摘要:
The invention relates to an alkaline fuel cell comprising at least one electrolyte (1) having an anode (2) disposed thereon. The anode (2) comprises a stack of layers consisting of a first thin layer (3) and a second thin layer (4), said second thin layer being disposed between the electrolyte (1) and the first thin layer (3). The first thin layer (3) is made from aluminium or aluminium alloy, while the second thin layer (4) is made from zinc or zinc alloy. Moreover, the anode (2) of the alkaline fuel cell is preferably produced using physical vapour-phase deposition in order to deposit the second thin layer (4), which is intended to come into contact with the electrolyte (1), on a substrate formed by the first thin layer (3) of aluminium or aluminium alloy.
摘要:
A fuel cell and a platform associated with the fuel cell include a common fluid cooling system. An apparatus comprising : a fuel cell; an integrated circuit; and a cooling system to cool the fuel cell and the integrated circuit; wherein the cooling system includes a fluid medium to remove heat from the fuel cell and the integrated circuit. The fluid medium may comprise a liquid metal.
摘要:
An electrochemical cathode includes a porous metal foam substrate, formed with a network of interconnected pores. An active layer and a hydrophobic microporous gas diffusion layer are both disposed on one or more surfaces of the metal foam substrate. The metal foam substrate serves as the current collector of the cathode. The microporous layer is a plastic material such as a fluoropolymer (i.e., PTFE). The cathode also includes a particulate microstructure reinforced by relatively strong bonding provided by sintering a polymeric binder within the three-dimensional interconnected porosity of the metal foam substrate. The reactive layers are preferably fabricated from the same material as binder. This advantageously enables a single roll pressing operation to simultaneously impregnate the binder into the substrate and form the reactive layers thereon.
摘要:
Das Verfahren ist ein Präparieren einer Beschichtungspaste (P), die zu einem Herstellen einer Funktionalschicht (6), insbesondere zum Herstellen einer Elektrode für Brennstoffzellen verwendbar ist. Die Beschichtungspaste enthält dispers verteilte, zwei Feststoffphasen bildende Partikel (101, 102). In der hergestellten Funktionalschicht sind auf einer Gas/Feststoff-Grenzfläche durch eine kombinierte Wirkung der beiden Feststoffphasen und mit gasförmigen Reaktanden katalytische Reaktionen aktivierbar. In einem ersten Schritt (1) werden die Feststoffphasen als feinkörnige Partikel (P1, P2) ausgebildet. Die Partikel beider Feststoffphasen werden vermischt sowie homogen verteilt (2) in einer ersten Flüssigkeit (L1) dispergiert. Aus der dabei entstandenen Dispersion (D) werden heterogene Konglomerate (P3) der feinkörnigen Partikel gebildet. Diese Konglomerate werden nach einem Sintern (4) durch Zugabe einer zweiten Flüssigkeit (L2) sowie unter einer Zerkleinerung (5) zu einer homogenen Paste (P) vermengt. Die im ersten Schritt ausgebildeten Partikel sind so feinkörnig, dass die heterogenen Konglomerate und deren Bruchstücke nach der Zerkleinerung jeweils eine Vielzahl von Partikeln beider Feststoffphasen enthalten.
摘要:
Fuel cell cathodes (1c) and instant startup fuel cells (7) employing the cathode(1c). The cathodes (1c) operate through the mechanism of redox couples which uniquely provide multiple degrees of freedom in selecting the operating voltages available for such fuel cells (7). Such cathodes(1c) provide the fuel cells (7) in which they are used a 'buffer' or 'charge' of oxidizer available within the cathode at all times.
摘要:
Conducting plastic electrodes and methods of preparing such electrodes are disclosed. The electrodes comprise a thermo-plastic polymer, an elastomeric polymer, and a conductive filler material.
摘要:
High surface area electrodes for use in electrical and electrochemical energy storage and conversion devices comprise conductive transition metal nitrides, carbides, borides or combinations thereof where the metal is molybdenum or tungsten. Disclosed is a method of manufacturing such electrodes by forming or depositing a layer of metal oxide, then exposing the metal oxide layer at elevated temperature to a source of nitrogen, carbon or boron in a chemically reducing environment to form the desired metal nitride, carbide or boride film. Also disclosed is an ultracapacitor comprised of the new high surface area electrodes having a specific capacitance of 100 mF/cm2 and an energy density of 100 mJ/cm3 with improved conductivity and chemical stability when compared to currently available electrodes.
摘要:
Un PEN de SOFC présente sur les faces arrières des électrodes destinées à venir au contact d'une plaque d'interconnexion plane une structure en relief choisie de telle sorte à former avec cette plaque des canaux de circulation de gaz. PEN et plaques d'interconnexion peuvent être percés de façon à créer des tubulures internes d'admission et d'évacuation des gaz. L'interface électrolyte/électrodes peut également présenter une structure en relief augmentant le rapport surface développée/surface projetée.
摘要:
An electrochemical fuel cell is provided for converting a fuel reactant stream and an oxidant reactant stream to a reaction product stream and electrical energy. The fuel cell includes a membrane electrode assembly interposed between two separator layers. The separator layers are formed of thin electrically conductive sheet material which is substantially impermeable to the fuel and oxidant reactant streams. The membrane electrode assembly comprises first and second electrode layers formed of porous electrically conductive sheet material. The electrode layers have a catalyst associated therewith, and an ion exchange membrane is interposed between the first and second electrode layers. The electrode layers include passages, such as the interstitial spaces within the electrode material or grooves formed in the surface of the electrode material, for flowing a reactant stream between an inlet and outlet within the electrode layer. The incorporation of the reactant flow passages within the electrode material permits the use of thin, lightweight separator layers, thus providing higher power-to-volume and power-to-weight ratios than conventional fuel cells having reactant flow passages engraved, milled or molded in the separator plates.