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New polymer electrolyte membranes for fuel cells

Weiber, Annika LU ; Dang, Hai-Son LU ; Takamuku, Shogo LU and Jannasch, Patric LU (2014) 6th Forum on New Materials In Proceedings of CIMTEC 2014
Abstract
Durable polymers functionalized with acidic or basic groups are currently developed for proton- or anion-exchange membrane (PEM or AEM) fuel cells, respectively. The properties of perfluorosulfinic acid PEMs restrict the conditions under which these fuel cells can be operated because of limitations conductivity and stability. We are presently pursuing different approaches to alternative membranes where sulfonic acid groups are concentrated to selected aromatic segments in the polymeric structure to induce a higher level of organization of the conducting phase domains in the PEM. This includes for example the preparation of various highly stable hydrophilic-hydrophobic multiblock copolymers with blocks having very high acid contents. This... (More)
Durable polymers functionalized with acidic or basic groups are currently developed for proton- or anion-exchange membrane (PEM or AEM) fuel cells, respectively. The properties of perfluorosulfinic acid PEMs restrict the conditions under which these fuel cells can be operated because of limitations conductivity and stability. We are presently pursuing different approaches to alternative membranes where sulfonic acid groups are concentrated to selected aromatic segments in the polymeric structure to induce a higher level of organization of the conducting phase domains in the PEM. This includes for example the preparation of various highly stable hydrophilic-hydrophobic multiblock copolymers with blocks having very high acid contents. This leads to excellent performance and high proton conductivity at low relative humidity. AEM fuel cells hold the promise of platinum free catalysis, but present critical challenges in terms of membrane conductivity and stability. Here, we are preparing and studying various aromatic AEMs which contain very high local concentrations of ammonium moieties for high anionic conductivity and enhanced durability. Macromolecular design principles, synthetic procedures and important structure-property relationships of these new materials will be discussed. (Less)
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Proceedings of CIMTEC 2014
publisher
Trans Tech Publications Ltd
conference name
6th Forum on New Materials
language
English
LU publication?
yes
id
46f22bd4-6269-490b-bfd0-83dc2ad22c94 (old id 4317804)
date added to LUP
2014-07-03 12:11:32
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2016-04-16 09:28:14
@inproceedings{46f22bd4-6269-490b-bfd0-83dc2ad22c94,
  abstract     = {Durable polymers functionalized with acidic or basic groups are currently developed for proton- or anion-exchange membrane (PEM or AEM) fuel cells, respectively. The properties of perfluorosulfinic acid PEMs restrict the conditions under which these fuel cells can be operated because of limitations conductivity and stability. We are presently pursuing different approaches to alternative membranes where sulfonic acid groups are concentrated to selected aromatic segments in the polymeric structure to induce a higher level of organization of the conducting phase domains in the PEM. This includes for example the preparation of various highly stable hydrophilic-hydrophobic multiblock copolymers with blocks having very high acid contents. This leads to excellent performance and high proton conductivity at low relative humidity. AEM fuel cells hold the promise of platinum free catalysis, but present critical challenges in terms of membrane conductivity and stability. Here, we are preparing and studying various aromatic AEMs which contain very high local concentrations of ammonium moieties for high anionic conductivity and enhanced durability. Macromolecular design principles, synthetic procedures and important structure-property relationships of these new materials will be discussed.},
  author       = {Weiber, Annika and Dang, Hai-Son and Takamuku, Shogo and Jannasch, Patric},
  booktitle    = {Proceedings of CIMTEC 2014},
  language     = {eng},
  publisher    = {Trans Tech Publications Ltd},
  title        = {New polymer electrolyte membranes for fuel cells},
  year         = {2014},
}