Abstract
The relationship between micro structures of the GDL/MPL and mass transport property was investigated through coupled visualization and numerical analyses. The electron transport resistance of the GDL was high with the increase in compression pressure, while the oxygen transport resistance was almost unchanged. The GDL structure obtained by micro X-ray computed tomography showed the decrease in large pores as well as porosity under compression. The random walk simulation based on the obtained GDL image suggested that the increase in the number of contact points between carbon fibers contributed to the reduction of electron transport resistance. In addition to GDL, the MPL structure was reconstructed by nano X-ray computed tomography. The porosity distribution was similar in all directions, indicating that the MPL had isotropic structure. These analyses revealed that the understanding of the transport properties based on more realistic structure is essential to provide the refined insights for improving cell performance.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
