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@INPROCEEDINGS{Borowec:1048727,
      author       = {Borowec, Julian and Rein, Lukas and Poc, Jean-Pierre and
                      Gorin, Nelli and Basak, Shibabrata and Dobrenizki, Ladislaus
                      and Schmid, Günter and Jodat, Eva and Karl, André and
                      Eichel, Rüdiger-A. and Hausen, Florian},
      title        = {{N}anomechanical and {N}anoelectrical {A}nalysis of
                      {P}roton {E}xchange {M}embrane {E}lectrolyzer {E}lectrodes},
      reportid     = {FZJ-2025-04849},
      year         = {2025},
      abstract     = {Understanding the aging process of proton exchange membrane
                      electrolyzer cells(PEMECs) is crucial for improving their
                      durability. To this end, a more than 5000 h
                      operatedweb-woven reinforced membrane electrode assembly
                      (MEA) was investigated usingnanoindentation and
                      nanomechanical and nanoelectrical atomic force microscopy
                      (AFM)techniques. Within this work, investigations on the MEA
                      anode are presented,[1] and areextended by analysis of the
                      MEA cathode for a more complete understanding of
                      electrodeaging.The web-woven reinforcement fibers locally
                      increase the nanomechanical properties andwere found to be a
                      suitable reinforcement for long-term operation. Strikingly,
                      a slightlydiminished electrically conductive surface area
                      was observed above reinforcement fiberintersections
                      highlighting a local fiber influence.While the cathode
                      slightly hardened and heterogenized, the surface ionomer
                      exhibited astable nature. To the contrary, significant anode
                      aging was observed, especially at poroustransport layer
                      (PTL) related marks. At these marks, an increased conductive
                      surface areawas shown by AFM, and a hardness increase was
                      shown by nanoindentation. These effectson the anode are
                      attributed to a loss of electrically conductive and soft
                      ionomer.This work enhances the understanding of electrode
                      aging focusing on the impact ofreinforcement fibers and
                      PTL.[1] Borowec, Julian, et al, J. Mater. Chem. A, 2025, 13,
                      6347-6356.},
      month         = {Jul},
      date          = {2025-07-01},
      organization  = {European Fuel Cell Forum 2025, Lucerne
                       (Switzerland), 1 Jul 2025 - 4 Jul 2025},
      subtyp        = {After Call},
      cin          = {IET-1 / IET-4},
      cid          = {I:(DE-Juel1)IET-1-20110218 / I:(DE-Juel1)IET-4-20191129},
      pnm          = {1231 - Electrochemistry for Hydrogen (POF4-123) / HITEC -
                      Helmholtz Interdisciplinary Doctoral Training in Energy and
                      Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF4-1231 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1048727},
}