Carbon corrosion behaviors and the mechanical properties of proton exchange membrane fuel cell cathode catalyst layer |
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| Affiliation: | 1. Department of Automotive Engineering, School of Transportation Science and Engineering, Beihang University, Beijing, 100191, China;2. Vehicle Energy & Safety Laboratory (VESL), Beihang University, Beijing, 100191, China;3. Department of Mechanical Engineering and Engineering Science, The University of North Carolina at Charlotte, Charlotte, NC, 28223, United States;4. North Carolina Motorsports and Automotive Research Center, The University of North Carolina at Charlotte, Charlotte, NC, 28223, United States;1. State Key Laboratory of Engines, Tianjin University, 135 Yaguan Road, Tianjin 300350, China;2. 20/20 Laboratory for Fuel Cell and Green Energy RD&D, Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo ON N2L 3G1, Canada;1. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia;2. Novosibirsk State University, Novosibirsk, 630090 Russia;3. Research and Education Center for Energy-Efficient Catalysis, Novosibirsk State University, Novosibirsk, 630090 Russia;1. Chemical Resources Laboratory, Tokyo Institute of Technology, R1-17, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan;2. Faculty of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan;3. FC-EV Research Division, Japan Automobile Research Institute, 2530 Karima, Tsukuba, Ibaraki, 305-0822, Japan;4. Chair of Technical Electrochemistry, Technical University of Munich, Lichtenbergstraße 4, 85748, Garching, Germany;1. Fuel Cell Research Lab (FCReL), School of Mechatronic Systems Engineering, Simon Fraser University, 250-13450 102 Avenue, Surrey, BC, V3T 0A3, Canada;2. Ballard Power Systems, 9000 Glenlyon Parkway, Burnaby, BC, V5J 5J8, Canada |
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| Abstract: | Carbon corrosion-induced catalyst layer destruction is the primary reason to the performance decay of proton exchange membrane fuel cells (PEMFCs). In this study, the accelerated stress test (AST) on carbon corrosion was conducted, and real-time CO2 evolution was measured in-situ by non-dispersive infrared (NDIR) analysis. The performance degradation was investigated by the reduction of the current density and the loss of electrochemical active surface area (ECSA) of Pt. The loss of catalyst layer porosity and increase of mass transport resistance were investigated by the visible reduction of porosity and thickness in the cathode catalyst layer (CCL). Further mechanical tensile tests showed that the elastic modulus of CCL remained unchanged initially, and then increased probably due to the compaction of CCL. In the final step, it decreased due to the complete failure of the material. Thus, carbon corrosion was proved to alter the mechanical strength of CCL. |
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| Keywords: | PEMFCs Cathode catalyst layer Carbon corrosion Accelerated stress test Mechanical stress |
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