The experimental measurement of local and bulk oxygen transport resistances in the catalyst layer of proton exchange membrane fuel cells. The impact of platinum loading on oxygen transport resistance. Humidity and temperature dependences of oxygen transport resistance of Nafion thin film on platinum electrode.
Analysis and modeling of PEMFC degradation: Effect on oxygen transport. Unexplained transport resistances for low-loaded fuel-cell catalyst layers.
Mass transport in gasdiffusion electrodes: A diagnostic tool for fuel-cell cathodes. Exploration of significant influences of the operating conditions on the local O 2 transport in proton exchange membrane fuel cells (PEMFCs). Modeling of high-efficient direct methanol fuel cells with order-structured catalyst layer. Oxygen transport resistance correlated to liquid water saturation in the gas diffusion layer of PEM fuel cells. Understanding mass and charge transports to create anion-ionomer-free high-performance alkaline direct formate fuel cells. Insight into the effect of pore-forming on oxygen transport behavior in ultra-low Pt PEMFCs. Transport resistances in fuel-cell catalyst layers. The priority and challenge of highpower performance of low-platinum proton-exchange membrane fuel cells. Impedance and resistivity of low-Pt cathode in a PEM fuel cell. Multi-Year Research, Development, and Demonstration Plan: 2016 FUEL CELLS SECTION. ElectroCat: DOE’s approach to PGM-free catalyst and electrode R&D. Engineering catalyst layers for next-generation polymer electrolyte fuel cells: A review of design, materials, and methods. Designing the next generation of proton-exchange membrane fuel cells. Finally, it is found that the loss of carbon and PTFE in GDLs lead to a higher hydrophilicity, which is related to an occurrence of water flooding and increase in the oxygen transport resistance. Both cation contamination and chemical decomposition will change the structure of ionomer, thus worsening the local oxygen transport. It is also noted that problems concerning oxygen transport caused by the degradation of ionomer chemical structure in CCLs should not be ignored. Considering the catalyst degradation, an eventual decrease in electrochemical active surface area (ECSA) definitely increases the local oxygen transport resistance since a decrease in active sites will lead to a longer oxygen transport path. It is analyzed that carbon corrosion in CCLs will result in pore structure destruction and impact ionomer distribution, thus affecting both the bulk and local oxygen transport behavior. In this review, influences of the degradation of key materials in membrane electrode assemblies (MEAs) on oxygen transport resistance in both cathode catalyst layers (CCLs) and gas diffusion layers (GDLs) are comprehensively explored, including carbon support, electrocatalyst, ionomer in CCLs as well as carbon material and hydrophobic polytetrafluoroethylene (PTFE) in GDLs. However, compared to effects of material degradation on apparent activity loss, little attention has been paid to influences on the phenomena of mass transport. A large-scale industrial application of proton exchange membrane fuel cells (PEMFCs) greatly depends on both substantial cost reduction and continuous durability enhancement.
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