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Issue 8, 2017
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In situ construction of interconnected ion transfer channels in anion-exchange membranes for fuel cell application

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Abstract

To resolve the trade-off between conductivity and stability in anion-exchange membranes (AEMs), we proposed a strategy to modulate the membrane morphology from isolated ionic clusters to interconnected channels by precise adjustment of the amphiphilic architectures. From the perspective of AEM molecular designing, by synchronously increasing the amphiphilic segments, well-connected conductive nano-channels, comprising overlapped larger hydrophilic domains (35–40 nm), were constructed and validated by percolation theory. The whole synthesis process was green, avoiding the toxic chloromethyl methyl ether route. The unique molecular, spatial and micro-structures enabled the membranes to exhibit excellent performance. The connective hydrophilic channels significantly enhanced the conductivity, while the increasing hydrophobicity reduced the water uptake and swelling, improving the dimensional and chemical stability of the membranes. This strategy successfully solves the trade-off issue between conductivity and stability in AEMs.

Graphical abstract: In situ construction of interconnected ion transfer channels in anion-exchange membranes for fuel cell application

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Supplementary files

Article information


Submitted
26 Oct 2016
Accepted
12 Jan 2017
First published
19 Jan 2017

J. Mater. Chem. A, 2017,5, 4003-4010
Article type
Paper

In situ construction of interconnected ion transfer channels in anion-exchange membranes for fuel cell application

J. Si, H. Wang, S. Lu, X. Xu, S. Peng and Y. Xiang, J. Mater. Chem. A, 2017, 5, 4003
DOI: 10.1039/C6TA09277B

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