Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Evaluation of water states in thin proton exchange membrane manufacturing using terahertz time-domain spectroscopy
AU - Alves-Lima, D.F.
AU - Li, X.
AU - Coulson, B.
AU - Nesling, E.
AU - Ludlam, G.A.H.
AU - Degl’Innocenti, R.
AU - Dawson, R.
AU - Peruffo, M.
AU - Lin, H.
PY - 2022/4/5
Y1 - 2022/4/5
N2 - 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.
AB - 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.
KW - Proton exchange membranes
KW - Membrane hydration
KW - Terahertz spectroscopy
KW - Water states
KW - Heat treatment
U2 - 10.1016/j.memsci.2022.120329
DO - 10.1016/j.memsci.2022.120329
M3 - Journal article
VL - 647
JO - Journal of Membrane Science
JF - Journal of Membrane Science
SN - 0376-7388
M1 - 120329
ER -