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@ARTICLE{Liu:845524,
      author       = {Liu, Shuai and Rasinski, Marcin and Lin, Yu and Wippermann,
                      Klaus and Everwand, Andreas and Lehnert, Werner},
      title        = {{E}ffects of {C}onstant {L}oad {O}perations on {P}latinum
                      {B}ands {F}ormation and {C}athode {D}egradation in
                      {H}igh-{T}emperature {P}olymer {E}lectrolyte {F}uel {C}ells},
      journal      = {Electrochimica acta},
      volume       = {289},
      issn         = {0013-4686},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2018-02758},
      pages        = {354 - 362},
      year         = {2018},
      abstract     = {In this paper, Pt bands and cathode degradation are
                      investigated in polybenzimidazole (PBI) membrane-based
                      high-temperature polymer electrolyte fuel cells (HT-PEFC). A
                      focused ion beam/scanning electron microscopy (FIB/SEM)
                      system was used to characterize the cross-section
                      morphologies of membrane electrode assemblies (MEA). A Pt
                      band is observed in the FIB/SEM images of the MEA activated
                      by a common break-in procedure (at 200 mA cm−2 for
                      70 h). Then, an identical MEA was subjected to an aging
                      process that included static holding at 200 mA cm−2
                      for 100 h and an open circuit voltage (OCV) operation for
                      another 100 h. FIB/SEM images of the aged MEA show that
                      the band formed during the break-in procedure is
                      strengthened. Moreover, a second Pt band is observed closer
                      to the membrane/cathode interface, which is due to the
                      increase of hydrogen crossover caused by membrane thinning
                      during the OCV hold test. In situ electrochemical
                      measurements show that the cell’s performance loss due to
                      the formation of the Pt band during cell operation at
                      200 mA cm−2 is negligible. The decrease of cell
                      performance is mainly attributed to the loss of
                      electrochemically active surface area and membrane
                      degradation during the OCV hold test.},
      cin          = {IEK-3},
      ddc          = {540},
      cid          = {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:000446234700037},
      doi          = {10.1016/j.electacta.2018.09.021},
      url          = {https://juser.fz-juelich.de/record/845524},
}