Guiver, Michael. Tue . "Copoly(arlene ether)s containing pendant sulfonic acid groups as proton exchange membrane". United States. https://www.osti.gov/servlets/purl/964944.
@article{osti_964944,
title = {Copoly(arlene ether)s containing pendant sulfonic acid groups as proton exchange membrane},
author = {Kim, Yu Seung and Kim, Dae Sik and Robertson, Gilles and Guiver, Michael},
abstractNote = {A copoly(arylene ether) (PAE) with high fluorine content and a copoly(arylene ether nitrile) (PAEN) with high nitrile content, each containing pendant phenyl sulfonic acids were synthesized. The P AE and PAEN were prepared from decafluorobiphenyl (DFBP) and difluorobenzonitrile (DFBN) respectively, by polycondensation with 2-phenylhydroquinone (PHQ) by conventional aromatic nucleophilic substitution reactions. The sulfonic acid groups were introduced by mild post-sulfonation exclusively on the para-position of the pendant phenyl ring in PHQ. The membrane properties of the resulting sulfonated copolymers sP AE and sP AEN were compared for fuel cell applications. The copolymers sPAE and sPAEN, each having a degree of sulfonation (DS) of 1.0 had high ion exchange capacities (IEC{sub v}(wet) (volume-based, wet state)) of 1.77 and 2.55 meq./cm{sup 3}, high proton conductivities of 135.4 and 140.1 mS/cm at 80 C, and acceptable volume-based water uptake of 44.5-51.9 vol% at 80 C, respectively, compared to Nafion. The data points of these copolymer membranes are located in the area of outstanding properties in the trade-off plot of alternative hydrocarbon polyelectrolyte membranes (PEM) for the relationship between proton conductivity versus water uptake (weight based or volume based). Furthermore, the relative selectivity derived from proton conductivity and methanol permeability is higher than that of Nafion.},
doi = {},
journal = {Chemistry of Materials},
issn = {0897-4756},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {1}
}