Flexible graphite composite electrode

Flexible graphite composite electrode

This invention ensures sufficient gas diffusion and ion-conduction in a fuel cell catalyst electrode. This arrangement does not tequire a thick electr...

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This invention ensures sufficient gas diffusion and ion-conduction in a fuel cell catalyst electrode. This arrangement does not tequire a thick electrolyte layer to ensure sufficient transmission of ions, but enables sufficient oxygen to be fed to the catalyst. Patent number: US 6015635

Flexible graphite composite electrode Applicant: Uear Carbon Technology, USA Here a flexible graphite sheet has embedded ceramic fibres extending into the sheet, to provide permeability to gases so that it is useful as a fuel cell electrode. Patent number: WO 00/03445

This fluid flow plate assembly has a high degree of flexibility and improved functionality. It provides for fluid flow while retaining the greatest possible structural integrity, as well as providing an inexpensive seal that avoids corrosion problems inherent with drilled holes. Patent number: US 6017648

are connected in series vIa an electrically conductive transverse structure, whose intermediate area surface is impermeable to fuel. The adjacent cell membranes extend into the intermediate area, overlap each other and form a seal. Patent number: WO 00/05776

Gas diffusion electrodes

Applicant: De Nora, Italy These current conductors have a highly distributed, extremely smooth segmented contact area on the electrode surface. and are at the same time remarkably porous and permeable to the gas flow. Patent number: US 6022634

Applicant: De Nora, Italy The hydrophobicity of a carbon prelayer and a catalytic Pt-C layer applied to a thin, porous conductive substrate are adjusted to obtain the best exploitation of the catalyst and to improve the water balance of the process. Patent number: US 6017650

Fuel cell system Fuel cell separator Applicant: Toyota Chuo Kenkyusho, Japan This fuel cell separator can maintain low contact resistance for a long time in an oxidative vapour atmosphere. It is produced by forming a large number of Sn or Sn-alloy projections on the separator plate surface. Patent number: WO 00/03446

Integrated SOFClion transport reactor Applicant: Praxair Technology, USA This process integrates an ion transport reactor with a highly efficient solid oxide fuel cell for the generation of product gases and electric power, to realise an improved efficiency. Patent number: US 6017646

Electrode structure Applicant: Dow Chemical, USA This invention relates to solid oxide or ceramic fuel cell devices in which the lower total internal cell resistance results in better performance at relatively low operating temperatures of about 700-800°e. Patent number: US 6017647

Fluid flow plate Applicant: Plug Power, USA

Applicant: dbb fuel cell engines, Germany The invention relates to a fuel cell system in which the carbon monoxide m hydrogen-rich reformate is selectively oxidised, and which also features a heat exchanger in the gas purification stage. Patent number: WO 00/04600

Membrane electrode assembly Applicant: IFC, USA This MEA has good sealing characteristics, and may be continuously manufactured at low cost since the manufacturing tolerances are easier to maintain. Patent number: US 6020083

Bipolar collector Applicant: Sorapec, France This bipolar collector design IS applicable to plates incorporating fluid transport ducts or microporous fluid distribution channels. The collector's ohmic drop is vety low, it has a low surface mass, and it is vety easy to use. Patent number: WO 00/05775

PEM fuel cell Applicant: Fraunhofer-Gesellschaft, Germany The patent relates to a fuel cell for high output voltages, in which cells

Gas diffusion electrodes

Porous support plate Applicant: International Fuel Cells, USA This porous support plate enhances fluid transport throughout the cell, as well as increasing its capacitance and improving its tranSient response. Patent number: US 6024848

Fuel cell generator energy dissipator Applicant: Siemens Westinghouse Power Corporation, USA This invention eliminates the chemical energy of fuel remaining in a fuel cell generator when its output is electrical power terminated. It provides a safety function in eliminating the fuel energy, and also protects the fuel cell stack by eliminating overheating. Patent number: US 6025083

Polymer electrolytes by direct acid casting Applicant: Case Western Reserve University, USA A method is described for casting solid polymer electrolyte membranes compnsmg proton-conducting polymers directly from acid solution, that are stable above 100°C and have enhanced conductivity. In particular, polybenzimiadazole (PBI) mem• branes may be cast from trifluoroacetic acid doped with H,P0 4· Patent number: US 6025085

High-temperature fuel cell Applicant: Siemens; Fraunhofer_ Gesellschaft, Germany In this high-temperature fuel cell a contact material is applied to the bipolar plate, then heated to 800°e. A pore-forming material is added to the con tact material before application, to ensure high deformability of the ceramic contact layer. Patent number: WO 00/08701

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Features Honeycomb SOFe structure Applicant: NGK Insulators, Japan This monolithic solid oxide fuel cell has a honeycomb structural body. Its power generation efficiency per unit volume IS extremely high. and the gas-tightness of the honeycomb channels means that a seal-less structure can be readily produced. Patent number: US 6025084

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