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Showing 1 to 13 of 13 for “"PEFC"”.
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Development of a semi–empirical reaction kinetic model for PEM fuel cells
… production, polymer electrolyte fuel cells (PEFC) have been at the pinnacle of global research. One of the major drawbacks of PEFCs is therequirement for expensive noble metal catalysts (platinum and ruthenium). Furthermore 75% of the overpotential losses at the cathode are due to the …
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Microchannel flow fields for polymer electrolyte fuel cells
… fuel cells, the polymer electrolyte fuel cell (PEFC) is the leading candidate for portable, automotive and more recently stationary applications. One of the key challenges affecting both the performance and durability of low temperature PEFCs is water management. Various water management …
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Oxygen reduction reaction on carbon supported dispersed platinum nanoparticles and extended platinum surfaces
… loadings in polymer electrolyte fuel cells (PEFCs) remains one of the main deterrents preventing their broad commercialisation. The reaction of interest in this work is the oxygen reduction reaction (ORR) occurring at the cathode side of the PEFC. The ORR has been studied at great length …
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Preparation and characterisation of inorganic nanostructured support materials for polymer electrolyte fuel cells
Polymer electrolyte fuel cells (PEFCs) have been identified as a safe, clean and reliable alternative energy conversion technology to conventional, fossil fuel based, ones. However, the hindrance to worldwide commercialisation of this technology lies in the poor durability and high costs associated …
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Preparation of catalyst coated membranes using screen printing
… of fuel cells, Polymer Electrolyte Fuel Cells (PEFCs) have already been demonstrated in transportation appliances from light-duty vehicles to buses and in portable appliances including laptops and cell phones. A key component of a PEFC is its platinum electrocatalyst. With an estimated 75% of …
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Interfacial Transport Phenomena of the Non-Wetting Phase in Porous Media: Applied to Polymer Electrolyte Fuel Cell Gas Diffusion Media
… layer of polymer electrolyte fuel cells (PEFCs). </p> <p>Evidence of a region of gradual property change between the microporous layer and macroporous layer of bi-layer diffusion media is presented, and a mathematical model describing the effects of this gradual interfacial region is …
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Ti3C2Tx as an Advanced Support Material for Polymer Electrolyte Fuel Cell Catalysts to Facilitate the Oxygen Reduction Reaction
Polymer electrolyte fuel cell's (PEFC's) have the potential to offer a leading energy conversion technology. These fuel cells make use of hydrogen and oxygen and by means of a chemical reaction, electricity, heat and liquid water are produced. In 2015 the Department of Energy (DoE) of the United …
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Feasibility analysis of polymer electrolyte fuel cells for residential cogeneration applications in Australia
… feasibility for the implementation of the PEFC (Polymer Electrolyte Fuel Cell) stacks for Distributed generation in Australia. The disposition of the thesis starts with an introductory background that highlights the need for a distributed energy system where Hydrogen acts as the main energy …
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Transient Model of Heat,Mass,and Charge transfer as well as Electrochemistry in the Cathode Catalyst Layer of a PEMFC
A transient model of the cathode catalyst layer of a proton exchange membrane fuel cell is presented. The catalyst layer structure can be described as a superposition of the polymer membrane, the backing layer, and some additional platinum particles. The model, which incorporates some of the …
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Dynamische Simulation der Kraft-Wärme-Kopplung mit erdgasbetriebenem Brennstoffzellen-Heizgerät im Einfamilienhaus
Mit der vorliegenden Arbeit soll ein Beitrag zur ganzheitlichen Betrachtung eines erdgasbetriebenen Brennstoffzellen-Heizgerätes mit PEMFC und Autothermer Reformierung zur Kraft-Wärme-Kopplung im Einfamilienhaus geleistet werden. Wesentliches Ziel besteht in der Entwicklung und Anwendung eines …