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@ARTICLE{Korshunov:1019527,
      author       = {Korshunov, Aleksandr and Milner, Matthew James and
                      Grünebaum, Mariano and Studer, Armido and Winter, Martin
                      and Cekic-Laskovic, Isidora},
      title        = {{A}n oxo-verdazyl radical for a symmetrical nonaqueous
                      redox flow battery},
      journal      = {Journal of materials chemistry / A},
      volume       = {8},
      issn         = {2050-7488},
      address      = {London ˜[u.a.]œ},
      publisher    = {RSC},
      reportid     = {FZJ-2023-05474},
      pages        = {22280–22291},
      year         = {2020},
      abstract     = {Verdazyl free radical compounds are promising candidates
                      for symmetrical all-organic redox flow batteries(RFBs) due
                      to their redox stability, the ease with which their chemical
                      structure can be varied, and theirunique bipolar nature. The
                      present work reports a preliminary screening of a selection
                      of oxo-verdazylcompounds for key redox electrolyte
                      parameters. Of the considered candidates, the
                      1,5-diphenyl-3-isopropyl-6-oxo-verdazyl radical performed
                      best and is investigated in extensive RFB experiments
                      tocompare its electrochemical behavior in cyclic voltammetry
                      (CV) to that within an actual battery. Thesymmetrical
                      oxo-verdazyl non-aqueous electrolyte RFB provides a mean
                      voltage of 1.42 V anddemonstrates good stability as well as
                      high coulombic $(>97\%)$ and energy efficiencies over more
                      than100 charge/discharge cycles. The redox electrolyte is
                      characterized at different stages within a singlecycle
                      (‘state of charge’ experiments) independently for each
                      half-cell. To address the specifics of theelectrolyte
                      transition to RFB cell setup an ‘in-cell’ CV
                      flow-enabled electrochemical study has beenconducted,
                      introduced here as a new step towards standardization of the
                      electrochemical description ofRFB electrolytes. The
                      electrochemical performance results highlight oxo-verdazyls
                      as versatile materialsfor energy applications and indicate
                      great promise for their further development and optimization
                      in thefield of RFBs.},
      cin          = {IEK-12},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {1221 - Fundamentals and Materials (POF4-122) / SFB 858 B11
                      - Kooperativität in organischen spintragenden Materialien
                      und ihren Hybridsystemen: Steuerung magnetischer
                      Eigenschaften durch Orientierung von Radikalen (B11)
                      (159705466)},
      pid          = {G:(DE-HGF)POF4-1221 / G:(GEPRIS)159705466},
      typ          = {PUB:(DE-HGF)16},
      url          = {https://juser.fz-juelich.de/record/1019527},
}