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Showing 1 to 20 of 55 for “"Polymer Electrolyte Membrane"”.
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Condition monitoring of polymer electrolyte membrane fuel cells
… and under development, the Proton Exchange Membrane or Polymer Electrolyte Membrane (PEM) fuel cell has emerged as the technology of choice, and currently owns more than 80% of the commercial fuel cell market. This has spurred further research in the field to increase performance and life …
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Transients in Polymer Electrolyte Membrane (PEM) Fuel Cells
… applications has presented proton exchange membrane (PEM) fuel cells as a potential energy source. The use of PEM fuel cells for automotive and other transient applications, where there are rapid changes in load, presents a need for better understanding of transient behavior. In particular …
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Comparative analysis of Polymer Electrolyte Membrane (PEM) fuel cells
… out as the preferable ionomers for making the Polymer Electrolyte Membrane Fuel Cells (PEMFC) membranes owing to their extensive intrinsic chemical stability and super sulfonic acid strength which is core to the PEMFC proton conductivity. This thesis presents a deeper analysis into these PFSA …
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Carbon nanotube supported electrocatalysts for polymer electrolyte membrane fuel cells
… aimed at a study of novel electrocatalysts for polymer electrolyte membrane (PEM) fuel cells. Carbon nanotubes have been studied as a new catalyst support. A sonochemical treatment method was applied for surface oxidation of multiwalled carbon nanotubes to achieve highly dispersed nanoparticles …
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Dynamic subdivided relative humidity model of a polymer electrolyte membrane fuel cell
… dynamic relative humidity model for a polymer electrolyte membrane (PEM) fuel cell stack is presented. This model is integrated with a first law based thermal model, which tracks energy flow within four defined control volumes in the fuel cell; the cathode channel, anode channel, …
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Impedance spectroscopy techniques for condition monitoring of polymer electrolyte membrane fuel cells
Energy continues to remain the spine of all human development. As we continue to make advances in various levels, the need for energy in quantity, and even more recently, quality, continues to increase. The fuel cell presents itself as a promising prospect to solve one of mankind’s current …
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MULTISCALE COMPUTATIONAL MODELING OF NANOSTRUCTURE AND TRANSPORT IN POLYMER ELECTROLYTE MEMBRANE FUEL CELLS
Polymer electrolyte membrane fuel cells (PEMFCs) are predicted to revolutionize energy conversion for transportation due to a multitude of advantages over conventional methods. However, due to their lack of resillience to adverse conditions, they are not as widespread as other portable energy …
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Low PGM PtCo alloy catalysts for low loading Polymer Electrolyte Membrane Fuel Cells
Polymer Electrolyte Membrane Fuel Cells (PEMFCs) are a promising means of generating clean energy in especially transportation applications. The electrochemical conversion of energy is driven within membrane electrode assemblies (MEAs) over costly Pt catalyst which limits PEMFC cost viability. PtCo …
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Three-dimensional mathematical model of a high temperature polymer electrolyte membrane fuel cell
Polymer electrolyte fuel cells are regarded as one of the most promising alternatives to the depleting and high pollutant fossil fuel energy sources. High temperature Polymer electrolyte fuel cells are especially suitable for stationary power applications. However, the length scale of a PEM fuel …
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Reference Electrode Development in Polymer Electrolyte Membrane (PEM) Electrolyzer Assembly for Novel Investigation of Electrodes
Polymer electrolyte membrane electrolyzers (PEMEs) are the key to integrating renewable energy generation with energy storage to reduce greenhouse gas emissions that contribute to global climate change. The commercialization of large PEME systems, however, requires improvements to electrode design, …
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Surface chemistry properties of high nitrogen stainless steels in a polymer electrolyte membrane fuel cell environment
Includes bibliographical references (pages 143-151).
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Cross linked sulphonated poly (ether ether ketone) for the development of polymer electrolyte membrane fuel cell
… for long term applications as fuel cell membranes. Analysis of the dielectric response by Cole-Cole, Havrilak and Negami and Williams and Watts equations indicated that the dipole relaxation was broadened and becoming more asymmetric with cross link density. The sulphonation of the cross …
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Materials For Energy: Complex Oxides And Nitrides For New Polymer Electrolyte Membrane Fuel Cell Catalysts And Supports
… currently used carbon-based catalyst supports in polymer electrolyte membrane fuel cells (PEMFC) are not sufficiently stable. New, non-carbon catalyst supports are required for large-scale commercialization of PEMFCS, and must be stable in low pH (1-2) and up to +1.5 V (vs. SHE). The material also …
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Using polymer electrolyte membrane fuel cells in a hybrid surface ship propulsion plant to increase fuel efficiency
An increasingly mobile US Navy surface fleet and oil price uncertainty contrast with the Navy's desire to lower the amount of money spent purchasing fuel. Operational restrictions limiting fuel use are temporary and cannot be dependably relied upon. Long term technical research toward improving …
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Study of the relationships between polymer electrolyte membrane fuel cell membrane electrode assembly component manufacturing defects and cell performance, A
Includes bibliographical references (pages 65-68).
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A comprehensive fractal approach in determination of the effective thermal conductivity of gas diffusion layers in polymer electrolyte membrane fuel cells
… of gas diffusion layers (GDL) used in polymer electrolyte membrane fuel cells (PEMFC‟s). This is one of the factors affecting the durability of a fuel cell and need to get a solution to minimize costs and optimize the use of electrodes and cells. The main objectives of this research …
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