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@ARTICLE{Schalenbach:911469,
      author       = {Schalenbach, Maximilian and Hecker, Burkhard and Schmid,
                      Bernhard and Durmus, Yasin Emre and Tempel, Hermann and
                      Kungl, Hans and Eichel, Rüdiger-A.},
      title        = {{I}onic transport modeling for liquid electrolytes ‐
                      {E}xperimental evaluation by concentration gradients and
                      limited currents},
      journal      = {Electrochemical science advances},
      volume       = {3},
      number       = {2},
      issn         = {2698-5977},
      address      = {Weinheim},
      publisher    = {Wiley-VCH Verlag GmbH $\&$ Co KGaA},
      reportid     = {FZJ-2022-04740},
      pages        = {e2100189},
      year         = {2022},
      abstract     = {A direct current in an electrochemical cell with a diluted
                      liquid electrolyte leads to the displacement of ions within
                      the solvent, while diffusion works against the resulting
                      concentration differences. This study aims to experimentally
                      evaluate a physicochemical ion transport model (source code
                      provided) that describes current-driven concentration
                      gradients in diluted electrolytes. Hereto, an aqueous 0.1 M
                      CuSO4 electrolyte between metallic copper electrodes serves
                      as an experimental test system. Spatially resolved optical
                      measurements are used to monitor the evolution of the ion
                      concentration gradient in the electrolyte. Moreover,
                      measured limited currents are related to computationally
                      modeled concentration gradients. A constant parameterization
                      of the diffusion coefficient, molar conductivity and ion
                      transport number lead to a slight overestimation of the
                      cathodic ion depletion and cell resistance, whereas a
                      literature data based concentration dependent
                      parameterization matches better to the measured data. The
                      limited current is considered under a computational
                      parameter variation and thereby related to the
                      physicochemical impact of different electrolyte properties
                      on the ion transport. This approach highlights the
                      differences between purely diffusion limited currents and
                      the limited current resulting from the combined electric
                      field and diffusion driven ion motion. A qualitative
                      schematic sketch of the physical mechanisms of the ion
                      movement is presented to illustrate the current driven ion
                      displacement in liquid electrolytes.},
      cin          = {IEK-9},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {1232 - Power-based Fuels and Chemicals (POF4-123)},
      pid          = {G:(DE-HGF)POF4-1232},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001138657200006},
      doi          = {10.1002/elsa.202100189},
      url          = {https://juser.fz-juelich.de/record/911469},
}