Characterization of PEM fuel cell degradation by polarization change curves (CROSBI ID 219230)
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Podaci o odgovornosti
Bezmalinović, Dario ; Šimić, Boris ; Barbir, Frano
engleski
Characterization of PEM fuel cell degradation by polarization change curves
Polarization change curves, defined as a difference between the polarization curve at the beginning of life and the actual polarization curve after the cell has been operational for some time, were used to analyze degradation of a PEM fuel cell exposed to voltage cycling as an accelerated stress test for electrocatalyst degradation. Degradation, i.e., loss of voltage was due to increase of activation losses and increase of resistance in the catalyst layer, both most likely due to the loss of catalyst electrochemically active area. The results of the polarization change curves analysis correspond to the findings of the periodic individual tests performed during the accelerated stress test, such as electrochemical impedance spectroscopy, cyclic voltammetry and linear sweep voltammetry. Therefore, this method has potential to be used as a relatively quick and simple, yet effective, degradation diagnostic tool.
Catalyst degradation; ECSA loss; Diagnostics; Activation losses; Resistive losse
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nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
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Podaci o izdanju
Povezanost rada
Kemijsko inženjerstvo, Strojarstvo