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@ARTICLE{Liu:890413,
      author       = {Liu, Shuai and Wippermann, Klaus and Lehnert, Werner},
      title        = {{M}echanism of action of polytetrafluoroethylene binder on
                      the performance and durability of high-temperature polymer
                      electrolyte fuel cells},
      journal      = {International journal of hydrogen energy},
      volume       = {46},
      number       = {27},
      issn         = {0360-3199},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2021-00937},
      pages        = {14687-14698},
      year         = {2021},
      abstract     = {In this work, new insights into impacts of the
                      polytetrafluoroethylene (PTFE) binder on high temperature
                      polymer electrolyte fuel cells (HT-PEFCs) are provided by
                      means of various characterizations and accelerated stress
                      tests. Cathodes with PTFE contents from 0 $wt\%$ to 60
                      $wt\%$ were fabricated and compared using electrochemical
                      measurements. The results indicate that the cell with 10
                      $wt\%$ PTFE in the cathode catalyst layer (CCL) shows the
                      best performance due to having the lowest mass transport
                      resistance and cathode protonic resistance. Moreover, cyclic
                      voltammograms show that Pt (100) edge and corner sites are
                      significantly covered by PTFE and phosphate anions when the
                      PTFE content is higher than 25 $wt\%.$ Open-circuit and low
                      load-cycling conditions are applied to accelerate
                      degradation processes of the HT-PEFCs. The PTFE binder shows
                      a network structure in the pores of the catalyst layer,
                      which reduces phosphoric acid leaching during the aging
                      tests. In addition, the high binder HT-PEFCs more easily
                      suffer from a mass transport problem, leading to more severe
                      performance degradation.},
      cin          = {IEK-14},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-14-20191129},
      pnm          = {135 - Fuel Cells (POF3-135) / 1231 - Electrochemistry for
                      Hydrogen (POF4-123)},
      pid          = {G:(DE-HGF)POF3-135 / G:(DE-HGF)POF4-1231},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000639330400008},
      doi          = {10.1016/j.ijhydene.2021.01.192},
      url          = {https://juser.fz-juelich.de/record/890413},
}