Journal
ENERGY
Volume 150, Issue -, Pages 69-76Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2018.02.134
Keywords
Polymer electrolyte membrane fuel cell; Catalyst layer; Pore size; Pore surface area; Fractal dimension
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Funding
- Ontario-China Research and Innovation Fund
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Automotive Partnership Canada (APC) through the Natural Sciences and Engineering Research Council of Canada (NSERC) [APCPJ 417858 - 11]
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Catalyst layer (CL) has a significant impact on the overall pore structure of the entire electrodes, thereby impacting the transport processes and the performance of polymer electrolyte membrane (PEM) fuel cells. In this study, the contribution of the CL to the entire electrode structure is experimentally investigated. The electrodes are prepared by using two types of catalysts with different platinum/carbon (Pt/C) ratios and Pt loadings and characterized by the method of standard porosimetry (MSP). The results show that for the same type of catalysts, as the Pt loading is increased, both the porosity and mean pore size of the electrode decrease, whereas the pore surface area increases. For a constant Pt loading, a lower Pt/C ratio results in a thicker electrode with a smaller porosity, smaller pore size, and larger pore surface area. The fractal dimension is found to be a good representative of the complexity of the pore structure of the electrode; a larger fractal dimension is detected for a higher Pt loading and a smaller Pt/C ratio. (C) 2018 Elsevier Ltd. All rights reserved.
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