10.26165/JUELICH-DATA/CBVOJL Froning, Dieter000000032264407X(Forschungszentrum Jülich GmbH, IEK-14: Electrochemical Process Engineering)Zou, Wei(Forschungszentrum Jülich GmbH, IEK-14: Electrochemical Process Engineering)Janßen, Holger0000-0002-9964-7503(Forschungszentrum Jülich GmbH, IEK-14: Electrochemical Process Engineering)Lehnert, Werner0000-0002-7423-872X(Forschungszentrum Jülich GmbH, IEK-14: Electrochemical Process Engineering) Jülich DATA 2024 A lab scale polymer electrolyte fuel cell (PEFC) with a power of 9 W and an active area of 17.64 cm² was operated with 90% humidity and a stoichiometry factor of two in galvanostatic mode. Load cycles with different parameters of the load ramps were applied to the PEFC, and the dynamic voltages were monitored. The experimental setup is specified in detail by Zou et al. [1] and Zou [2], e. g., in Table 5-1 in [2]. Ramp value and ramp time of the load changes were changed. As an example, the data labeled A1B1 in the table 1 Ramp_parameters.csv is visualized in Figure 5-2 a) in [2]. Different operating conditions were applied, leading to the data shown by Froning et al. [3]. Froning, Dieter(Forschungszentrum Jülich GmbH, IEK-14: Electrochemical Process Engineering)