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@INPROCEEDINGS{Hensen:1046550,
      author       = {Hensen, Laurin and Schalenbach, Maximilian and Tempel,
                      Hermann and Eichel, Rüdiger-A.},
      title        = {{M}easuring hydrogen diffusion, solubility, and
                      permeability of polymers},
      reportid     = {FZJ-2025-03860},
      year         = {2025},
      abstract     = {The rise of the hydrogen economy requires new materials for
                      the storage, separation and transportation of hydrogen.
                      Hereto, polymers display an outstanding role due to their
                      unique properties, including mechanical strength, thermal
                      stability and chemical resistance, while their permeability
                      to hydrogen is relevant for their applicability. However,
                      literature data on the hydrogen permeability (which is
                      determined by the product of solubility and diffusion) of
                      polymers are rare. To measure these physical properties,
                      this study advanced the electrochemical measurement of the
                      hydrogen transport dynamics and combines this high-quality
                      experimental data with fits of Fick's second law to describe
                      transient pressure variations. This technique is applied to
                      polyether ether ketone (PEEK), polypropylene (PP),
                      polyphenylene sulfide (PPS), and Polytetrafluoroethylene
                      (PTFE) within a temperature range of 30–80 °C. In the
                      permeation cell designed to measure hydrogen permeation, the
                      polymer is coated with a sputtered palladium layer, while
                      hydrogen is detected via electrochemical oxidation. To
                      measure the hydrogen permeation dynamics, the applied
                      hydrogen pressure is reduced instantly to atmospheric
                      pressure at time = 0s. Thus, the permeation current switches
                      from one equilibrium to another, while the dynamics of the
                      transition between these states is used to determine the
                      diffusion coefficient and the solubility of hydrogen. The
                      determined diffusion coefficients and solubilities are
                      analyzed as a function of temperature to determine
                      activation energies and enthalpies of solution.},
      month         = {Sep},
      date          = {2025-09-07},
      organization  = {76th Annual Meeting of the
                       International Society of
                       Electrochemistry, Mainz (Germany), 7
                       Sep 2025 - 12 Sep 2025},
      subtyp        = {Other},
      cin          = {IET-1},
      cid          = {I:(DE-Juel1)IET-1-20110218},
      pnm          = {1231 - Electrochemistry for Hydrogen (POF4-123) / iNEW2.0 -
                      Verbundvorhaben iNEW2.0: Im Zentrum des Inkubators
                      Nachhaltige Elektrochemische Wertschöpfungsketten (iNEW
                      2.0) steht die Erforschung und Entwicklung neuartiger und
                      leistungsfähiger Elektrolyse-verfahren zur Anwendung in
                      nachhaltigen Power-to-X (P2X) Wertschöpfungsketten.
                      (BMBF-03SF0627A) / HITEC - Helmholtz Interdisciplinary
                      Doctoral Training in Energy and Climate Research (HITEC)
                      (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF4-1231 / G:(DE-Juel1)BMBF-03SF0627A /
                      G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/1046550},
}