10.26165/JUELICH-DATA/MLN4JX Froning, Dieter000000032264407X(Forschungszentrum Jülich GmbH, IEK-14: Electrochemical Process Engineering)Shi, Yan0000-0001-8294-4002(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 were applied to the PEFC, and the dynamic voltages were monitored. During the experiments shown in jump-run.zip, seven attributes of operating conditions were varied. The experimental setup is specified in detail by Shi [1]. The data files are according to section 5.1 in [1]. The data files in the path jump-run/ contain terms like 0.x-yy, where 0.x is the upper level of the load ramp, starting at 0.2 A cm-2, yy is a numbering of the set of operating conditions, listed in the file 'ramp-up-Experimental setup of DoE methode.pdf'. The parameters A to G are according to Table 5-1 in [1]. The files in the path ramp-up/ contain experiments operated under stepwise increasing electrical load as specified in the file 'jump-dynamic-Experimental setup of dynamic DoE methode.pdf'. The parameters A to G are according to Table 6-1 in [1]. Data with constant operating conditions and different ramp characteristics are published by Froning and et al. [2]. Froning, Dieter(Forschungszentrum Jülich GmbH, IEK-14: Electrochemical Process Engineering)