Evaluation of water states in thin proton exchange membrane manufacturing using terahertz time-domain spectroscopy

Alves-Lima, D.F. and Li, X. and Coulson, B. and Nesling, E. and Ludlam, G.A.H. and Degl’Innocenti, R. and Dawson, R. and Peruffo, M. and Lin, H. (2022) Evaluation of water states in thin proton exchange membrane manufacturing using terahertz time-domain spectroscopy. Journal of Membrane Science, 647. ISSN 0376-7388

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Abstract

Perfluorinated sulfonic-acid ionomers are the most common proton exchange membrane material whose structure underpins their unique water and chemical/mechanical stability properties. Understanding this performance-stability trade-offs is therefore vital for realising optimal membranes. Terahertz time-domain spectroscopy has been demonstrated to resolve molecular water states and retention properties inside thick Nafion membranes. By developing a parametric-based algorithm for data analysis, we demonstrate the broad applicability of this technique to industrially relevant thin ionomers (13–70 μm) prepared under various processing conditions where results are supported by conventional gravimetric analysis and prior demonstrations. Using this technique therefore opens up opportunities for rapid future parameter space investigation for membrane optimisation.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Membrane Science
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1600/1606
Subjects:
ID Code:
166965
Deposited By:
Deposited On:
08 Mar 2022 16:40
Refereed?:
Yes
Published?:
Published
Last Modified:
04 May 2022 02:47