New polymer electrolyte membranes for fuel cells

Annika Weiber, Hai-Son Dang, Shogo Takamuku, Patric Jannasch

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingResearchpeer-review

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.
Original languageEnglish
Title of host publicationProceedings of CIMTEC 2014
PublisherTrans Tech Publications
Publication statusPublished - 2014
Event6th Forum on New Materials - Montecatini Terme, Tuscany, Italy
Duration: 2014 Jun 152014 Jun 19

Conference

Conference6th Forum on New Materials
Country/TerritoryItaly
CityMontecatini Terme, Tuscany
Period2014/06/152014/06/19

Bibliographical note

Invited lecture in session FA-2: "Proton-conducting and Alkaline Polymer Electrolyte Fuel Cells". Part of the 13th senior edition of the International Conferences on Modern Materials and Technologies (CIMTEC 2014). Presentation FA-2:IL09.

Subject classification (UKÄ)

  • Chemical Sciences

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