Anion Exchange Membranes: Enhancement by Addition of Unfunctionalized Triptycene Poly(Ether Sulfone)s
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Swager_Anion exchange.pdf
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Author(s)
Moh, Lionel C.H.
Kim, Yoonseob
Swager, Timothy M
Date Issued
December 2017
Journal
ACS Applied Materials & Interfaces
Publisher
American Chemical Society (ACS)
Citation
Kim, Yoonseob et al. “Anion Exchange Membranes: Enhancement by Addition of Unfunctionalized Triptycene Poly(Ether Sulfone)s.” ACS Applied Materials & Interfaces 9, 49 (December 2017): 42409–42414 © 2017 American Chemical Society
Version
Author's final manuscript
Abstract
Anion exchange membrane fuel cells are a clean and efficient promising future energy source. However, the development of stable high-performance membranes remains a major challenge. Herein we demonstrate that the addition of unfunctionalized triptycene poly(ether sulfones) into 1-methylimidazolium poly(ether sulfone) enhances membrane's conductivity (up to 0.082 S/cm at 80 °C), minimizes dimensional changes over temperatures from 20 to 80 °C, and enhances stability with 30% of the initial conductivity maintained after 450 h. These enhancements appear to be the result of nanophase separation and internal free volume. Small angle X-ray scattering and transmission electron microscopy reveal that the internal domain size increases (up to 7.44 nm) with increasing triptycene fraction. Keywords: anion exchange membrane; hydroxide conductivity; mechanical property; phase separation; triptycene copolymer
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1021/ACSAMI.7B13058
