Replication Data for: Cross-plane iridium-based filaments sap efficiency in Proton Exchange Membrane Electrolyzershttps://doi.org/10.26165/JUELICH-DATA/IMZWZMHeume, ChristineJaved, AliKaryofylli, VioletaDzieciol, KrzysztofBasak, ShibabrataPoc, Jean-PierreTasdemir, YaseminRutsch, YannikRein, LukasWolf, NiklasSpeer, SebastianJovanovic, SvenTreutlein, LeanderBorowec, JulianHausen, FlorianDobrenizki, LadislausMalmberg, StephanGranwehr, JosefKungl, HansJodat, EvaGeskes, PeterKarl, AndréSchmid, GünterEichel, Rüdiger-A,Jülich DATA2026-01-222026-01-22T14:13:21ZThis repository contains the primary datasets associated with the publication <b>“Cross-plane iridium-based filaments sap efficiency in Proton Exchange Membrane Electrolyzers” (DOI: https://doi.org/10.1016/j.joule.2025.102238)</b>. It provides raw and processed data as used in the publication, organized into sub-folders by measurement technique. Each dataset folder includes its own README.txt file describing file formats and instructions for data handling.<p><p> The data were collected to investigate an aging phenomenon in PEM electrolysis cell MEAs involving the growth of cross-plane iridium filaments within the membrane, correlated with the porous transport layer design. The aim of the study is to improve efficiency, durability, and large-scale green hydrogen production.<p><p> Folder contents (switch to "tree" view to see the folders):<p> - <b>README.txt</b>: Please read the README.txt file within this folder first. It contains more detailed information of the contents in each sub folder.<p> - <b>Atomic_Force_Microscopy</b>: AFM data. Please read the READM.txt file within this folder for more information.<p> - <b>Computational_Model</b>: Computational model data. Please read the READM.txt file within this folder for more information.<p> - <b>Electrochemical_Impedance_Spectroscopy</b>: Electrochemical impedance data. Please read the READM.txt file within this folder for more information.<p> - <b>Hydrogen_Permeability</b>: Hydrogen permeability data. Please read the READM.txt file within this folder for more information.<p> - <b>Polarization_Curves</b>: Polarization curve data. Please read the READM.txt file within this folder for more information.<p> - <b>Raman_Spectroscopy</b>: Raman spetroscopy data. Please read the READM.txt file within this folder for more information.<p> - <b>SEM_EDS_TEM</b>: SEM, EDS and TEM data. Please read the READM.txt file within this folder for more information.<p>ChemistryComputer and Information ScienceEngineeringPhysicsHeume, Christine, et al. "Cross-plane iridium-based filaments sap efficiency in Proton Exchange Membrane Electrolyzers." Joule 10 (2026): 102238., doi, https://doi.org/10.1016/j.joule.2025.102238Heume, ChristineHeume, ChristineHeume, ChristineEichel, Rüdiger-A.2024-08-27CCBY