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@ARTICLE{Fricke:1043178,
      author       = {Fricke, Sebastian and Kortekaas, Luuk and Winter, Martin
                      and Grünebaum, Mariano},
      title        = {{I}ntroducing an {E}xperimental {R}oute to {I}dentify and
                      {U}nify {L}ab‐{S}cale {R}edox‐{F}low {B}attery {C}ell
                      {P}erformances via {M}olar {F}luxes and {C}ell {C}onstants},
      journal      = {Small Methods},
      volume       = {2401670},
      issn         = {2366-9608},
      address      = {Weinheim},
      publisher    = {WILEY-VCH Verlag GmbH $\&$ Co. KGaA},
      reportid     = {FZJ-2025-02786},
      pages        = {2401670},
      year         = {2025},
      note         = {This research was funded by the German Federal Ministry of
                      Education and Research and by the Ministry of Arts and
                      Science of the state of North Rhine-Westphalia in the
                      framework of the core funding for Jülich Research Centre.},
      abstract     = {Redox flow batteries (RFBs) are a promising technology for
                      grid energy storage based on their high potential for
                      scalability, design flexibility, high efficiency, and long
                      durability, hence great effort has been invested in this
                      area of research. However, due to the large differences in
                      lab-scale RFB cell design and construction as well their
                      operational performance, fundamental studies on innovative
                      RFB components (e.g., active materials, separators,
                      additives) compare poorly due to the lack of standard
                      setups, settings, and procedures. This work introduces an
                      experimental calibration route for aqueous as well as
                      nonaqueous RFBs based on a simple mass transport model using
                      molar fluxes, enabling one to compare dissimilar lab-scale
                      RFB cell setups by introducing several RFB parameters:
                      First, K1, which summarizes the operating parameters of an
                      RFB to identify the critical ratio (K1critical) needed for
                      efficient charge–discharge cycling using a simple
                      overvoltage and charge efficiency evaluation; second, the
                      RFB cell constant ζ, quantifying the influence of a
                      lab-scale RFB setup on its performance; and finally, K2,
                      ultimately enabling full comparison of (idealized)
                      K1critical operating parameters across RFB cell setups.},
      cin          = {IMD-4},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IMD-4-20141217},
      pnm          = {1221 - Fundamentals and Materials (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1221},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {40434187},
      UT           = {WOS:001497383200001},
      doi          = {10.1002/smtd.202401670},
      url          = {https://juser.fz-juelich.de/record/1043178},
}