Fully aromatic block copolymers for fuel cell membranes with densely sulfonated nanophase domains

Shogo Takamuku, Patric Jannasch

Research output: Contribution to journalArticlepeer-review

25 Citations (SciVal)

Abstract

Two multiblock copoly(arylene ether sulfone)s with similar block lengths and ion exchange capacities (IECs) were prepared by a coupling reaction between a non-sulfonated precursor block and a highly sulfonated precursor block containing either fully disulfonated diarylsulfone or fully tetrasulfonated tetraaryldisulfone segments. The latter two precursor blocks were sulfonated via lithiation-sulfination reactions whereby the sulfonic acid groups were exclusively placed in ortho positions to the many sulfone bridges, giving these blocks IECs of 4.1 and 4.6 meq·g−1, respectively. Copolymer membranes with IECs of 1.4 meq·g−1 displayed well-connected hydrophilic nanophase domains and had decomposition temperatures at, or above, 300 °C under air. The copolymer with the tetrasulfonated tetraaryldisulfone segments showed a proton conductivity of 0.13 S·cm−1 at 80 °C under fully humidified conditions, and surpassed that of a perfluorosulfonic acid membrane (NRE212) by a factor of 5 at –20 °C over time.
Original languageEnglish
Pages (from-to)474-480
JournalMacromolecular Rapid Communications
Volume32
Issue number5
DOIs
Publication statusPublished - 2011

Bibliographical note

First published online on 29 Dec. 2010



The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)

Subject classification (UKÄ)

  • Chemical Sciences

Keywords

  • polymer electrolyte fuel cell membranes
  • sulfonations
  • amphiphilic block copolymers
  • ionomers
  • polycondensation

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