Publications Repository - Gdańsk University of Technology

This article discusses the application of impedance analysis for diagnosing the cathode of a direct methanol fuel cell at various operating temperatures. The Dynamic Electrochemical Impedance Spectroscopy technique coupled with a linear current scan was applied for this purpose. This technique allowed the observation of changes in the cathode's properties in the fuel cell operating under real working conditions. An equivalent model based on the thin-film flooded agglomerate model describing the cathode's behavior was presented, and changes in its parameters were compared with current load and different temperatures. Polarization resistance of the active site and carbon support was obtained. Changes in the slope of the resistance curves with increasing load have been observed, which can suggest the change in the electrode process. Differences in slopes depending on temperature were also recorded.

Authors

• dr inż. Łukasz Gaweł link open in new tab ,
• Dominika Parasińska link open in new tab