摘要:
A molten carbonate fuel cell cathode having a cathode body and a coating of a mixed oxygen ion conductor materials. The mixed oxygen ion conductor materials are formed from ceria or doped ceria, such as gadolinium doped ceria or yttrium doped ceria. The coating is deposited on the cathode body using a sol-gel process, which utilizes as precursors organometallic compounds, organic and inorganic salts, hydroxides and alkoxides and which uses as the solvent water, organic solvent or a mixture of same.
摘要:
A proton exchange membrane (PEM) fuel cell comprises a proton exchange membrane, an anode formed on a first surface of the membrane for exposure to a fuel and a cathode formed on a second surface of the membrane for exposure to an oxidant. In order to utilise a hydrocarbon such as methanol as a fuel without pre-conditioning, and thus simplify fuel preparation, the electrodes are coated with to a titanium dioxide photocatalyst irradiated by a source of ultra violet radiation.
摘要:
Carbon nanostructure (e.g., CNF) electrodes disclosed herein may be conveniently prepared on conductive substrates by pyrolysis of an organometallic nanostructure precursor in a reducing atmosphere. Such electrodes may possess suitable properties for preparation of electrocatalytic electrodes and electrochemical sensors. High surface area nitrogen doped CNFs prepared according to certain embodiments are conductive and may exhibit high stability and improved catalytic activity for O 2 reduction in aqueous solutions.
摘要:
The present invention provides a method for conveniently manufacturing a solid oxide fuel cell (SOFC) at a cost that is less than five-hundred dollars per kilowatt of electricity. The method comprises forming an electrode layer and depositing an electrolyte material on the surface of the electrode. The formed structure is an electrode-electrolyte bi-layer. A second electrode is deposited onto this bi-layer to form a multilayer fuel cell structure comprising an electrolyte positioned between two electrodes. This multilayer structure is then heated and fired in a single thermal cycle to remove any binder materials and sinter, respectively, the fuel cell. This thermal cycle can be performed in a furnace having one or more chambers. The chamber(s) preferably contains a variable or multiple frequency microwave source for heating the cell and removing binder materials in the electrolyte and electrode structures. The chamber(s) also preferably include a convection and/or radiation source for sintering the fuel cell. In addition, the method of the invention harmonizes and minimizes the deviation among the thermophysical properties of the electrolyte and electrode structures. This harmonization reduces and minimizes the temperature gradient within the cell such that the structure can be uniformly heated and fired during the thermal cycle. The multilayer structure is also unlikely to distort and fracture by minimizing the temperature gradient in the cell. An SOFC can also be manufactured by the present method in an order of magnitude less time than standard processes.
摘要:
A double layered oxygen electrode (10) impregnated with an active catalyst material and method of making. The design of the oxygen electrode promotes oxygen dissociation and absorption within the oxygen electrode. The oxygen electrode has differing layers (11, 12) of hydrophobicity which allow chemical impregnation of the active catalyst material into the oxygen electrode where the active catalyst material is needed most.
摘要:
An electrochemical cell (70) can comprise: a first electrode (88) and a second electrode (90) with a membrane (86) disposed therebetween and in ionic communication with the first electrode (88) and the second electrode (90) and a sintered porous support member (72) disposed on a side of the membrane (86) opposite the second electrode (90), wherein the support member (72) comprises a first portion (96) on first side of the support member (72) proximate the membrane (86) and a second portion (94) disposed on a side of the first portion (96) opposite the membrane (86), wherein the second portion (94) has a second portion porosity different from a first portion porosity.
摘要:
A metal-coated, wire-reinforced polymer electrolyte membrane that is permeable only to protons and hydrogen is disclosed. The metal-coated, wire-reinforced polymer electrolyte membrane has a surface microstructure that prevents cracking of the metal coating during hydration. The metal-coated, wire-reinforced polymer electrolyte membrane can be used in liquid-type fuel cells to prevent crossover of fuel, gas and impurities.
摘要:
A polymer composite is described which comprises one or more polymer(s) (including without limitation polymer blends, co-polymers, or tri-polymers), conductive particles, and, optionally, catalytic particles. The polymer composite may be used to compose an active or backing layer in an electrode configured for use in a fuel cell or fuel cell system.
摘要:
A gas diffusive electrode body used for an electrochemical device such as a fuel cell, comprising a stacked structure having layers (22) formed of at least conductive carbon powder or granular body (1) and platinum spatter layers (19) of platinum disposed alternately each other, whereby the size thereof can be reduced while maintaining the amount of power generation.
摘要:
An electrically conducting gas diffusion substrate, capable of removing oxidisable impurities from an impure gas stream, which comprises an electrically conducting porous structure and a first catalytic component, wherein the first catalytic component comprises a first catalyst supported on an electrically non-conducting support is disclosed. In addition, an electrode, a membrane electrode assembly and a fuel cell each comprising said electrically conducting gas diffusion substrate is disclosed.