摘要:
An object is to effectively restrain Cr diffusion from a corner portion of a protrusion of a cathode-side current collector. The electrochemical reaction unit includes a single cell including an electrolyte layer containing solid oxide, and a cathode and an anode which face each other in a first direction with the electrolyte layer intervening therebetween; a current collector disposed on a cathode side of the single cell and having a protrusion protruding toward the cathode; an electrically conductive coat covering a surface of the current collector; and an electrically conductive bonding layer bonding the cathode and the protrusion covered with the coat. In all sections of the protrusion taken in parallel with the first direction, a corner portion of the protrusion covered with the coat is covered with the bonding layer.
摘要:
An onboard electrochemical system of an electrochemical cell including a cathode and an anode separated by an electrolyte separator is selectively operated in either of two modes. In a first mode of operation, water or air is directed to the anode, electric power is provided to the anode and cathode to provide a voltage difference between the anode and the cathode, and nitrogen-enriched air is directed from the cathode to an aircraft fuel tank or aircraft fire suppression system. In a second mode of operation, fuel is directed to the anode, electric power is directed from the anode and cathode to one or more aircraft electric power-consuming systems or components, and nitrogen-enriched air is directed from the cathode to a fuel tank or fire suppression system.
摘要:
An electrochemical energy conversion device 10 comprising a stack of solid oxide electrochemical cells 12 alternating with gas separators 14, 16, wherein scavenger material selected from one or both of free alkali metal oxygen-containing compounds and free alkaline earth metal oxygen-containing compounds is provided in or on one or more of the negative electrode-side of the cell 12, the adjacent gas separator 16 and any other structure of the device 10 forming a gas chamber 66 between the cell and the gas separator. The invention also extends to the treated cell 12.
摘要:
A high-temperature polymer electrolyte membrane fuel cell stack may include a plurality of cell units; a cooling assembly including a plurality of first independent cooling plates disposed on top surfaces of the plurality of cell units, respectively, and a plurality of second independent cooling plates disposed on bottom surfaces of the plurality of cell units, respectively; and a support assembly configured to support the plurality of cell units and the cooling assembly.
摘要:
The present invention relates to a stack protection method in case of emergency shut down or black out in a solid oxide fuel cell system and, more particularly, to a system and a method for, if supply of fuel gas and water to an anode channel of a stack is discontinued due to emergency shut down or black out, etc. in a solid oxide fuel cell system, preventing an anode from being contaminated by oxygen in the air and preventing re-oxidation of an anode material from occurring and cracks from forming on the stack due to the contamination. A fuel cell according to the present invention is disposed in a hot box along with a fuel cell stack, and has an auxiliary vaporizer which vaporizes and supplies, to a stack anode, water supplied from a water reservoir tank by a water level difference.
摘要:
An electrochemical reaction unit which includes a unit cell including an electrolyte layer, a cathode, and an anode facing each other in a first direction; a current collector disposed on a cathode side of the unit cell; and an electrically conductive porous bonding layer. A bonding region contains a block portion and an electrical conductivity securing portion. The block portion has a pore having a diameter that is 20% or more than the thickness of the bonding region in the first direction. The block portion extends inward from one of opposite ends in a second direction orthogonal to the first direction of the bonding region, and reaches and contains the pore satisfying the pore requirement. The electrical conductivity securing portion is located toward the other end of the bonding region and has a smaller average diameter of pores than the block portion.
摘要:
A method and system for producing carbon dioxide and electricity from a gaseous hydrocarbon feed using a solid oxide fuel cell, a water-gas shift reactor and a reformer.
摘要:
Fuel cell devices and systems are provided. A reaction zone positioned along a portion of the length is configured to be heated to an operating reaction temperature, and has at least one active layer therein comprising an electrolyte separating an anode from an opposing cathode, and fuel and oxidizer gas passages adjacent the respective anode and cathode. At least one cold zone positioned from the first end along another portion of the length is configured to remain below the operating reaction temperature. The anode and cathode each have electrical pathways extending to an exterior surface in the cold zone for electrical connection at the lower temperature. The electrolyte includes at least a portion thereof comprising a ceramic material sintered from a nano-sized powder. In one embodiment, the sintered nano-sized powder provides an uneven surface topography on the electrolyte.
摘要:
A high temperature fuel cell stack is composed of high temperature fuel cells having interconnecting conducting plates for leading off current produced in the high temperature fuel cell. At least one of the plates is formed of an alloy based on Fe with a Cr content of between 17 and 30% by weight and has an average coefficient of thermal expansion of between 13 and 14.times.10.sup.-6 /K in a temperature range from room temperature to 900.degree. C. Two electrodes are disposed between the plates and supplied with a working medium by the plates. One of the electrodes has a thickness of at least 100 .mu.m and the other a thickness of about 30 .mu.m. An electrolyte is disposed between the two electrodes, contains stabilized ZrO.sub.2 and has a thickness of between 5 and 30 .mu.m. The electrodes and the electrolyte have a coefficient of thermal expansion matched to that of the at least one plate. The material costs for the plates are reduced by a factor of 10 to 20 in comparison with prior art plates.
摘要:
Avoiding the use of porous ceramic bearing structures, the proposal is for a 3-layer electrolyte fuel cell element, one electrode (1) of which is at the same time the bearer plate for the active cell element (12, 2, 3), is integrated via component (4) into the frame structure for a cell battery made up of individual elements, and in which the mechanical closing force between the frame structure and the active cell element is released with the aid of a spring-loaded region (11), in order not to expose the thin electrolyte layer (2) to thermally induced mechanical stresses. The active cell element, a combination of two porous and metallic electrodes (1, 3) with a gastight oxide electrolyte layer (2), are preferably produced by the vacuum plasma spray process.