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@ARTICLE{Schalenbach:904179,
      author       = {Schalenbach, Maximilian and Durmus, Yassin Emre and Tempel,
                      Hermann and Kungl, Hans and Eichel, Rüdiger-A.},
      title        = {{D}ouble layer capacitances analysed with impedance
                      spectroscopy and cyclic voltammetry: validity and limits of
                      the constant phase element parameterization},
      journal      = {Physical chemistry, chemical physics},
      volume       = {23},
      number       = {37},
      issn         = {1463-9076},
      address      = {Cambridge},
      publisher    = {RSC Publ.},
      reportid     = {FZJ-2021-05749},
      pages        = {21097 - 21105},
      year         = {2021},
      abstract     = {Routinely, cyclic voltammetry (CV) or electrochemical
                      impedance spectroscopy (EIS) are used in electrochemistry to
                      probe the current response of a specimen. For the
                      interpretation of the response, constant phase elements
                      (CPEs) are used in the frequency domain based impedance
                      calculus to parameterize the double layer. In this study,
                      the double layer responses to the two measurement techniques
                      are compared by probing a model-type polished gold electrode
                      under potential and amplitude variation. The equivalent
                      circuit that describes the double layer includes a CPE and
                      is parameterized by impedance data, while a computational
                      impedance-based Fourier transform model (source code
                      disclosed) is used to describe the CV response. With CV, the
                      measured and modelled responses show good agreement at
                      amplitudes below 0.2 V and within a certain scan rate
                      window. At larger amplitudes, the ion arrangement in the
                      double layer is actively changed by the measurement, leading
                      to potential dependencies and deviations from the CPE
                      behaviour. These varying contributions to the impedance
                      measurements are not respected in the impedance calculus
                      that relies on a sinusoidal response. The transition from
                      perturbations of the double layer equilibrium to distortions
                      of the ion arrangements is analysed with both measurement
                      methods.},
      cin          = {IEK-9},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {1223 - Batteries in Application (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1223},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:34523643},
      UT           = {WOS:000695965100001},
      doi          = {10.1039/D1CP03381F},
      url          = {https://juser.fz-juelich.de/record/904179},
}