摘要:
A process is provided whereby a membrane/electrode assembly for polymer electrolyte fuel cells whereby a high output voltage is obtainable within a wide range of current densities. A process for producing a membrane/electrode assembly 1 comprising a first electrode 10 having a first catalyst layer 12 and a first gas diffusion layer 14, a second electrode 20 having a second catalyst layer 22 and a second gas diffusion layer 24, and an electrolyte membrane 30, wherein the first gas diffusion layer 14, a first intermediate having the first catalyst layer 12 formed on the surface of the electrolyte membrane 30 by coating followed by annealing, and a second intermediate having the second catalyst layer 22 formed on the surface of the second gas diffusion layer 24 by coating, are bonded, so that the first catalyst layer 12 is located between the first gas diffusion layer 14 and the electrolyte membrane 30, and the second catalyst layer 22 is located between the second gas diffusion layer 24 and the electrolyte membrane 30.
摘要:
A fuel cell membrane-electrode assembly having a fuel electrode (4a) and an oxidant electrode (4b) has a non-supported-catalyst containing catalyst layer (2) that contains a metal catalyst nanoparticle (8) of 0.3 nm to 100 nm in primary particle diameter that is not supported on a support, and an electrochemically active surface area of the metal catalyst nanoparticle (8) is 10 m 2 /g to 150 m 2 /g, and a layer thickness of the non-supported-catalyst containing catalyst layer (2) is less than or equal to 10 μm.
摘要:
An apparatus and a method for manufacturing electrical and optical materials by ink-jet printing of electronic ink(s) onto a flexible substrate are provided. The apparatus includes a flexible substrate, a first roll and a second roll, a printing head for depositing a electronic ink onto the substrate according to a predetermined pattern, and a drying station for drying an amount of deposited electronic ink. Each roll is reversibly configured for feed or takeup of the substrate. When dry, the deposited electronic ink forms one of an electronic material, an optical material, a display, and a fuel cell electrode. The apparatus may also include a second printing head configured for depositing a second electronic ink onto the substrate after the first ink has dried. The apparatus may be configured to rewind the substrate prior to deposition of the second ink, or to reverse the feed/takeup direction of the rolls.
摘要:
A microporous layer supported on a transfer substrate, wherein the microporous layer comprises carbon particles and a hydrophobic polymer, and a polymer layer is present on the microporous layer is disclosed. Processes for preparing the microporous layer on the transfer substrate and for depositing the microporous layer onto a gas diffusion substrate are also disclosed.
摘要:
A fuel cell includes a porous frit based composite proton exchange membrane. The pores of the porous frit are filled with a proton-conducting material.
摘要:
A method of making a five-layer membrane electrode assembly is provided which includes the steps of: providing a catalyst coated membrane web; providing a laminating station wherein the catalyst coated membrane web is drawn between a pair of laminating rollers which form a laminating nip; die-cutting first and second webs of gas diffusion layer material to make first and second gas diffusion layers; feeding first and second gas diffusion layers into the laminating nip adjacent to the catalyst coated membrane web; and laminating the first gas diffusion layer, catalyst coated membrane web and second gas diffusion layer to form a laminate.
摘要:
A fabrication method for catalyst coated membranes includes the steps of : exposing a micro-porous membrane to a catalyst dispersing solution to form a catalyst containing micro-porous membrane; exposing the catalyst containing micro-porous membrane to a resin dispersing solution to form a catalyst layer; and placing a proton exchange membrane between two of the catalyst layers with a laminating process to form the catalyst coated membrane. The fabrication method provides a filling process to uniformly fill the catalyst and resin throughout the pores of the micro-porous membranes in the catalyst layers. The micro-porous membranes are hydrophobic and easily discharge water when necessary. Therefore, membrane electrode assemblies with catalyst coated membranes fabricated using the method are stable and perform well during fuel cell operation.
摘要:
L' invention se rapporte à un procédé de fabrication d'une pile à combustible en couches minces, ce procédé comportant les étapes suivantes : - on dépose, par pulvérisation plasma dans une enceinte à vide, sur un substrat diffuseur de gaz, une première électrode de carbone poreux, cette électrode comportant également un catalyseur, le catalyseur étant utilisé pour accélérer au moins une des réactions chimiques ayant lieu dans la pile à combustible, - on dépose sur cette première électrode, une membrane réalisée en un matériau conducteur protonique, cette membrane étant (de préférence) d'une épaisseur inférieure à 20 micromètres. - on dépose, par pulvérisation plasma dans une enceinte à vide, sur la membrane, une seconde électrode de carbone poreux, cette seconde électrode comportant également un catalyseur.