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- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received January 18, 2023
Revised March 1, 2023
Accepted March 10, 2023
- Acknowledgements
- This work was supported by the Technology Innovation Program (20011633) funded By the Ministry of Trade, Industry & Energy (MOTIE, Korea)
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Acceleration of electrolyte membrane degradation by frequent activation in PEMFC electrochemical durability evaluation
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Abstract
During the durability tests for PEMFC membranes, performance characterization is conducted to determine the degree of degradation, the interval for which is different for each durability test protocol. Before performance
characterization, activation is carried out to determine the reliability. Most activations are accompanied by voltage
changes, which can lead to electrode degradation. However, this has largely been neglected because the activation time
is shorter than the durability test time. In this study, activation was conducted at 24, 48, and 144 h intervals, during the
membrane durability test of a PEMFC, and the effect of activation on the degradation of the membrane and electrode
was investigated. For a shorter activation interval during the durability test, the lifetime of the membrane was reduced
by up to 35%. For the same durability test time, more activations led to greater electrode and membrane degradation.
Through scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM-EDS) analysis, it was found that
for a shorter activation interval, more Pt was deposited into the membrane and then the membrane was thinner.
During the durability test, frequent activation accelerated membrane and electrode degradation.
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