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@ARTICLE{Melchior:863683,
      author       = {Melchior, Jan-Patrick and Lohstroh, Wiebke and Zamponi,
                      Michaela and Jalarvo, Niina H.},
      title        = {{M}ultiscale water dynamics in model {A}nion {E}xchange
                      {M}embranes for {A}lkaline {M}embrane {F}uel {C}ells},
      journal      = {Journal of membrane science},
      volume       = {586},
      issn         = {0376-7388},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2019-03689},
      pages        = {240 - 247},
      year         = {2019},
      abstract     = {Ionic conductivity and water transport through alkaline
                      Anion Exchange Membranes (AEM) are key properties for
                      application in Alkaline Membrane Fuel Cells (AMFC),
                      Redox-Flow-Cells, or Alkaline Membrane Electrolysis. AEMs
                      consist of a polymer domain with cationic side groups and a
                      pervading water domain through which anions are conducted.
                      In this study, Quasielastic Neutron Scattering (QENS) is
                      employed to study water rotational and diffusive dynamics in
                      the hydroxide form of a model AEM (Fumatech FAA-3) at water
                      contents relevant for application. Two distinct diffusion
                      time- and length-scales are accessed: “Localized”
                      diffusion at the lower Ångstrom/tens of picosecond scale
                      and “extended” diffusion at the higher
                      Ångstrom/hundreds of picosecond scale. The localized
                      diffusion length scale is smaller than the membrane's water
                      domain thickness and its diffusion coefficients remain close
                      to the value of bulk water even at decreasing water content.
                      Extended diffusion approaches the thickness of the water
                      domain and its diffusion coefficients decrease strongly with
                      decreasing water content. A master curve links water domain
                      thickness to the extended water diffusion coefficients for
                      the alkaline hydrocarbon model AEM and literature data on
                      acidic per-fluorinated Proton Exchange Membranes.},
      cin          = {JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
      ddc          = {570},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)SPHERES-20140101 /
                      EXP:(DE-MLZ)TOF-TOF-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000471097100025},
      doi          = {10.1016/j.memsci.2019.05.079},
      url          = {https://juser.fz-juelich.de/record/863683},
}