18 research outputs found
Theoretical considerations on fuel cell electrodes design for in operando transmission X-ray absorption spectroscopy of the cell cathode
No full textUnderstanding Catalyst Layer Degradation in PEM Fuel Cell Through Polarization Curve Fitting
No full textA Comprehensive Physical Impedance Model of Polymer Electrolyte Fuel Cell Cathodes in Oxygen-free Atmosphere
No full textPreparation of PtRu/WO3–C by intermittent microwave method with enhanced catalytic activity of methanol oxidation
No full textImpedance Measurement and Selection of Electrochemical Equivalent Circuit of a Working PEM Fuel Cell Cathode
No full textStochastic Analysis of the Gas Flow at the Gas Diffusion Layer/Electrode Interface of a High-Temperature Polymer Electrolyte Fuel Cell
No full textGuided cracking of electrodes by stretching prism-patterned membrane electrode assemblies for high-performance fuel cells
Get PDFAbstract Guided cracks were successfully generated in an electrode using the concentrated surface stress of a prism-patterned Nafion membrane. An electrode with guided cracks was formed by stretching the catalyst-coated Nafion membrane. The morphological features of the stretched membrane electrode assembly (MEA) were investigated with respect to variation in the prism pattern dimension (prism pitches of 20 μm and 50 μm) and applied strain (S ≈ 0.5 and 1.0). The behaviour of water on the surface of the cracked electrode was examined using environmental scanning electron microscopy. Guided cracks in the electrode layer were shown to be efficient water reservoirs and liquid water passages. The MEAs with and without guided cracks were incorporated into fuel cells, and electrochemical measurements were conducted. As expected, all MEAs with guided cracks exhibited better performance than conventional MEAs, mainly because of the improved water transport
Modeling of the solid oxide fuel cell anode based on a new analytical model using nonlinear Butler-Volmer expression
No full textEffect of Nitrogen Doping and Temperature on Mechanical Durability of Silicon Carbide Thin Films
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