Multiblock copolymers with locally high ionic concentration for anion exchange membranes

Annika Weiber, David Meis, Patric Jannasch

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

Abstract

With the use of alkaline membrane fuel cells (AMFCs) there is a possibility to utilize low temperature fuel cell technology without the need of scarce and expensive noble metal catalysts. With this technology there is, however, a need to enhance the stability and ionic conductivity of anion-exchange membranes (AEMs) before AMFCs can be a viable alternative to the more studied proton-exchange membrane fuel cells. In the presented work we have aimed to improve the anionic conductivity by synthesizing multiblock copolymers containing blocks with exceptionally high local ion exchange capacity (IEC). Thus, a series of AEMs, based on poly(arylene ether sulfone)s, with IECs in the hydrophilic domain in the range between 4.9 and 5.8 meq./g has been produced. The high IEC was achieved by incorporating tri- and tetramethylhydroquinone into the polymer backbone, thus enabling the attachment of three and four ionic groups respectively on single aromatic rings. The structure− morphology− property relationships and the performance of these copolymers and AEMs will be presented.
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

SYMPOSIUM FA, Fuel Cells: Materials and technology challenges. Presentation FA:HP24. Part of the 13th senior edition of the International Conferences on Modern Materials and Technologies (CIMTEC 2014).

Subject classification (UKÄ)

  • Chemical Sciences

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