Study of the influence of key test parameters on the performance of a PEMFC stack

An approach for testing methods is described with the aim to determine the influence of different parameters on the performance of a low temperature PEMFC stack. Changes of the parameters were the stack temperature, the anode and cathode stoichiometry and the anode and cathode humidity, which have, besides the gas pressures, a major impact on the stack performance. The stack performance was evaluated using the variation at different electrical load values. Additionally, two polarization curves at different parameter settings were performed.