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Topic: Proton exchange fuel cells

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Fuel cell - Wikipedia, the free encyclopedia In the archetypal example of a hydrogen/oxygen proton-exchange membrane (or "polymer electrolyte") fuel cell (PEMFC), a proton-conducting polymer membrane separates the anode and cathode sides. Fuel cells are often considered to be very attractive in modern applications for their high efficiency and ideally emission-free use, in contrast to currently more common fuels such as methane or natural gas that generate carbon dioxide. Fuel cells cannot store energy like a battery, but in some applications, like stand-alone power plants based on discontinuous sources (solar, wind power), they are combined with electrolyzers and storage systems to form an energy storage system. en.wikipedia.org /wiki/Fuel_cells

DoD Fuel Cell - Fuel Cell Descriptions When hydrocarbon fuels are to be used or air is to be used as the oxidant, higher temperature fuel cells, the MCFC, the SOFC, and to some extent the PAFC, have an efficiency advantage over the PEFC at the system level. At the fuel cell stack level, electrical efficiency is determined by the voltage at which the fuel cell is operated. As the PEFC operates at about 175°F (80°C), the water is produced as liquid water and is carried out of the fuel cell by excess oxidant flow. dodfuelcell.cecer.army.mil /proton.html

DoD Fuel Cell - Fuel Cell Descriptions Fuel Cells generate electricity through an electrochemical process in which the energy stored in a fuel is converted directly into DC electricity. Fuel cells consist of an electrolyte material which is sandwiched in between two thin electrodes (porous anode and cathode). All fuel cells have the same basic operating principle. dodfuelcell.cecer.army.mil /fcdescriptions.html

United States Patent Application: 0020142205 [0004] Proton exchange membrane fuel cells (PEMFCs) include three constituents forming a basic unit of membrane and electrode assembly (MEA): an anode electrode for oxidation reaction, a cathode electrode for reduction reaction, and an electrolyte for ion transportation. The proton exchange membrane fuel cell stack of claim 1, wherein the fuel flow field comprises an orthogonal flow field in contact with the catalyzed membrane and a parallel flow field in contact with the orthogonal flow field, and the parallel flow field has a greater porosity than the orthogonal flow field. The proton exchange membrane fuel cell stack of claim, wherein the edges of each cell unit are sealed by an external sealing layer to form a single assembly of the cell unit. appft1.uspto.gov /netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=/netahtml/PTO/search-adv.html&r=1&f=G&l=50&d=PG01&p=1&S1=20020142205&OS=20020142205&RS=20020142205

Types - Proton Exchange Membrane Fuel Cells Proton Exchange Membrane Fuel Cells (PEMFC) are believed to be the best type of fuel cell as the vehicular power source to eventually replace the gasoline and diesel internal combustion engines. The fuel for the PEMFC is hydrogen and the charge carrier is the hydrogen ion (proton). PEM fuel cells use a solid polymer membrane (a thin plastic film) as the electrolyte. www.fctec.com /fctec_types_pem.asp

DuPont.com: DuPont Forms Fuel Cell Business DuPont is focusing on proton exchange membrane (PEM) fuel cells used in portable, stationary and transportation applications. The formation of DuPont Fuel Cells provides the business platform from which to develop and commercialize technologies from the company's Fluoroproducts, iTechnologies, Engineering Polymers, Corporate Research and Development and DuPont Canada organizations. DuPont is seeking a strong presence in what it believes will be a $10 billion total market for fuel cells by the year 2010. www.dupont.com /corp/news/releases/2001/nr02_08_01.html

UAF Newsroom: PEM Fuel Cell Laboratory Demonstration Proton exchange membrane fuel cells use a polymer electrolyte, similar to Gore-TEX raingear. A one-kilowatt proton exchange membrane fuel cell will be delivered to the University of Alaska Fairbanks Energy Center next week. The fuel cell system, built by Schatz Energy Research Center at Humboldt State University in Arcata, Calif., includes a methanol reformer device which converts methanol into hydrogen for use in the fuel cell. www.uaf.edu /news/a_news/20031016105747.html

Lynntech Products: PEM Fuel Cells A proton exchange membrane (PEM) fuel cell is a device capable of generating electricity directly by means of two electrochemical reactions which take place at the proton exchange membrane/catalyst interface at low temperatures (<80° C). The key step in the operation of most fuel cells is the electrochemical oxidation of hydrogen to produce water, as shown in the drawing. If you would like to be notified when commercial fuel cells become available, or if your organization would like to participate in the development of this technology, please contact us. www.lynntech.com /licensing/pem_fuelcell/index.shtml

Start up of proton exchange membrane fuel cell (US6127056) In a fuel cell having a proton exchange membrane electrolyte and process oxidant channel, fed through an oxidant inlet manifold, in which oxidant is transported to the cathode side of the fuel cell, a method of warming the fuel cell during start up of operation, comprising: A proton exchange membrane fuel cell has a noble metal or noble metal alloy catalyst 15 disposed in its air inlet manifold 13. During start up, a fuel cell is warmed to operating temperature by introducing a small amount of hydrogen into a flow of air to the air inlet 12 of the fuel cell where they react with the catalyst to produce heat at subflame temperatures. www.delphion.com /details?pn=US06127056__

Proton Exchange Membrane Fuel Cell (PEMFC) - NFCRC Tutorial PEFCs are capable of operation at pressures from 0.10 to 1.0 MPa (10 to 100 psig) and with suitable current collectors and supporting structure, these fuel cells may be capable of operating at pressures as high as 3000 psi. This type of fuel cell also known as the Polymer Electrolyte Membrane Fuel Cell consists of a proton conducting membrane, such as a perfluorosulphonic acid polymer as the electrolyte which has good proton conducting properties, contained between two Pt impregnated porous electrodes. Note that the fuel cell operates on H2 while only a few ppm of CO may be tolerated by the Pt catalysis at its operating temperature of 175 deg F or 80 deg C. If a hydrocarbon fuel such as natural gas is used as a fuel, reforming of the fuel by the reaction: www.nfcrc.uci.edu /EnergyTutorial/pemfc.html

Fuel Cell News - News of Fuel Cells and the Hydrogen Economy It was a quiet caravan, powered by fuel cells that silently harvested the energy of hydrogen bonds and fed by air compressors that, depending on the automaker and speed, hummed and whined like a distant swarm of bees. Polymer fuel cells operate at much lower temperatures but are much fussier about the quality of their fuel and consequently less efficient. Fuel Cells Canada, the national industry association for Canada's hydrogen and fuel cell sector, appointed John Tak as its new President and CEO. www.fuelcellstocks.com /fuelcellnews.htm

GTI Long-Term Proton Exchange Membrane Fuel Cell Testing Shows Outstanding Results GTI Long-Term Proton Exchange Membrane Fuel Cell Testing Shows Outstanding Results DES PLAINES, Ill., Oct. 29 /PRNewswire/ -- Gas Technology Institute (GTI) researchers have verified excellent long-term performance and stability of advanced proton exchange membrane (PEM) fuel cell components. GTI is now running the PEM fuel cell stack in a periodic start/stop- operating mode simulating vehicle operation. www.prnewswire.com /cgi-bin/stories.pl?ACCT=104&STORY=/www/story/10-29-2003/0002047206&EDATE=

Model Gallery : Serpentine Proton Exchange Membrane Fuel Cell Cathode Model Gallery : Serpentine Proton Exchange Membrane Fuel Cell Cathode The model is based on simple charge and mass balances in the gas diffusion electrodes and the electrolyte in the fuel cell. This study exemplifies the use of modeling in the design of experiments and fuel cell prototypes. www.comsol.com /showroom/gallery/256.php

The Proton Exchange Membrane Fuel Cell Once fuel cells are commercialized, especially in automobiles, this type of fuel cell are ideal. These fuel cells have a high power density and can vary their output quickly to meet shifts in power demand. The United States Department of Energy states that PEM fuel cells "…are the primary candidates for light-duty vehicles, for buildings, and potentially for much smaller applications such as replacements for rechargeable batteries in video cameras." chemelab.ucsd.edu /fuelcell/PEM.htm

the Proton Exchange Membrane Fuel Cell ECN < Fuel Cell Technology < the fuel cell explained < the Proton Exchange Membrane Fuel Cell The polymer is capable of conducting positive hydrogen ions: protons. The MEA is clamped between two gas flow field compartments to produce a single cell. www.ecn.nl /bct/fuelcellinfo/pemfc.en.html

Fuel Cell Today - Opening doors to fuel cells commercialisation The present invention relates to a novel structure of a single cell module of a proton exchange membrane fuel cell (PEMFC), comprising an anode bipolar plate, a cathode bipolar plate and a membrane electrode assembly (MEA) sandwiched therebetween. Modular single cell and assembled cell stack of a proton exchange membrane fuel cell Fuel Cell Today - Opening doors to fuel cells commercialisation www.fuelcelltoday.com /PatentListings/PatentListingsExternal/DisplayPatent/0,1391,562,00.html

Fuel Cell Development in China Fifty-four percent of fuel cell technology in China is based on proton exchange membrane fuel cell (PEMFC), the most prominent fuel cell technology for transportation applications worldwide. Fuel cells are still extremely expensive, over $4,000 per kilowatt, and in transportation applications fuel cells are still very fragile. Alternative fuel technologies that represent the greatest opportunities for Canadian firms in China are compressed natural gas, liquified petroleum gas and fuel cells. www.ecoworld.com /Home/Articles2.cfm?TID=352

Vision Engineer - Proton Exchange Membrane Fuel Cell The electrolyte in this fuel cell is an ion exchange membrane which is a good proton conductor. Water management in the membrane is crucial for efficient performance: The fuel cell must operate under conditions where the by-product water does not evaporate faster than it is produced because the membrane must be hydrated. Also known as Polymer Electrolyte Membrane Fuel Cell, this low temperature fuel cell is mainly used in vehicle applications. www.visionengineer.com /env/pem.php

Itochu, Hitachi Zosen Demonstration Test of Proton Exchange Membrane Fuel Cell Itochu, Hitachi Zosen Demonstration Test of Proton Exchange Membrane Fuel Cell Tokyo, Japan, May 27, 2004 - (JCN Newswire)- ITOCHU Corporation (TSE: 8001) will start a demonstration test involving a Proton Exchange Membrane (PEM) Stationary Fuel Cell, in collaboration with Hitachi Zosen Corporation (TSE: 7004) and Hydrogenics Corporation of Canada. Hydrogenics Corporation (http://www.hydrogenics.com) is a leading clean power generation company, engaged in the commer- cialization of hydrogen and fuel cell technology and test stations for fuel cells. www.japancorp.net /Article.Asp?Art_ID=7415

NanoInvestorNews - Pacific Fuel Cell Corp. Announces Development of Proton Exchange Membrane Fuel Cell with Carbon Nanotube-Based Electrodes Pacific Fuel Cell Corp. expects that the use of multi-walled carbon nanotubes as a platinum support for proton exchange membrane fuel cells will reduce the manufacturing cost of fuel cells through an increased utilization of platinum. Professor Yan, a principal researcher for Pacific Fuel Cell Corp., received his Ph.D. from the California Institute of Technology and is a leading authority on high temperature proton conductive membranes and nanostructured electrodes. TUSTIN, Calif.--(BUSINESS WIRE)--Nov. 11, 2003--Pacific Fuel Cell Corp. [profile] is pleased to announce that a research team headed by Professor Yushan Yan of the University of California at Riverside [profile], under a contract with PFCE, has successfully developed a fuel cell using carbon nanotube-based electrodes. www.nanoinvestornews.com /modules.php?name=News&file=article&sid=2045

Fuel Cells 2000 : Information Resources : Fuel Cell Library Fuel Cells and Hydrogen: The Path Forward - this report represents a coalition of 26 leading fuel cell companies to answer the Congressional call for a national fuel cell and hydrogen strategy. Examines using renewably-produced hydrogen in fuel cells for utility and vehicle applications. Auto Companies on Fuel Cells - report by Fuel Cells 2000. www.fuelcells.org /info/fclib.html

SERC: Fuel Cells A PEM (Proton Exchange Membrane, also called Polymer Electrolyte Membrane) fuel cell uses a simple chemical reaction to combine hydrogen and oxygen into water, producing electric current in the process. As a result, the hydrogen ions flow directly through the proton exchange membrane to the cathode, while the electrons flow through an external circuit. The proton exchange membrane allows protons to flow through, but not electrons. www.humboldt.edu /~serc/fc.html

fuel cell Engineering Web Results Photochemically Etched Anodes & Cathodes PHOTOFABRICATION ENGINEERING, INC. (PEI), Milford, MA, is offering a line of custom-made, photochemically-etched anodes and cathodes for fuel cells, heat exchangers, and oxygen and hydrogen generators. Fuel Cell Store.com is integrating and advancing the fuel cell industry, by offering electrolysers, hydrogen storage systems, hydrogen energy consulting, alternative energy, renewable energy.. Fuel Cell Systems Components Eptam Plastics supports the leading manufacturers of fuel cell systems, machining intricate complex components. search.globalspec.com /Industrial/fuel_cell

hydrogen fuel cell car Kosmos fuel cell car It's in German, the cost is denominated in markss, and I can't read it, but it kicks butt. There were several "hybrid" vehicles on display, and there was one cross-sectioned specimen of a hydrogen fuel cell car, which might have fooled most of the attendees but seemed to me an obvious hoax... The Science Bowl team was 6th in the nation and 3rd in a hydrogen fuel cell car competition. www.shopping-internet.com /carfuels/hydrogenfuelcellcar

Howstuffworks "How Fuel Cells Work" We'll detail how one of the most promising technologies works, and we'll discuss the potential applications of fuel cells. You may have heard a lot recently about fuel cells. According to many news reports, we may soon be using the new energy-saving technology to generate electrical power for our homes and cars. www.howstuffworks.com /fuel-cell.htm

High Temperature Proton Exchange Membrane Fuel Cells Development of High Temperature Proton Exchange Membrane Fuel Cells Lvov, S.; Allcock, H. Using a new class of proton exchange membranes, Lvov and his associates at Penn State will develop a high temperature proton exchange membrane fuel cell. Improvements in proton conductivity, electrosmotic drag water, thermal stability, and mechanical strength and the development of technologies for preparation of the membrane electrode assemblies using polyphosphazene membranes will allow the fuel cell to operate at elevated temperatures, perhaps as high as 250 www.engr.psu.edu /ce/enve/h2e/Pub/Lvov_et_al_1.htm

Welcome to Mechanical Engineering - FACULTY - Frano Barbir In these positions, he assembled and led research teams covering all areas of Proton Exchange Membrane fuel cell technology including electrochemistry, materials, heat transfer and fluid mechanics. He is co-inventor on several fuel cell related patents, and has authored or co-authored more than 100 publications, mostly on fuel cells and hydrogen energy that appear in scientific journals, books, encyclopedia and conference proceedings. He is currently an Associate Editor of the International Journal of Hydrogen Energy, serving as Editor-in-Charge of that publication’s special issues on fuel cells. www.engr.uconn.edu /me/me_barbir.htm

Part 2 of 3. Electrochemistry FAQ. http://www.grc.org/programs/2005/anachem.htm Fuel Cell Gordon Research Conference, Smithfield, RI, July 17-22, 2005. http://www.knowledgepress.com/events/6301210_p.pdf (9.) Popular science information Fuel cell facility model for hobbyists G. Furukawa, Nuts & Volts, Vol. http://www.grc.org/programs/2005/elecchem.htm Lucerne Fuel Cell Forum 2005 Lucerne, Switzerland, July 4-8, 2005. www.talkaboutscience.com /group/sci.chem.electrochem/messages/14561.html

The Hydrogen Fuel Cell Institute Get a fuel cell Commentary Institutions Contact us Put a live mini version of the WilderHill Fuel Cell Index 'ticker' right on your desktop! www.h2fuelcells.org

Brennstoffzelle PEM emissionsfrei Dr. Heidelberg: Proton Motor GmbH Brennstoffzelle PEM emissionsfrei Dr. Heidelberg: Proton Motor GmbH www.proton-motor.de /protonenglisch/index2.html

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