Abstract:
The invention relates to a method for the production of a diffusion layer for a gas diffusion electrode (GDE), which contains a halogenated polymer and is provided with pore channels that are formed by pores, the majority of the pore channels being oriented. Gas diffusion electrodes that comprise such diffusion layers are characterized by excellent current densities and material-conveying properties.
Abstract:
The present invention relates to ferroxanes and a method of making wherein a ferroxane may be defined by the general formula [Fe(O)x(OH)y(O2CR)z]n wherein x, y and z may be any integer or fraction such that 2x + y + z = 3 and n may be any integer. The ferroxanes may be doped with at least one other element other than iron. The present invention further relates to a ceramic made from the ferroxanes of the present invention and a method of making. The present invention still further relates to supported and unsupported membranes made from the ceramic of the present invention.
Abstract:
There is provided a polymer electrolyte fuel cell which comprises a pair of electrodes, a polymer electrolyte membrane interposed between the pair of the electrodes, a first conductive separator having a channel for supplying an oxidant gas to one of the electrodes therethrough, and a second conductive separator having a channel for supplying a fuel gas to the other of said electrodes therethrough, wherein at least one of the electrodes comprises a porous catalyst layer formed on the surface of the polymer electrolyte membrane, or formed on the surface of a porous conductive base material, the porous catalyst layer facing the polymer electrolyte membrane.
Abstract:
A membrane electrode assembly comprising a composite membrane having a first major surface area and a second major surface area comprising a porous polymeric matrix containing ionically conductive solid and ionomeric binder, at least one protective layer disposed adjacent to the porous polymeric matrix membrane comprising an ionomeric binder and an ionically conductive solid, an anode comprising an oxidizing catalyst adjacent said first major surface area of said composite membrane and a cathode comprising a reducing catalyst adjacent said second major surface area of said composite membrane, and a method for manufacturing the same.
Abstract:
The present invention provides a polymer electrolyte fuel cell having an increased reaction area by forming a gas channel, a proton channel and an electron channel very close to each other inside a catalyst layer. This polymer electrolyte fuel cell includes a hydrogen ion conductive polymer electrolyte membrane; and a pair of electrodes having catalyst layers sandwiching the hydrogen ion conductive polymer electrolyte membrane between them and gas diffusion layers in contact with the catalyst layers, in which the catalyst layer of at least one of the electrodes comprises carbon particles supporting a noble metal catalyst, and the carbon particles include at least two kinds of carbon particles adsorbing a hydrogen ion conductive polymer electrolyte in mutually different dispersed states.
Abstract:
The aim of the invention is to provide a mechanically stable microreactor that can be subjected to high electrical loads and that is used in an electrode system of a fuel cell. To this end, a fuel component flows towards a filament (98) through at least one flow channel (102). Said filament is configured as a radially inner electroconducting electrode of the microreactor (97) and is linked with a radially outer membrane (101), the two structures supporting one another. The radially inner peripheral surface of the membrane (101), at least in some sections, is spaced apart from a supporting core (55) of the filament (98) by spokes (100), thereby forming at least one flow channel (102).
Abstract:
The present invention relates to a third electrode (104) for use in a metal-air tricell (100, 200) comprising a support structure coated with a layer of a lanthanum nickel compound/at least one metal mixture, wherein the mixture is adhered to the support structure without the use of an adhesive. The present invention relates to a metal-air tricell comprising an air electrode (102), a metal electrode (106), and the third electrode (104). Additionally, the present invention relates to a method of forming a third electrode, comprising the steps of: a) applying a mixture of a lanthanum nickel compound and at least one metal oxide to a support structure, and b) heating the coated support structure in order to reduce the metal oxide present in the lanthanum nickel compound/metal oxide mixture to its corresponding metal and to adhere the lanthanum nickel compound/metal mixture to the support structure.
Abstract:
A fuel cell design for use at low pressure. The invention has a reduced number of component parts to reduce fabrication costs, as well as a simpler design that permits the size of the system to be reduced at the same time as performance is being improved. In the present design, an adjacent anode and cathode pair are fabricated using a common conductive element, with that conductive element serving to conduct the current from one cell to the adjacent one. This produces a small and simple system suitable for operating with gas fuels or alternatively directly with liquid fuels, such as methanol, dimethoxymethane, or trimethoxymethane. The use of these liquid fuels permits the storage of more energy in less volume while at the same time eliminating the need for handling compressed gases which further simplifies the fuel cell system. The electrical power output of the design of this invention can be further increased by adding a passage for cooling the stack through contact with a coolant. In particular the invention relates to a low pressure gas electrode, comprising an electrically conducting substrate wherein the substrate comprises at least two opposite faces; a plurality of openings allowing passage from one face to an opposite face, wherein the openings encompass between about 10% and about 90% of the total area of the substrate and an electrically conductive porous material bound to the substrate comprised of a electrically conductive component and a binding component.