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@ARTICLE{Reshetenko:875448,
      author       = {Reshetenko, Tatyana and Randolf, Günter and Odgaard,
                      Madeleine and Zulevi, Barr and Serov, Alexey and Kulikovsky,
                      Andrei},
      title        = {{T}he {E}ffect of {P}roton {C}onductivity of
                      {F}e–{N}–{C}–{B}ased {C}athode on {PEM} {F}uel cell
                      {P}erformance},
      journal      = {Journal of the Electrochemical Society},
      volume       = {167},
      number       = {8},
      issn         = {1945-7111},
      address      = {Pennington, NJ},
      publisher    = {Electrochemical Soc.},
      reportid     = {FZJ-2020-02043},
      pages        = {084501 -},
      year         = {2020},
      abstract     = {A model–based impedance spectroscopy is used to determine
                      proton conductivity, oxygen transport parameter, double
                      layer capacitance and oxygen reduction reaction (ORR) Tafel
                      slope in the Fe–N–C cathode catalyst layer (CCL) of a
                      PEM fuel cell. Experimental spectra of two cells differing
                      by the membrane thickness only are processed using a
                      physics–based model for PEMFC impedance. The spectra have
                      been measured in the range of current densities from 25 to
                      800 mA cm−2. The ORR Tafel slope of both the cells shows
                      almost linear growth with the current density. In one of the
                      cells, the CCL proton conductivity σ p strongly decays at
                      the current density of 100 mA cm−2; this decay is
                      accompanied by the step growth of the double layer
                      capacitance. Other minor variations of proton conductivity
                      and double layer capacitance with the cell current occur
                      also in a counterphase; presumed origin of this effect is
                      discussed. The oxygen diffusion coefficient in the cathode
                      exhibits explosive growth with the cell current. We
                      attribute this effect to formation of temperature and
                      pressure gradients in the CCL due to strongly non–uniform
                      distribution of ORR rate in the electrode},
      cin          = {IEK-14 / IEK-3},
      ddc          = {660},
      cid          = {I:(DE-Juel1)IEK-14-20191129 / I:(DE-Juel1)IEK-3-20101013},
      pnm          = {135 - Fuel Cells (POF3-135)},
      pid          = {G:(DE-HGF)POF3-135},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000527234100001},
      doi          = {10.1149/1945-7111/ab8825},
      url          = {https://juser.fz-juelich.de/record/875448},
}